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Articles de revues sur le sujet « Organic emitters »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 31 juillet 2025

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1

Dini, Danilo. "Electrochemiluminescence from Organic Emitters." Chemistry of Materials 17, no. 8 (2005): 1933–45. http://dx.doi.org/10.1021/cm049567v.

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Ryu, Chan Hee, Un Hyeok Jo, Jun Yeob Lee, and Kang Mun Lee. "P‐111: Tetradentate Ligand‐Based Novel Platinum(II) Complex and Its Outstanding Performance in Blue Phosphorescent Organic Light‐Emitting Diodes." SID Symposium Digest of Technical Papers 54, no. 1 (2023): 1275–78. http://dx.doi.org/10.1002/sdtp.16812.

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Even though the remarkable growth of the organic light‐emitting diode (OLED) industry has occurred via continuous, extensive efforts toward the utilization of various organometallic luminophores as phosphorescent emitters, the development of blue phosphorescent emitters with improved efficiencies and high electrochemical stabilities is essential. To satisfy this, developing emitter featuring a narrow full width at half maximum (FWHM) is necessary. We herein designed and preparation of a novel tetradentate Pt(II) complex, Pt3, and its application as blue phosphorescent emitters in OLED devices.

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3

Service, R. F. "Organic Light Emitters Gain Longevity." Science 273, no. 5277 (1996): 878–80. http://dx.doi.org/10.1126/science.273.5277.878.

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Shizu, Katsuyuki, Jiyoung Lee, Hiroyuki Tanaka, et al. "Highly efficient electroluminescence from purely organic donor–acceptor systems." Pure and Applied Chemistry 87, no. 7 (2015): 627–38. http://dx.doi.org/10.1515/pac-2015-0301.

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AbstractThermally activated delayed fluorescence (TADF) emitters are third-generation electroluminescent materials that realize highly efficient organic light-emitting diodes (OLEDs) without using rare metals. Here, after briefly reviewing the principles of TADF and its use in OLEDs, we report a sky-blue TADF emitter, 9-(4-(benzo[d]thiazol-2-yl)phenyl)-N3,N3,N6,N6-tetraphenyl-9H-carbazole-3,6-diamine (DAC-BTZ). DAC-BTZ is a purely organic donor–acceptor-type molecule with a small energy difference between its lowest excited singlet state and lowest triplet state of 0.18–0.22 eV according to fl

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Kang, Jihoon, Soon Ok Jeon, Ha Lim Lee, Seung Chan Kim, and Jun Yeob Lee. "P‐215: Emission Mechanism‐Tunned Fused Indolo[3,2,1‐jk]carbazole‐based Multiple Resonance Emitters for Long Device Operational Lifetime." SID Symposium Digest of Technical Papers 55, no. 1 (2024): 2198–201. http://dx.doi.org/10.1002/sdtp.18046.

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In blue organic light‐emitting diodes (OLEDs), the importance of terminal emitters, which determine device operational characteristics, has been grown. Although multiple resonance (MR) type emitters can provide high color purity and high device efficiency, the high triplet energy (ET) of emitters often cause issues on long‐term device operation. In this work, as a solution to implementing stable operation of blue OLEDs, novel emission‐mechanism‐tuned MR type emitters were developed based on fused indolo[3,2,1‐jk]carbazole framework. The molecular structural changes effectively stabilized the E

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Gerhardt, Ilja, Bernhard Grotz, Petr Siyushev, and Jörg Wrachtrup. "Coherent interaction of single molecules and plasmonic nanowires." International Journal of Modern Physics B 31, no. 24 (2017): 1740004. http://dx.doi.org/10.1142/s0217979217400045.

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Quantum plasmonics opens the option to integrate complex quantum optical circuitry onto chip scale devices. In the past, often external light sources were used and nonclassical light was coupled in and out of plasmonic structures, such as hole arrays or waveguide structures. Another option to launch single plasmonic excitations is the coupling of single emitters in the direct proximity of, e.g., a silver or gold nanostructure. Here, we present our attempts to integrate the research of single emitters with wet-chemically grown silver nanowires. The emitters of choice are single organic dye mole

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Tourneur, P., F. Lucas, C. Quinton, et al. "White-light electroluminescence from a layer incorporating a single fully-organic spiro compound with phosphine oxide substituents." Journal of Materials Chemistry C 8, no. 41 (2020): 14462–68. http://dx.doi.org/10.1039/d0tc03285a.

