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Journal articles on the topic 'PC-LEDs'

Author: Grafiati

Published: 11 September 2023

Last updated: 31 July 2025

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1

Nguyen Thi, My Hanh, Nguyen Thi Phuong Loan, and Hoang Van Ngoc. "Enhancing light scattering effect of white LEDs with ZnO nanostructures." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 5 (2021): 3838. http://dx.doi.org/10.11591/ijece.v11i5.pp3838-3843.

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Pc-LEDs, the lighting method that blends blue LED light with yellow light from phosphor to discharge white radiation, is one of the most advance known for high lumen output. However, pc-LEDs has inferior due to angular CCT deviation, which prevent pc-LEDs from reaching better performance. As a result, this research is conducted to address the need of pc-LEDs development by introducing a configuration doped with ZnO nanoparticles. The finite-difference time-domain (FDTD) method and the phosphor layer containing ZnO were applied in the experiments. The effect of ZnO-filled on the performance of

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2

My, Hanh Nguyen Thi, Thi Phuong Loan Nguyen, and Van Ngoc Hoang. "Enhancing light scattering effect of white LEDs with ZnO nanostructures." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 5 (2021): 3838–43. https://doi.org/10.11591/ijece.v11i5.pp3838-3843.

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Pc-LEDs, the lighting method that blends blue LED light with yellow light from phosphor to discharge white radiation, is one of the most advance known for high lumen output. However, pc-LEDs has inferior due to angular CCT deviation, which prevent pc-LEDs from reaching better performance. As a result, this research is conducted to address the need of pc-LEDs development by introducing a configuration doped with ZnO nanoparticles. The finite-difference time-domain (FDTD) method and the phosphor layer containing ZnO were applied in the experiments. The effect of ZnO-filled on the performance of

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3

Lei, Po-Hsun, Po-Chun Yang, and Po-Chun Huang. "Investigation of Photonic-Crystal-Structured p-GaN Nanorods Fabricated by Polystyrene Nanosphere Lithography Method to Improve the Light Extraction Efficiency of InGaN/GaN Green Light-Emitting Diodes." Materials 14, no. 9 (2021): 2200. http://dx.doi.org/10.3390/ma14092200.

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We fabricated the photonic-crystal-structured p-GaN (PC-structured p-GaN) nanorods using the modified polystyrene nanosphere (PS NS) lithography method for InGaN/GaN green light-emitting diodes (LEDs) to enhance the light extraction efficiency (LEE). A modified PS NS lithography method including two-times spin-coating processes and the post-spin-coating heating treatment was used to obtain a self-assembly close-packed PS NS array of monolayer as a mask and then a partially dry etching process was applied to PS NS, SiO2, and p-GaN to form PC-structured p-GaN nanorods on the InGaN/GaN green LEDs

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4

Thuy My, Le Thi, My Hanh Nguyen Thi, and Hoang Thinh Nhan. "Yellow-green emitting CaGa2S4:Eu2+ phosphor: an application for enhancing the luminous flux of the white light emitting diodes." Indonesian Journal of Electrical Engineering and Computer Science 32, no. 1 (2023): 90. http://dx.doi.org/10.11591/ijeecs.v32.i1.pp90-97.

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The <span lang="EN-GB">optimal spectral characteristics and photometric qualities in white-emitting light-emitting diodes (WLEDs) featuring red-emitting LEDs instead of phosphor (pc/R-WLEDs) were determined using the luminescent efficiency (LE) theory. The color quality scale (Rf) is higher than 97K for correlating color temperature (CCTs) ranging between 2700K and 6500K. We first identified genuine pc/R-WLEDs having Rf levels at 96–97, LE levels at 120–124 lm/W with CCT levels at 2969K, 4468K, 5682K, as well as 6558K with the utilization of all four-color phosphors: blues (448 nm), redd

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5

Le, Thi Thuy My, Hanh Nguyen Thi My, and Thinh Nhan Hoang. "Yellow-green emitting CaGa2S4:Eu2+ phosphor: an application for enhancing the luminous flux of the white light emitting diodes." Yellow-green emitting CaGa2S4:Eu2+ phosphor: an application for enhancing the luminous flux of the white light emitting diodes 32, no. 1 (2023): 90–97. https://doi.org/10.11591/ijeecs.v32.i1.pp90-97.

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The optimal spectral characteristics and photometric qualities in whiteemitting light-emitting diodes (WLEDs) featuring red-emitting LEDs instead of phosphor (pc/R-WLEDs) were determined using the luminescent efficiency (LE) theory. The color quality scale (Rf) is higher than 97K for correlating color temperature (CCTs) ranging between 2700K and 6500K. We first identified genuine pc/R-WLEDs having Rf levels at 96–97, LE levels at 120–124 lm/W with CCT levels at 2969K, 4468K, 5682K, as well as 6558K with the utilization of all four-color phosphors: blues (448 nm), reddish (650 nm) L

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6

Phuong Loan, Nguyen Thi, and Nguyen Doan Quoc Anh. "Utilizing CaCO3, CaF2, SiO2, and TiO2 particles to enhance color homogeneity and luminous flux of WLEDs." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 5 (2020): 5175. http://dx.doi.org/10.11591/ijece.v10i5.pp5175-5182.