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Han, Si Hyun, and Jun Yeob Lee. "Spatial separation of sensitizer and fluorescent emitter for high quantum efficiency in hyperfluorescent organic light-emitting diodes." Journal of Materials Chemistry C 6, no. 6 (2018): 1504–8. http://dx.doi.org/10.1039/c7tc05283a.

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A quantum efficiency improving device approach to harvest singlet excitons of fluorescent emitters was developed by sequential deposition of sensitizer-doped emitting layer and fluorescent emitter doped emitting layer.

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9

Fortner, Jacob, and YuHuang Wang. "Chiral Emission from Organic Color Centers in Carbon Nanotubes: A Theoretical Study." ECS Meeting Abstracts MA2025-01, no. 12 (2025): 988. https://doi.org/10.1149/ma2025-0112988mtgabs.

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The quantized nature and orthogonality of left- and right-handed circular polarization states make photons ideal candidates as qubits for quantum technologies. However, generating chiral single photons often requires coupling a single-photon emitter to large-scale waveguides or applying strong magnetic fields to break symmetry and induce photon chirality. An ideal approach would be to achieve chiral emission directly from a molecular- or atomic-scale single-photon emitter with inherent structural or electronic asymmetry. In this study, we use time-dependent density functional theory to explore

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Hao, Fengzhen, Jiusheng Li, Zhen Wang, and Yanfeng Li. "Effect of Chlorination and Acidification on Clogging and Biofilm Formation in Drip Emitters Applying Secondary Sewage Effluent." Transactions of the ASABE 61, no. 4 (2018): 1351–63. http://dx.doi.org/10.13031/trans.12764.

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Abstract. The risk and inducing mechanism of emitter clogging vary with the types of ions in the irrigation water. The effectiveness of chlorination and acidification treatments in reducing emitter clogging has seldom been comparatively studied. The objective of this study was to quantify the influence of chlorination and acidification in reducing clogging in emitters applying secondary sewage effluent with different types of ions. Two types of emitters with plain channels and one type of emitter with a labyrinth structure were selected to investigate the clogging control strategy by measuring

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11

Meng, Xin-Yue, Zi-Qi Feng, You-Jun Yu, Liang-Sheng Liao, and Zuo-Quan Jiang. "Highly Efficient Blue Thermally Activated Delayed Fluorescence Emitters Based on Multi-Donor Modified Oxygen-Bridged Boron Acceptor." Molecules 27, no. 13 (2022): 4048. http://dx.doi.org/10.3390/molecules27134048.

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The employment of thermally activated delayed fluorescence (TADF) emitters is one of the most promising ways to realize the external quantum efficiency (EQE) of over 25% for organic light-emitting diodes (OLEDs). In addition, the TADF emitter based on oxygen-bridged boron (BO) fragment can maintain blue emission with high color purity. Herein, we constructed two blue TADF emitters, 3TBO and 5TBO, for OLEDs application. Both emitters consist of three donors linked at the oxygen-bridged boron acceptor. OLED devices based on 3TBO and 5TBO exhibited both high excellent device efficiency and high c

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Yi, Jian-Peng, Li Zhao, Weidong Xu, Cheng-Fang Liu, Wen-Yong Lai, and Wei Huang. "Pyrene-capped starburst emitters as gain media for organic lasers: design, synthesis, and stabilized lasing properties." Journal of Materials Chemistry C 4, no. 32 (2016): 7546–53. http://dx.doi.org/10.1039/c6tc01606e.

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Yang, Zhihai, Simin Jiang, Deli Li, Keyan Bai, and Shi-Jian Su. "45‐1: Invited Paper: High‐Performance Narrowband Emitters for Stable Organic Light‐emitting Diodes with Reduced Efficiency Roll‐Off." SID Symposium Digest of Technical Papers 55, S1 (2024): 393–96. http://dx.doi.org/10.1002/sdtp.17091.

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Narrowband organic emitters are promising for their potential applications in wide‐color gamut and high‐resolution displays. Multiple resonance (MR) thermally activated delayed fluorescence (TADF) emitters are flourishing because of their attractive narrow emission bandwidth and excellent device performance. In this work, a series of MR‐TADF emitters embedded with sulfur, sulfone, and carbonyl have been developed, and their intrinsic effects on the exciton dynamics like intersystem crossing rate (kISC) and reverse intersystem crossing rate (kRISC) and full width at half maximum are systematica

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14

Jung, Hyuck, Duck-Jin Lee, Hyun-Tae Chun, Nam-Je Koh, Young Rae Cho, and Dong-Gu Lee. "Carbon Nanotube Field Emitters for Display Applications Using Screen Printing." Materials Science Forum 475-479 (January 2005): 1889–92. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.1889.

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In this study, a 10"-sized panel with novel tetrode structure was tried to prevent broadening of electrons emitted from CNTs. The structure of the novel tetrode is composed of CNT emitters on a cathode electrode, a gate electrode, an extracting electrode coated on the top of a hopping electron spacer (HES), and an anode. HES contains funnel-shaped holes whose inner surfaces are coated with MgO. Electrons extracted through the gate are collected inside the funnel-shaped holes and hop along the hole surface to the top extracting electrode. The effects of HES on emission characteristics of field

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15

Cekaviciute, Monika, Aina Petrauskaite, Sohrab Nasiri, et al. "Towards Blue AIE/AIEE: Synthesis and Applications in OLEDs of Tetra-/Triphenylethenyl Substituted 9,9-Dimethylacridine Derivatives." Molecules 25, no. 3 (2020): 445. http://dx.doi.org/10.3390/molecules25030445.

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Aiming to design blue fluorescent emitters with high photoluminescence quantum yields in solid-state, nitrogen-containing heteroaromatic 9,9-dimethylacridine was refined by tetraphenylethene and triphenylethene. Six tetra-/triphenylethene-substituted 9,9-dimethylacridines were synthesized by the Buchwald-Hartwig method with relatively high yields. Showing effects of substitution patterns, all emitters demonstrated high fluorescence quantum yields of 26–53% in non-doped films and 52–88% in doped films due to the aggregation induced/enhanced emission (AIE/AIEE) phenomena. In solid-state, the emi

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Jiang, Chenglin, Jingsheng Miao, Danwen Zhang, Zhenhua Wen, Chuluo Yang та Kai Li. "Acceptor-Donor-Acceptor π-Stacking Boosts Intramolecular Through-Space Charge Transfer towards Efficient Red TADF and High-Performance OLEDs". Research 2022 (25 червня 2022): 1–12. http://dx.doi.org/10.34133/2022/9892802.

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Organic push-pull systems featuring through-space charge transfer (TSCT) excited states have been disclosed to be capable of exhibiting thermally activated delayed fluorescence (TADF), but to realize high-efficiency long-wavelength emission still remains a challenge. Herein, we report a series of strongly emissive orange-red and red TSCT-TADF emitters having (quasi)planar and rigid donor and acceptor segments which are placed in close proximity and orientated in a cofacial manner. Emission maxima (λem) of 594−599 nm with photoluminescence quantum yields (PLQYs) of up to 91% and delayed fluores

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ZOU Wen-jing, ZHAO Yu-kang, WU You-zhi, and ZHANG Cai-rong. "White Organic Light-emitting Devices Based on Phosphor-sensitized Fluorescence." Acta Physica Sinica 74, no. 2 (2025): 0. https://doi.org/10.7498/aps.74.20241294.

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Although phosphorescent organic light-emitting diodes can have 100% internal quantum efficiency (IQE), the IQE usually roll-off at high current densities due to triplet-triplet annihilation. Phosphor-sensitized fluorescence can realize the energy transfer between phosphorescent and fluorescent emitters, and can used to suppress the eﬃciency roll-oﬀ and tune the color of the device. Based on this consideration, white emission including different colors of phosphorescent and fluorescent emitters can be expected. Herein, Phosphor-sensitized fluorescent White organic light-emitting devices (WOLED)

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18

Park, Jeong Yong, Gyeong Seok Lee, and Yun-Hi Kim. "45‐1: Invited Paper: Design Strategies for NIR Emitting Materials." SID Symposium Digest of Technical Papers 55, no. 1 (2024): 595–98. http://dx.doi.org/10.1002/sdtp.17594.