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The chromatic homogeneity and luminous efficiency are two crucial elements for determining a high-quality phosphor-converted LEDs (pc-LEDs). Thus, this paper provides essential information in choosing the particles to enhance lighting properties of high performance pc-LEDs. Scattering enhancement particles (SEP) such as CaCO3, CaF2, SiO2, and TiO2, are combined with yellow phosphor Y3Al5O12:Ce3+ and applied to the lighting devices. Initially, optical simulations are carried out with the support of LightTools program. Next, the Mie-theory is applied to calculate and confirm the results. The cal

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7

My, Hanh Nguyen Thi1, and Ton That Phung. "The analysis of MF resin and CaCO3 diffuser-loaded encapsulations to enhance the homogeneity of correlated color temperature for phosphor-converted LEDs." TELKOMNIKA Telecommunication, Computing, Electronics and Control 19, no. 2 (2021): pp. 608~615. https://doi.org/10.12928/TELKOMNIKA.v19i2.16519.

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The most popular method used in the production of phosphor-converted LEDs (pc-LEDs) is dispensing phosphor freely. However, this method is inferior in generating good angular correlated color temperature (CCT) homogeneity. Thus, in this article, a diffuser-loaded encapsulation is proposed as a potential solution for better CCT uniformity. The paper provides a detailed investigation on how melamine formaldehyde (MF) resin and CaCO3 loaded encapsulations impact the uniformity of CCT, as well as the lumen efficacy of pc-LEDs. The results demonstrate that between MF resin and CaCO3 loaded encapsul

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8

Bauer, Stefan. "Blue-Light Hazard of Light-Emitting Diodes Assessed with Gaussian Functions." International Journal of Environmental Research and Public Health 18, no. 2 (2021): 680. http://dx.doi.org/10.3390/ijerph18020680.

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The high blue proportion of phosphor-conversion white-light emitting diodes (pc-LEDs), especially of those with higher correlated color temperatures (CCT), raises concern about photochemically induced retinal damages. Although almost all general lighting service LEDs are safe, other applications exist, like spotlights for theatres or at construction sites, that can pose a severe blue-light hazard (BLH) risk, and their photobiological safety must be assessed. Because of required but challenging radiance measurements, a calculative approach can be supportive for risk assessment. It is the aim of

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9

Nguyen, Thi Phuong Loan, and Doan Quoc Anh Nguyen. "Utilizing CaCO3, CaF2, SiO2, and TiO2 particles to enhance color homogeneity and luminous flux of WLEDs." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 5 (2020): 5175–82. https://doi.org/10.11591/ijece.v10i5.pp5175-5182.

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The chromatic homogeneity and luminous efficiency are two crucial elements for determining a high-quality phosphor-converted LEDs (pc-LEDs). Thus, this paper provides essential information in choosing the particles to enhance lighting properties of high performance pc-LEDs. Scattering enhancement particles (SEP) such as CaCO<sub>3</sub>, CaF<sub>2</sub>, SiO<sub>2</sub>, and TiO<sub>2</sub>, are combined with yellow phosphor Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>:Ce<sup>3+</sup> and applied to the lighting devices. Initially, optical simulations are carried out with the support of LightTool

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10

Lee, Hoyoung, Sungho Cho, Jongguk Lim, et al. "Performance Comparison of Tungsten-Halogen Light and Phosphor-Converted NIR LED in Soluble Solid Content Estimation of Apple." Sensors 23, no. 4 (2023): 1961. http://dx.doi.org/10.3390/s23041961.

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A Tungsten-Halogen (TH) lamp is the most popular light source in NIR spectroscopy and hyperspectral imaging, which requires a warm-up to reach very high temperatures of up to 250 °C and take a long time for radiation stabilization. Consequently, it has a large enough volume to enable heat dissipation to prevent the thermal runaway of the electric circuit and turn out its power efficiency very low. These are major barriers for miniaturizing spectral systems and hyperspectral imaging devices. However, TH lamps can be replaced by pc-NIR LEDs in order to avoid high temperature and large volume. We

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11

Kräuter, Gertrud, Angela Eberhardt, Florian Peskoller, et al. "Sol–gel matrix for YAG:Ce phosphors in pc-LEDs." Journal of Sol-Gel Science and Technology 97, no. 2 (2021): 458–65. http://dx.doi.org/10.1007/s10971-020-05457-y.