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The development of OLED materials by molecular design is important for high performance organic light emitting diode because tailoring the molecular structures can dramatically tune the properties such as efficiency, color, stability of device. Near‐infrared organic light‐emitting diodes (NIR OLEDs) with heavy metals or TADF materials are regularly reported due to the advantages of their various applications in healthcare services, veil authentication, and night vision displays. In this paper, we are summarized the collection of innovative organic near‐infrared (NIR) emitters which is crucial

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19

Wan, Danrui, Jianping Zhou, Guoyun Meng, et al. "Peripheral carbazole units-decorated MR emitter containing B−N covalent bond for highly efficient green OLEDs with low roll-off." Journal of Semiconductors 45, no. 8 (2024): 082402. http://dx.doi.org/10.1088/1674-4926/24040008.

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Abstract Boron−nitrogen doped multiple resonance (BN-MR) emitters, characterized by B−N covalent bonds, offer distinctive advantages as pivotal building blocks for facile access to novel MR emitters featuring narrowband spectra and high efficiency. However, there remains a scarcity of exploration concerning synthetic methods and structural derivations to expand the library of novel BN-MR emitters. Herein, we present the synthesis of a BN-MR emitter, tCz[B−N]N, through a one-pot borylation reaction directed by the amine group, achieving an impressive yield of 94%. The emitter is decorated by in

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20

Kim, Cho Long, Jinhoon Jeong, Ho Jin Jang, et al. "Purely organic phosphorescent organic light emitting diodes using alkyl modified phenoselenazine." Journal of Materials Chemistry C 9, no. 26 (2021): 8233–38. http://dx.doi.org/10.1039/d1tc01741a.

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Li, Guijie, Feng Zhan, Weiwei Lou, et al. "Efficient deep-blue organic light-emitting diodes employing difluoroboron-enabled thermally activated delayed fluorescence emitters." Journal of Materials Chemistry C 8, no. 48 (2020): 17464–73. http://dx.doi.org/10.1039/d0tc04162a.

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The design and development of efficient emitters for deep-blue OLED with CIE<sub>y</sub> < 0.10 remains a challenge. A new D–π–A-BF<sub>2</sub>-type TADF emitter BF<sub>2</sub>-DMCz was developed, and the BF<sub>2</sub>-DMCz-doped deep-blue OLED achieved a peak EQE of 8.4% with CIE coordinates of (0.149, 0.083).

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Belton, C. R., G. Itskos, G. Heliotis, et al. "New light from hybrid inorganic–organic emitters." Journal of Physics D: Applied Physics 41, no. 9 (2008): 094006. http://dx.doi.org/10.1088/0022-3727/41/9/094006.

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Chiu, Nan-Fu, Teng-Yi Huang, Chun-Chuan Kuo, Chii-Wann Lin, and Jiun-Haw Lee. "Organic-based plasmonic emitters for sensing applications." Applied Optics 52, no. 7 (2013): 1383. http://dx.doi.org/10.1364/ao.52.001383.

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Falcaro, Paolo, and Shuhei Furukawa. "Doping Light Emitters into Metal-Organic Frameworks." Angewandte Chemie International Edition 51, no. 34 (2012): 8431–33. http://dx.doi.org/10.1002/anie.201203719.

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Chen, Dongyang, and Eli Zysman-Colman. "Exploring the possibility of using fluorine-involved non-conjugated electron-withdrawing groups for thermally activated delayed fluorescence emitters by TD-DFT calculation." Beilstein Journal of Organic Chemistry 17 (January 21, 2021): 210–23. http://dx.doi.org/10.3762/bjoc.17.21.

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The trifluoromethyl group has been previously explored as a non-conjugated electron-withdrawing group in donor–acceptor thermally activated delayed fluorescence (TADF) emitters. In the present study, we investigate computationally the potential of other fluorine-containing acceptors, trifluoromethoxy (OCF3), trifluoromethylthio (SCF3), and pentafluorosulfanyl (SF5), within two families of donor–acceptor TADF emitters. Time-dependent density functional theory calculations indicate that when only two ortho-disposed carbazole donors are used (Type I molecules), the lowest-lying triplet state poss

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Braveenth, Ramanaskanda, and Kyu Yun Chai. "Triazine-Acceptor-Based Green Thermally Activated Delayed Fluorescence Materials for Organic Light-Emitting Diodes." Materials 12, no. 16 (2019): 2646. http://dx.doi.org/10.3390/ma12162646.