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AbstractSol–gel formulations were applied to replace silicone as matrix material for phosphors in pc-LEDs. The content of organic groups was minimized in order to reduce yellowing during the operation of the elements. It was possible to evenly embed YAG:Ce particles in sol–gel binders. Further processing on LED chips resulted in operational light sources; and their performance was compared to standard silicone-based elements. Additional deposition of ALD laminates seals possible defects within the sol–gel matrix as additional protection of the phosphors and the underlying LEDs.

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12

Yanagihara, Ai, and Katsumi Kishino. "Monolithically integrated green-to-orange color InGaN-based nanocolumn photonic crystal LEDs with directional radiation beam profiles." Applied Physics Express 15, no. 2 (2022): 022013. http://dx.doi.org/10.35848/1882-0786/ac4674.

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Abstract In this study, the monolithic integration of LEDs with different emission colors (wavelengths of 543, 573, and 597 nm) with the directional radiation profiles was demonstrated. InGaN/GaN nanocolumn arrays ordered in a triangular lattice were prepared side by side, changing the diameter of the n-GaN nanocolumn (D n-GaN). The periodic arrangement of the nanocolumns led to the photonic crystal (PC) effect. The photonic band edge wavelength (λ B) and the InGaN bandgap were controlled by the D n-GaN. By controlling λ B closely at the bandgap wavelength, the PC effect provided directional b

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13

Ha, Thanh Tung, and Phuc Dang Huu. "Study of Ba2Li2Si2O7:Eu2+ phosphor for enhancing the luminous flux of white LEDs." TELKOMNIKA (Telecommunication, Computing, Electronics and Control) 21, no. 3 (2023): 641–48. https://doi.org/10.12928/telkomnika.v21i3.24748.

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The best spectrum characteristics and photometric productivities of white light emitting diode (WLED) device possessing light emitting diodes (LEDs) in red rather than phosphor pc/R-WLEDs with the hue fidelity index (Rf) > 97 for correlated color temperatures (CCTs) between 2700 K and 6500 K were attained using the illumination effectiveness (LE) model. We demonstrate four practical pc/R-WLEDs that have indices of Rf<sub> </sub>and LE of 96–97 and 120–124 lm/W, respectively, under CCT values measured at 2969 K, 4468 K, 5682 K, as well as 6558 K. These LED packages use blue

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14

Shao, Qiyue, Hao Ding, Leqi Yao, Junfeng Xu, Chao Liang, and Jianqing Jiang. "Photoluminescence properties of a ScBO3:Cr3+ phosphor and its applications for broadband near-infrared LEDs." RSC Advances 8, no. 22 (2018): 12035–42. http://dx.doi.org/10.1039/c8ra01084f.

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15

Li, Biaomin, Shihong Xia, Wei Guo, et al. "Promoting Light Extraction Efficiency of Ultraviolet Light Emitting Diodes by Nanostructure Optimization." Crystals 12, no. 11 (2022): 1601. http://dx.doi.org/10.3390/cryst12111601.

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Ultraviolet (UV) light-emitting diodes (LEDs), as one of the more promising optoelectronic devices, are intrinsically limited by poor light extraction efficiencies (LEEs). To unlock the full potential of UV-LEDs, we propose a simple and effective strategy to promote the LEEs of UV-LEDs by screening and tailoring suitable optical structures/designs through rigorous numerical simulations. The photonic crystals (PCs) and/or nano-patterned sapphire substrates (NPSSs) equipped with the nano-pillar, nano-cone, nano-oval, and their derivates, are particularly investigated. The simulated results show

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16

Liu, Shengqiang, Zhizhen Wang, Hao Cai, Zhen Song, and Quanlin Liu. "Highly efficient near-infrared phosphor LaMgGa11O19:Cr3+." Inorganic Chemistry Frontiers 7, no. 6 (2020): 1467–73. http://dx.doi.org/10.1039/d0qi00063a.

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LaMgGa<sub>11</sub>O<sub>19</sub>:Cr<sup>3+</sup> phosphor was synthesized successfully, showing broadband NIR emission centered at ∼770 nm, high efficiency and excellent thermal quenching resistance for pc-LEDs.

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17

Thinh, Cong Tran, Doan Quoc Anh Nguyen, and Thi Phuong Loan Nguyen. "Comparison of calcium carbonate and titania particles on improving color homogeneity and luminous flux of WLEDs." TELKOMNIKA Telecommunication, Computing, Electronics and Control 18, no. 5 (2020): 2690~2695. https://doi.org/10.12928/TELKOMNIKA.v18i5.13552.