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High-efficiency thermally activated delayed fluorescence (TADF) is leading the third-generation technology of organic light-emitting diodes (OLEDs). TADF emitters are designed and synthesized using inexpensive organic donor and acceptor derivatives. TADF emitters are a potential candidate for next-generation display technology when compared with metal-complex-based phosphorescent dopants. Many studies are being conducted to enhance the external quantum efficiencies (EQEs) and photoluminescent quantum yield of green TADF devices. Blue TADF reached an EQE of over 35% with the support of suitable

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Wong, Michael Y., Maria-Grazia La-Placa, Antonio Pertegas, Henk J. Bolink, and Eli Zysman-Colman. "Deep-blue thermally activated delayed fluorescence (TADF) emitters for light-emitting electrochemical cells (LEECs)." Journal of Materials Chemistry C 5, no. 7 (2017): 1699–705. http://dx.doi.org/10.1039/c6tc04821h.

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Two cationic deep blue thermally activated delayed fluorescence (TADF) emitters (imCzDPS and imDPADPS) were designed and synthesized as small molecule organic emitters for light-emitting electrochemical cell (LEEC) devices.

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Li, Guang, Juewen Zhao, Dan Zhang, et al. "Mechanochromic asymmetric sulfone derivatives for use in efficient blue organic light-emitting diodes." Journal of Materials Chemistry C 4, no. 37 (2016): 8787–94. http://dx.doi.org/10.1039/c6tc02917e.

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Chai, Danyang, Yang Zou, Yepeng Xiang, et al. "Fused twin-acridine scaffolds as electron donors for thermally activated delayed fluorescence emitters: controllable TADF behavior by methyl substitution." Chemical Communications 55, no. 100 (2019): 15125–28. http://dx.doi.org/10.1039/c9cc08679j.

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Fused twin-acridine scaffolds of TMQAC and MeTMQAC were designed as novel donors to construct new organic emitters. TMQAC-based emitters exhibited TADF features, high PLQYs and high electroluminescence performances.

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Alberoni, Chiara, Giulio Pavan, Thomas Scattolin, and Alessandro Aliprandi. "Critical Aspects and Challenges in the Design of Small Molecules for Electrochemiluminescence (ECL) Application." ChemPlusChem, April 30, 2024. http://dx.doi.org/10.1002/cplu.202400142.

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Electrochemiluminescence (ECL) has gained renewed interest due to the strong parallel development of luminophores in the field of organic light emitting diodes (OLEDs) with which this technique shares several aspects. In this prospective review we discuss the most relevant advances of the past 15 years in the study of organic and organometallic compounds as ECL emitters, by dividing them in three different classes: i) fluorescent emitters, ii) phosphorescent emitters and iii) Thermally Activated Delayed Fluorescence (TADF) emitters; then, water‐soluble organic luminophore will be also discusse

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Kim, Eungdo, Junha Park, Mieun Jun, et al. "Highly efficient and stable deep-blue organic light-emitting diode using phosphor-sensitized thermally activated delayed fluorescence." Science Advances 8, no. 41 (2022). http://dx.doi.org/10.1126/sciadv.abq1641.

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Phosphorescent and thermally activated delayed fluorescence (TADF) blue organic light-emitting diodes (OLEDs) have been developed to overcome the low efficiency of fluorescent OLEDs. However, device instability, originating from triplet excitons and polarons, limits blue OLED applications. Here, we develop a phosphor-sensitized TADF emission system with TADF emitters to achieve high efficiency and long operational lifetime. Peripheral carbazole moieties are introduced in conventional multi-resonance–type emitters containing one boron atom. The triplet exciton density of the TADF emitter is red

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Rosenow, Th C., S. Olthof, S. Reineke, B. Lüssem, and K. Leo. "Four color stacked white organic light-emitting diodes utilizing the concept of triplet harvesting." MRS Proceedings 1286 (2011). http://dx.doi.org/10.1557/opl.2011.3.

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ABSTRACTOrganic light-emitting diodes (OLEDs) are developing into a competitive alternative to conventional light sources. Nevertheless, OLEDs need further improvement in terms of efficiency and color rendering for lighting applications. Fluorescent blue emitters allow deep blue emission and high stability, while phosphorescent blue emitter still suffer from insufficient stability. The concept of triplet harvesting is the key for achieving internal quantum efficiencies up to 100 % and simultaneously benefiting from the advantages of fluorescent blue emitters. Here, we present a stacked OLED co

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Fiorani, Andrea, Marinella Difonzo, Fabio Rizzo, and Giovanni Valenti. "Versatile electrochemiluminescent organic emitters." Current Opinion in Electrochemistry, April 2022, 100998. http://dx.doi.org/10.1016/j.coelec.2022.100998.

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Kang, Jihoon, Ha Lim Lee, Soon Ok Jeon, et al. "Spin‐Flip‐Restricted Multiple‐Resonance Emitters for Extended Device Lifetime in Indolocarbazole‐Based Blue Organic Light‐Emitting Diodes." Advanced Science, August 29, 2024. http://dx.doi.org/10.1002/advs.202405604.

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AbstractIn this study, a multiple‐resonance (MR) core structure is developed with a spin‐flip‐restricted emission mechanism based on a fused indolo[3,2,1‐jk]carbazole (ICz) framework as emitters to improve the lifetime of blue organic light‐emitting diodes. The molecular skeleton modulation approach applied to the conjugated π‐system effectively stabilizes the triplet energy of the fused ICz emitters and narrows the full‐width‐at‐half maximum (<20 nm). In addition, the emitters exhibit higher exciton stability than conventional boron‐based MR emitters. The fused ICz‐based blue fluorescent d

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Reising, Donald R., Joshua H. Tyler, Mohamed K. M. Fadul, Matthew R. Hilling, and T. Daniel Loveless. "Improved RF Fingerprint-based Identity Verification in the Presence of an SEI Mimicking Adversary." Journal of Cyber Security and Mobility, September 3, 2024, 887–916. http://dx.doi.org/10.13052/jcsm2245-1439.1354.

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Specific Emitter Identification (SEI) is advantageous for its ability to passively identify emitters by exploiting distinct, unique, and organic features unintentionally imparted upon every signal during formation and transmission. These features are attributed to the slight variations and imperfections in the Radio Frequency (RF) front end; thus, SEI is being proposed as a physical layer security technique. Most SEI work assumes the targeted emitter is a passive source with immutable and difficult-to-mimic signal features. However, Software-Defined Radio (SDR) proliferation and Deep Learning

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Yuan, Wenbo, Qian Jin, Mingxu Du, Lian Duan, and Yuewei Zhang. "Tailoring Ultra‐Narrowband Tetraborylated Multiple Resonance Emitter for High‐Performance Blue OLED." Advanced Materials, October 10, 2024. http://dx.doi.org/10.1002/adma.202410096.

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AbstractUltra‐narrowband multiple resonance (MR) emitters are a key component in the fabrication of highly efficient and stable blue organic light‐emitting diodes (OLEDs). To explore the theoretical boundaries of wavelength and full width at half maximum (FWHM) in blue emitters, the currently narrowest boron‐based MR emitter is carefully designed by integrating the superior v‐DABNA and BBCz‐DB structures under the auspices of the ingenious short‐range charge‐transfer region regulation strategy. The target tetraboron compound TB‐PB demonstrates a blue emission with an emission maximum of 473 nm

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Adranno, Brando, Veronica Paterlini, Volodymyr Smetana, Guillaume Bousrez, Alexander Ovchinnikov, and Anja-Verena Mudring. "Enhanced stability and complex phase behaviour of organic-inorganic green-emitting ionic manganese halides." Dalton Transactions, 2023. http://dx.doi.org/10.1039/d2dt03817j.

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Light-emitting materials based on earth-abundant metals such as manganese hold great promises as emitters for organic lighting devices. In order to bring such emitter materials to application and in particular...

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Jiang, He, Jibiao Jin, and Wai‐Yeung Wong. "High‐Performance Multi‐Resonance Thermally Activated Delayed Fluorescence Emitters for Narrowband Organic Light‐Emitting Diodes." Advanced Functional Materials, August 7, 2023. http://dx.doi.org/10.1002/adfm.202306880.

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AbstractMulti‐resonance thermally activated delayed fluorescence (MR‐TADF) emitters have drawn considerable attention because of their remarkable optoelectronic properties of high emission efficiency and narrow emission profile, and represent an active subject of cutting‐edge research in the organic electroluminescence (EL). However, the slow reverse intersystem crossing (RISC) rate of MR‐TADF emitter caused by the large energy gap (ΔEST) and small spin‐orbit coupling (SOC) matrix elements between the singlet and triplet excited states limits their further development in organic EL devices. Cu

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Jacob, Jesni M., and Mahesh Kumar Ravva. "Impact of Surrounding Environment on Hot‐Exciton based Organic Emitters for TADF Applications." ChemPhotoChem, April 18, 2024. http://dx.doi.org/10.1002/cptc.202400073.