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In this paper, the experiments on phosphor-converted LEDs (pc-LEDs) with a correlated color temperature (CCT) of 8500K has been conducted with the scattering enhancement particles (SEPs) to achieve the higher color uniformity and emitted luminous flux of pc-LEDs. Moreover, this paper also introduced about choosing scattering enhancement particles (SEPs), including calcium carbonate (CaCO3) and titania (TiO2), and compared these particles’ properties by adding them into the yellow Y3Al5O12:Ce3+ phosphor compounding. Afterward, the LightTools program was applied to illustrate the optical s

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18

Kim, Sun Woog, Taewook Kang, and Young Ji Park. "Development of NaY₉Si₆O₂₆:Yb³⁺ Phosphor with High Thermal Stability and Its Crystals Structure and Luminescent Properties for NIR Anti-Counterfeiting." ECS Meeting Abstracts MA2023-02, no. 50 (2023): 2469. http://dx.doi.org/10.1149/ma2023-02502469mtgabs.

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Near-infrared (NIR) radiation has attracted considerable industrial and research interest. NIR emission has promising potential for varied applications, mostly related to the characterization of chemicals, security, pharmaceutical, medical, cosmetic, food, and agricultural industries, which contribute to the advancement of modern technology. Emission sources such as tungsten halogen lamps, light emitting diodes (LEDs) and phosphor converted LEDs (pc-LEDs) can emit in the infrared range. Among these, NIR pc-LED is considered as the most suitable emission source because it provides adequate emis

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19

Contreras-Ropero, Jefferson E., Valentina S. Lidueñez-Ballesteros, Angie D. Rodríguez-Bohórquez, et al. "The Effect of LEDs on Biomass and Phycobiliproteins Production in Thermotolerant Oscillatoria sp." Applied Sciences 12, no. 22 (2022): 11664. http://dx.doi.org/10.3390/app122211664.

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This study evaluates the role of different LED lights (white, blue/red), intensity (µmol m−2 s−1), and photoperiod in the production of biomass and phycocyanin-C, allophycocyanin and phycoerythrin (C-PC, APC, and PE respectively) from a novel thermotolerant strain of Oscillatoria sp. Results show that a mixture of white with blue/red LEDs can effectively double the biomass concentration up to 1.3 g/L, while the concentration of the selected phycobiliproteins increased proportionally to biomass. Results also indicate that high light intensities (>120 µmol m−2 s−1) can diminish the final conc

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20

WANG, YAN, FUGEN WU, XIN ZHANG, et al. "ENHANCEMENT OF LIGHT EXTRACTING FROM GaN-BASED BLUE LIGHT EMITTING DIODES USING PHOTONIC CRYSTAL." Modern Physics Letters B 26, no. 12 (2012): 1250071. http://dx.doi.org/10.1142/s0217984912500716.

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Photonic crystal (PC) structures on LED have been known to enhance the light extraction significantly. In this paper, we report the light energy of GaN -based blue lighting emitting diode (LED) with perfect area photonic crystal (PPC) structure and defect area photonic crystal (DPC) structure. As a result, the light extracting energy of LEDs with PPC structure enhanced little compared to that of without PC structure. In addition, the light extracting energy of blue LED with DPC structure was remarkably improved.

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21

Chang, Yu-Yu, Benoît Glorieux, Chien-Hung Hsu, et al. "Influence of ZrO2 particles on the optical properties of pc-LEDs." Optical Materials 55 (May 2016): 55–61. http://dx.doi.org/10.1016/j.optmat.2016.03.025.

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22

Li, Chao, Xiao-Ming Wang, Feng-Feng Chi, Zu-Pei Yang, and Huan Jiao. "A narrow-band blue emitting phosphor Ca8Mg7Si9N22:Eu2+ for pc-LEDs." Journal of Materials Chemistry C 7, no. 13 (2019): 3730–34. http://dx.doi.org/10.1039/c9tc00855a.

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Ca<sub>8</sub>Mg<sub>7</sub>Si<sub>9</sub>N<sub>22</sub> crystallizes in a tetragonal space group P4<sub>2</sub>/nmc (No. 137) with a unit cell of a = 7.3271(11) Å and c = 10.336(2) Å. Ca<sub>8</sub>Mg<sub>7</sub>Si<sub>9</sub>N<sub>22</sub>:Eu<sup>2+</sup> shows a narrow-band blue emission peaking at 400 nm with an intriguing bandwidth ∼34 nm and shows remarkably high thermal quenching resistance, maintaining 92% photoluminescence emission intensity at 420 K and 75% at 700 K of that measured at room temperature.

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23

Pham, Viet Tien, Ngoc Hung Phan, Guo-Feng Luo, Hsiao-Yi Lee, and Doan Quoc Anh Nguyen. "The Application of Calcium Carbonate CaCO3 and Titania TiO2 for Color Homogeneity and Luminous Flux Enhancement in PC-LEDs." Journal of Advanced Engineering and Computation 5, no. 2 (2021): 75. http://dx.doi.org/10.25073/jaec.202152.295.