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Understanding thermally activated delayed fluorescence (TADF) in solid‐state environments is crucial for practical applications. However, limited research focuses on how the medium affects TADF properties of hot‐exciton‐based emitters. In our study, we calculated and compared reverse intersystem crossing, radiative, and non‐radiative decay rates of TADF emitters in gas, solvent, and solid phases. The designed emitters have a donor‐acceptor‐donor (D‐A‐D) structure, with donors such as triphenylamine (TPA) and diphenylamine thiophene (ThPA), combined with acceptors such as benzothiadiazole (BT),

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Dubbini, Matteo, Federico Bonvini, Lorenzo Savi, and Francesco Di Maiolo. "Turning on Organic Radical Emitters." Journal of Physical Chemistry C, October 17, 2024. http://dx.doi.org/10.1021/acs.jpcc.4c04362.

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"Organic light emitters: Star quality." NPG Asia Materials, March 3, 2009. http://dx.doi.org/10.1038/asiamat.2009.146.

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Jacob, Jesni M., Pralok K. Samanta, and Mahesh kumar Ravva. "Computational Design of Efficient Near-Infrared TADF Emitters with Hot-exciton Characteristics." New Journal of Chemistry, 2023. http://dx.doi.org/10.1039/d3nj01955a.

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Developing near-infrared (NIR) TADF emitters is challenging due to the inherent energy gap law. In this work, we designed a set of twelve donor-acceptor1-acceptor2 (D-A1-A2) type NIR pure organic emitter...

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Thakur, Kalyani, Bas van der Zee, Oskar Sachnik, et al. "Effect of tert‐Butylation on the Photophysics of Thermally Activated Delayed Fluorescence Emitters." Advanced Photonics Research, June 19, 2024. http://dx.doi.org/10.1002/adpr.202400022.

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Thermally activated delayed fluorescence (TADF) emitters potentially can provide organic light‐emitting diodes with 100% internal quantum efficiency by harvesting triplet excitons. Generally, TADF emitters are small molecules that are not applicable for solution processability. The addition of tert‐butyl groups to the periphery of TADF emitters has proven to improve their solubility in various organic solvents, reduce aggregation‐induced quenching, and enhance the photoluminescence quantum yield (PLQY). This article studies the photophysical influence of the tert‐butyl group attached to an emi

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Jiang, Zuo-Quan, Rui-Hong Liu, Zi-Qi Feng, et al. "Integration of Through‐Space Conjugation of Adjacent Arene with Nitrogen/Carbonyl Framework for Narrowband Emission." Angewandte Chemie International Edition, February 19, 2025. https://doi.org/10.1002/anie.202424950.

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Organic luminescent materials featuring noncovalent through‐space conjugation (TSC) have attracted considerable attention. However, the presence of multiple vibrational energy levels and weak spatial electron delocalization typically results in broad emission peaks for TSC‐based emitters, significantly impeding their extensive application in optoelectronic technologies. Herein, two TSC emitters, TSFQ‐TRZ and TSFQ‐Ph, were synthesized by integrating a fused nitrogen/carbonyl skeleton with adjacent arene 2,4,6‐triphenyl‐1,3,5‐triazine (TPTRZ) and phenyl group segments, through a rigid spiro spac

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Jiang, Zuo-Quan, Rui-Hong Liu, Zi-Qi Feng, et al. "Integration of Through‐Space Conjugation of Adjacent Arene with Nitrogen/Carbonyl Framework for Narrowband Emission." Angewandte Chemie, February 19, 2025. https://doi.org/10.1002/ange.202424950.

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Organic luminescent materials featuring noncovalent through‐space conjugation (TSC) have attracted considerable attention. However, the presence of multiple vibrational energy levels and weak spatial electron delocalization typically results in broad emission peaks for TSC‐based emitters, significantly impeding their extensive application in optoelectronic technologies. Herein, two TSC emitters, TSFQ‐TRZ and TSFQ‐Ph, were synthesized by integrating a fused nitrogen/carbonyl skeleton with adjacent arene 2,4,6‐triphenyl‐1,3,5‐triazine (TPTRZ) and phenyl group segments, through a rigid spiro spac

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Zeng, Jiajie, Shaoxin Song, Yan Fu, Xiaoluo Peng, Ben Zhong Tang, and Zujin Zhao. "Purely organic room-temperature phosphorescence sensitizers for highly efficient hyperfluorescence OLEDs." Science Advances 11, no. 12 (2025). https://doi.org/10.1126/sciadv.adt7899.