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This article studies the development method of pc-LED, a phosphor-converted lighting emitting diode, with scattering enhancement particles (SEPs) at 7000 K correlated color temperature. The pc-LED is an advanced lighting solution that has been applied in many different categories; nonetheless, to keep up with the demands of modern lighting, the pc-LEDs need to enhance the color homogeneity and luminous flux. The detailed experiments on the two SEPs used in the articles are also presented. The experiments include combining each of these SEPs with a yellow phosphor Y3Al5O12:Ce3+ to test their pr

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Wu, Peiyu, Jiaqi Ju, and Qi Yao. "Luminous and Melanopic Efficiency Performance of Phosphor-Converted LEDs with Tunable Spectral Characteristics." Applied Sciences 10, no. 18 (2020): 6198. http://dx.doi.org/10.3390/app10186198.

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In this work, we investigated the luminous and melanopic efficiency of the radiation (LER/MER) performances of phosphor-converted LEDs (PC LEDs) with tunable spectral characteristics, namely peak wavelength, full width at half maximum (FWHM), and emission intensity. We constructed theoretical PC LED spectra based on the characteristics extracted from the database of IES TM-30-15, analyzed the relations between LER/MER and different spectral characteristics, and proposed spectral composition strategies at various correlated color temperatures (CCTs). Results showed that both MER and LER are lin

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Nguyen Thi, Dieu An, Nguyen Doan Quoc Anh, and Phan Xuan Le. "Utilizing the right phosphor in near-ultraviolet and blue light-emitting diode devices to generate white illumination." Indonesian Journal of Electrical Engineering and Computer Science 27, no. 2 (2022): 715. http://dx.doi.org/10.11591/ijeecs.v27.i2.pp715-721.

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In the <span>scenario of solid-state lighting (SSL) gradually replacing old standard techniques; the pc-LEDs (or diodes based on conversion phosphor) becomes a common method for creating white illumination, based on SSL. As of now, both of the UV-LEDs and the blue LEDs have been still being considered for the task of creating white illumination through phosphor excitation as it hasn’t been known which LED type is truly superior. It is common that when it comes to phosphor, people will overlook the performance in LED devices with a wavelength range of 365 nm to 470 nm. Our research demons

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Thi, Dieu An Nguyen, Nguyen Doan Quoc Anh, and Phan Xuan Le. "Utilizing the right phosphor in near-ultraviolet and blue lightemitting diode devices to generate white illumination." Indonesian Journal of Electrical Engineering and Computer Science 27, no. 2 (2022): 715–21. https://doi.org/10.11591/ijeecs.v27.i2.pp715-721.

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In the scenario of solid-state lighting (SSL) gradually replacing old standard techniques; the pc-LEDs (or diodes based on conversion phosphor) becomes a common method for creating white illumination, based on SSL. As of now, both of the UV-LEDs and the blue LEDs have been still being considered for the task of creating white illumination through phosphor excitation as it hasn’t been known which LED type is truly superior. It is common that when it comes to phosphor, people will overlook the performance in LED devices with a wavelength range of 365 nm to 470 nm. Our research demonstrates

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27

Shen, Xiao Xia, Ya Zhou Ren, and Guo Yan Dong. "Optimizing Design of LEDs with Photonic Crystal and Planer Micro Cavity for High Extraction Efficiency." Advanced Materials Research 860-863 (December 2013): 937–40. http://dx.doi.org/10.4028/www.scientific.net/amr.860-863.937.

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LED structures with the introducing of surface PC and planer micro cavity was described to improve the light extraction efficiency of LEDs. The distributions of guided modes propagated in LED were analyzed, and the modal extraction lengths were determined using high-resolution angle-resolved measurements in order to research the interaction of each guided mode with PCs. The impact of structure parameters design on modal extraction length was learned. Result shows that PC extraction will not interfere with micro cavity effects, and can be used together to enhance LEE.

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Zhang, Qianqian, Guogang Li, Peipei Dang, et al. "Enhancing and tuning broadband near-infrared (NIR) photoluminescence properties in Cr3+-doped Ca2YHf2Al3O12 garnet phosphors via Ce3+/Yb3+-codoping for LED applications." Journal of Materials Chemistry C 9, no. 14 (2021): 4815–24. http://dx.doi.org/10.1039/d0tc05657j.

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NIR emission from 650 nm to 1100 nm in a novel Ca<sub>2</sub>YHf<sub>2</sub>Al<sub>3</sub>O<sub>12</sub>:Cr<sup>3+</sup>,Yb<sup>3+</sup> garnet phosphor with good thermal stability and high internal quantum efficiency is designed for NIR pc-LEDs.

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Lipina, Olga A., Ludmila L. Surat, Yana V. Baklanova, et al. "Crystal structure, luminescence properties and thermal stability of BaY2−xEuxGe3O10 phosphors with high colour purity for blue-excited pc-LEDs." New Journal of Chemistry 44, no. 38 (2020): 16400–16411. http://dx.doi.org/10.1039/d0nj02677h.

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The luminescence properties of reddish-orange emitting BaY<sub>2−x</sub>Eu<sub>x</sub>Ge<sub>3</sub>O<sub>10</sub> phosphors crystallizing in the monoclinic system (S.G. P2<sub>1</sub>/m) have been discussed in detail. The studied germanates are appropriate for applications in high-powered pc-LEDs.

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Ly, Thanh Binh, Phung Ton That, and Phan Xuan Le. "Effects of titanium dioxide quantum dots on the color deviation and luminous flux of white light-emitting diodes." Indonesian Journal of Electrical Engineering and Computer Science 27, no. 2 (2022): 611–17. https://doi.org/10.11591/ijeecs.v27.i2.pp611-617.

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The application of quantum dots has been considered as a promising approach to the advancement of phosphor-converted light-emitting diodes (pc-LEDs) since they perform an excellent extinction coefficient. Yet, it is challenging to manage their influences on the optical properties of LEDs due to their different nanometers in size. Hence, the object of this research is to analyze the influences of quantum dot (QDs) to figure out the solution to control the enhancement of LED lighting performances. Particularly, the study worked on investigating the scattering and absorption features of titanium

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Li, Chenghang, Zikeng Fang, Ying Yan, et al. "Study on the Performance of Deep Red to Near-Infrared pc-LEDs by the Simulation Method Considering the Distribution of Phosphor Particles." Micromachines 15, no. 8 (2024): 1035. http://dx.doi.org/10.3390/mi15081035.

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Effectively utilizing deep red to near-infrared (DR-NIR) phosphors to achieve the optimal performance of NIR phosphor-converted white LEDs (DR-NIR pc-wLEDs) is currently a research hotspot. In this study, an optical model of DR-NIR pc-wLEDs with virtual multilayer fluorescent films was established based on the Monte Carlo ray-tracing method. Different gradient distributions of the particles were assigned within the fluorescent film to explore their impact on the optical performance of pc-LEDs. The results show that, for the case with single-type particles, distributing more DR-NIR particles fa

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32

Li, Lanjiao, Ying Chen, Rongfei Wei, et al. "Enhanced thermal stability of broadband NIR phosphors Ca3.3Mg0.7ZrGe3O12:Cr3+ for pc-LEDs." Journal of Alloys and Compounds 1010 (January 2025): 177293. http://dx.doi.org/10.1016/j.jallcom.2024.177293.

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33

Dutta, Partha S., and Kathryn M. Liotta. "A design methodology for phosphor mixtures for tunable spectrum LEDs." MRS Advances 1, no. 50 (2016): 3435–40. http://dx.doi.org/10.1557/adv.2016.548.

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ABSTRACT Spectrum tuning in phosphor converted white light emitting diodes (pc-WLED) is done by mixing powders of phosphor compounds (with different emission wavelengths) in different weight ratios. In this paper, a new methodology for designing unique full spectrum phosphor mixtures (with fixed weight ratios of different emission phosphor) has been presented that could provide a wide range of pc-WLED spectrum. This is done by optimizing the excitation and emission spectra of the phosphor compounds used in the mixture. A unique phosphor mixture comprising of Eu2+ and Ce3+-Na1+ activated compou

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Binh Ly, Thanh, Phung Ton That, and Phan Xuan Le. "Effects of titanium dioxide quantum dots on the color deviation and luminous flux of white light-emitting diodes." Indonesian Journal of Electrical Engineering and Computer Science 27, no. 2 (2022): 611. http://dx.doi.org/10.11591/ijeecs.v27.i2.pp611-617.

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The application of <span>quantum dots has been considered as a promising approach to the advancement of phosphor-converted light-emitting diodes (pc-LEDs) since they perform an excellent extinction coefficient. Yet, it is challenging to manage their influences on the optical properties of LEDs due to their different nanometers in size. Hence, the object of this research is to analyze the influences of quantum dot (QDs) to figure out the solution to control the enhancement of LED lighting performances. Particularly, the study worked on investigating the scattering and absorption features

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Edwar, Jacinto Gómez, Martínez Santa Fernando, and Montiel Ariza Holman. "Transformation and dynamic visualization of images from computer through an FPGA in a matrix of LED." TELKOMNIKA Telecommunication, Computing, Electronics and Control 17, no. 6 (2019): 3003–9. https://doi.org/10.12928/TELKOMNIKA.v17i6.12710.

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This article shows the implementation of a system that uses a graphic interface to load a digital image into a programmable logic device, which is stored in its internal RAM memory and is responsible for visualizing it in a matrix of RGB LEDs, so that This way, the LEDs show an equivalent to the image that was sent from the PC, conserving an aspect ratio and respecting as much as possible the color of the original image. To carry out this task, a Matlab script was designed to load the image, convert and format the data, which are transmitted to the FPGA using the RS232 protocol. The FPGA is in

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Gao, Tongyu, Yuanhong Liu, Ronghui Liu, and Weidong Zhuang. "Research Progress and Development of Near-Infrared Phosphors." Materials 16, no. 8 (2023): 3145. http://dx.doi.org/10.3390/ma16083145.