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Multiresonance thermally activated delayed fluorescence (MR-TADF) emitters are promising candidates for organic light-emitting diodes (OLEDs) with high color quality. However, in most cases, noble metal–containing phosphors are required as sensitizers for MR-TADF emitters to improve their electroluminescence (EL) performances, which may lead to high cost and environmental pollution. Herein, an efficient purely organic room-temperature phosphorescence (RTP) material, 3,2-PIC-TXT, with fast phosphorescence radiation is developed. It not only exhibits impressive EL performances as an emitter with

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Song, Yongjun, Ke Zhang, Pingping Wang, Yuan Cao, and Lei He. "Simultaneously Improving Radiative Decay and Reverse Intersystem Crossing in Space‐Confined Through‐Space Charge‐Transfer (TSCT) Emitter by Strong Intermolecular TSCT Enabled by a Planar Donor." Advanced Functional Materials 35, no. 1 (2024). https://doi.org/10.1002/adfm.202411957.

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AbstractSimultaneously improving radiative decay and reverse intersystem crossing (RISC) of through‐space charge‐transfer (TSCT) thermally‐activated delayed fluorescence (TADF) emitters has remained a challenge. Here, space‐confined TSCT‐TADF emitters are developed with a planar indolo[3,2,1‐kl]phenoxazine donor, a spiro‐carbon‐fixed benzophenone acceptor, and a fluorene (for 1) or xanthene (for 2) bridge. Close, cofacial donor/acceptor alignments and efficient intramolecular TSCT have been observed for both emitters. Intriguingly, emitter 1 exhibits an intermolecular donor/acceptor interactio

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He, Zhaoming, Hai Bi, Baoyan Liang, Zhiqiang Li, Heming Zhang, and Yue Wang. "Frontier molecular orbital weighted model based networks for revealing organic delayed fluorescence efficiency." Light: Science & Applications 14, no. 1 (2025). https://doi.org/10.1038/s41377-024-01713-w.

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Abstract Free of noble-metal and high in unit internal quantum efficiency of electroluminescence, organic molecules with thermally activated delayed fluorescence (TADF) features pose the potential to substitute metal-based phosphorescence materials and serve as the new-generation emitters for the mass production of organic light emitting diodes (OLEDs) display. Predicting the function of TADF emitters beyond classic chemical synthesis and material characterization experiments remains a great challenge. The advances in deep learning (DL) based artificial intelligence (AI) offer an exciting oppo

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Yan, Yu, Chengfang Liu, Jianzhong Fan, et al. "Smart Responsive Organic Emitters: Intrinsic Mechanisms and Versatile Applications." Advanced Optical Materials, January 31, 2024. http://dx.doi.org/10.1002/adom.202302935.

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AbstractSmart responsive organic emitters, which exhibit tunable emission properties in response to external stimuli, can serve as a new generation of intelligent optoelectronic materials because of their versatile applications, such as multicolor displays, information encryption, visual sensing, and matter detection. In recent years, significant advancements have been made in the development of smart responsive organic emitters. However, there is still a lack of a systematic review that provides a comprehensive insight into smart responsive organic emitters from the perspectives of intrinsic

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Song, Yongjun, Ke Zhang, Yibo Li, Yan Shu, Yue Xiu та Lei He. "Multi‐π‐Stacked Through‐Space Charge‐Transfer Emitters with Accelerated Radiative Decay for High‐Efficiency Organic Light‐Emitting Diodes with Suppressed Efficiency Roll‐Offs". Advanced Functional Materials, 7 січня 2025. https://doi.org/10.1002/adfm.202422927.

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AbstractThrough‐space charge‐transfer (TSCT) thermally‐activated delayed fluorescence (TADF) emitters have been extensively explored for organic light‐emitting diodes (OLEDs), but their low radiative decay rates (kr,s) have remained a formidable obstacle to enhancement of luminescent efficiency (ФPL) and suppression of efficiency roll‐off of the OLED. Here, multi‐π‐stacked TSCT‐TADF emitters with accelerated radiative decay are developed with a 3D [fixed acceptor]/donor/[fixed acceptor] structure formed on two individual fluorene bridges. Single‐crystal structures and theoretical calculations

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