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Near-infrared (NIR) light has attracted considerable attention in diverse applications, such as food testing, security monitoring, and modern agriculture. Herein, the advanced applications of NIR light, as well as various devices to realize NIR light, have been described. Among the diverse NIR light source devices, the NIR phosphor-converted light-emitting diode (pc-LED), serving as a new-generation NIR light source, has obtained attention due to its wavelength-tunable behavior and low-cost. As one of the key materials of the NIR pc-LED, a series of NIR phosphors have been summarized depending

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Nguyen Thi, Dieu An, and Phuc Dang Huu. "Application of green-emitting ZnS:Eu<sup>2+</sup> for boosting the spectrum of white light-emitting diode packages." International Journal of Electrical and Computer Engineering (IJECE) 12, no. 5 (2022): 4765. http://dx.doi.org/10.11591/ijece.v12i5.pp4765-4771.

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Through utilizing a nonlinear application to acquire the best lumen efficiency (LE) for radiation (also known as LER) when color rendering index (CRI) value, especially CRI of R9 for strong red exceeds 90 with correlated color temperature (CCT) range of 2700-6500 K, the white light emitting diodes (WLED) package with adjustable CCT value and comprised of mixed-type light-emitting diodes (LEDs) can be acquired. The WLED model here contains blue and red LEDs with direct emission and a phosphorconversion blue LED or pc/B-LED (including orange and green phosphors mixed with blue LED colorant). The

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Dieu, An Nguyen Thi, and Dang Huu Phuc. "Application of green-emitting ZnS:Eu2+ for boosting the spectrum of white light-emitting diode packages." International Journal of Electrical and Computer Engineering (IJECE) 12, no. 5 (2022): 4765–71. https://doi.org/10.11591/ijece.v12i5.pp4765-4771.

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Through utilizing a nonlinear application to acquire the best lumen efficiency (LE) for radiation (also known as LER) when color rendering index (CRI) value, especially CRI of R9 for strong red exceeds 90 with correlated color temperature (CCT) range of 2700-6500 K, the white light emitting diodes (WLED) package with adjustable CCT value and comprised of mixed-type light-emitting diodes (LEDs) can be acquired. The WLED model here contains blue and red LEDs with direct emission and a phosphor-conversion blue LED or pc/B-LED (including orange and green phosphors mixed with blue LED colorant). Th

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Dang Huu, Phuc, Nguyen Le Thai, and Phan Xuan Le. "Studying CdS:In green phosphor's impacts on white-light emitting diode with higher luminous flux." Materials Science-Poland 40, no. 2 (2022): 159–69. http://dx.doi.org/10.2478/msp-2022-0014.

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Abstract A lumen efficiency (LE) simulation model with the Monte Carlo method is introduced to the white-light-emitting diode devices that utilize the red LED (light-emitting diode) dyes instead of red-emitting phosphors (R-WLEDs). By simulating this model, the desirable spectrum-related indices and photometric efficiencies, which are adequate for superior chromatic consistency (or R f > 97), can be accomplished for R-WLEDs under the correlated color temperature (CCT) range of 5000–8000 K. The structure of the R-LED has LEDs in red and blue colors (650 nm and 448 nm) combined with phosphors

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Taufiqurrohman Zain, Alex. "Pengujian sensor fotodetektor sebagai alat ukur kadar gula pada larutan gula." Jurnal TAMBORA 4, no. 1 (2020): 39–45. http://dx.doi.org/10.36761/jt.v4i1.570.

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Photodiode is a type of photodetector. P-I-N (PIN) link photodiode was chosen in this study. This selection is based on high sensitivity and rapid response to any changes in light. BPW 34 type photodiode is used as a photodetector and RGB bright LED as its light source. The selection of RGB bright LEDs is based on its ability to automatically change the beam spectrum based on bit changes. As a medium for propagating light, a single mode optical fiber is used. In addition to designing hardware, this research also designs applications through Arduino IDE 1.0.4 and LabVIEW 2013 so that hardware c

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Wang, Xiao-Ming, Xue Zhang, Shi Ye та Xi-Ping Jing. "A promising yellow phosphor of Ce3+/Li+ doped CaSiN2−2δ/3Oδ for pc-LEDs". Dalton Transactions 42, № 14 (2013): 5167. http://dx.doi.org/10.1039/c3dt32582b.

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Kim, Seungtaek, Jongseok Kim, Hyungtae Kim, and Yong-Kweon Kim. "Effects of Current Modulation Conditions on the Chromaticity of Phosphor Converted (PC) White LEDs." Journal of the Optical Society of Korea 16, no. 4 (2012): 449–56. http://dx.doi.org/10.3807/josk.2012.16.4.449.

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Dong, Xiaoqian, Yunyi Lu, Xiaoru Gong, et al. "Sol-gel synthesized Cr3+:Y3MgAl3SiO12 broadband near-infrared phosphor for high-efficiency pc-LEDs." Journal of Alloys and Compounds 1032 (June 2025): 181235. https://doi.org/10.1016/j.jallcom.2025.181235.

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Wang, Kaili, Xiangyuan Dong, Yanyan Bu, and Xiangfu Wang. "Design of photonic crystals for light‐emitting diodes." Journal of the American Ceramic Society, August 10, 2023. http://dx.doi.org/10.1111/jace.19388.

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AbstractPhotonic crystals (PC) can greatly enhance the optoelectronic performance of LEDs, due to their distinctive color and photonic band gap, etc. Therefore, many scholars have conducted extensive research based on the high light extraction efficiency, good monochromaticity, and other excellent optoelectronic properties of PC LEDs. This review discusses the main principles of photonic crystals to improve the optoelectronic performance of LEDs and summarizes 12 structural applications of photonic crystal LEDs, such as PC slabs, Bragg grating, Backside reflectors, Surface PC, Embedded PC, Dua

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Wang, Xuejiao, Xiaowen Feng, Maxim Molokeev, et al. "Broadband green to broadband deep red modulation of Bi3+ luminescence in Lu2WO6 by Gd3+ doping and application in high color rendering index white LED and Near-infrared LED." Dalton Transactions, 2023. http://dx.doi.org/10.1039/d2dt03751c.

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Phosphors that exhibit tunable broadband emissions are highly desired in multi-functional LEDs, including pc-WLEDs and pc-NIR LEDs. In this work, broadband emissions were obtained and modulated in the unexpectedly wide...

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Wei, Mingkai, Zixi Chen, Yongying Chen, et al. "Achieving High Performance Ultra-Broadband Near-infrared Emission through Multi-site Occupancy and Energy Transfer Strategy for NIR LED Applications." Inorganic Chemistry Frontiers, 2025. https://doi.org/10.1039/d5qi00215j.

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Broadband near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) are considered to be at the forefront of the development of next-generation NIR light sources. However, the performance of NIR pc-LEDs is severely...

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Xie, Xin, Wanyin Ge, Ye Tian, Maohao Yang, and Yongxiang Li. "A Novel Dual-mode Broadband Near-infrared Phosphor Mg5Ga2Sn2O12:Cr3+, Ni2+ Designed Based on Energy Transfer Strategy." Inorganic Chemistry Frontiers, 2025. https://doi.org/10.1039/d5qi00881f.

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Near-infrared (NIR) phosphor-converted light-emitting diodes (NIR-pc-LEDs) are considered as ideal next-generation NIR light sources. However, the commercialization of NIR-pc-LEDs has been hindered by the narrow full width at half maximum...

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Li, Ruiyang, Yongfu Liu, Chen Jin, et al. "Boosting Applications with High‐Performance Near‐Infrared Phosphor‐Converted Light‐Emitting Diodes." Laser & Photonics Reviews, December 12, 2023. http://dx.doi.org/10.1002/lpor.202300608.

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AbstractNear‐infrared (NIR) phosphor‐converted (pc) light‐emitting diodes (LEDs) are gaining popularity as smart NIR spectroscopy light sources. However, the low wall‐plug efficiency (WPE) of NIR pc‐LEDs has limited their applications due to the comprehensive properties of external quantum efficiencies (EQEs) and thermal stability for NIR phosphors. In this study, a simple strategy is presented to achieve high‐performance NIR phosphors by breaking the d–d parity forbidden transitions of Cr3+ in the garnet host by introducing asymmetric vibrations via lattice distortions. The achieved EQE is as

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Balhara, Annu, Santosh Kumar Gupta, Brindaban Modak, et al. "Synergy between Structural Rigidity and Cluster Defects in Bright Near-Infrared Cr3+-based Phosphor for Excellent Thermal Stability and Long Afterglow." Journal of Materials Chemistry C, 2024. http://dx.doi.org/10.1039/d4tc01530d.

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Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) driven by blue LEDs emerged as promising future NIR light sources with high energy efficiency and compact structure for applications in medical diagnosis, night...

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Li, Yuyan, Ye Jin, Fei Fang, et al. "The broadband emission of Cr3+ doped CaY2Mg2Ge3O12 and its applications for NIR detector." Dalton Transactions, 2023. http://dx.doi.org/10.1039/d3dt03370h.

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Phosphor-converted light-emitting diode (pc-LED) is a prime light source in smart broadband near-infrared (NIR) spectroscopy. The performance of NIR pc-LEDs crucially depends on the employed NIR luminescence materials. In this...

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