Log in

Relevant bibliographies by topics / White, OLED, high efficiency / Dissertations / Theses

To see the other types of publications on this topic, follow the link: White, OLED, high efficiency.

Dissertations / Theses on the topic 'White, OLED, high efficiency'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'White, OLED, high efficiency.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Schwartz, Gregor. "Novel Concepts for High-Efficiency White Organic Light-Emitting Diodes." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1217967185179-03950.

Full text

Abstract:

Diese Arbeit behandelt neue Konzepte zur Realisierung hocheffizienter Weißlicht emittierender organischer Leuchtdioden (OLEDs), wobei blaue fluoreszierende Emitter mit grünen und roten phosphoreszierenden Emittern kombiniert werden. Bisherige Ansätze zur Erreichung höchster Quantenausbeuten basieren auf der ausschließlichen Verwendung phosphoreszierender Emitter, da diese prinzipiell 100% der elektrisch erzeugten Exzitonen in Licht umwandeln können. Allerdings sind speziell OLEDs mit phosphoreszierenden tiefblauen Emittern heutzutage nach wie vor nicht langzeitstabil. Andererseits gibt es zwar

APA, Harvard, Vancouver, ISO, and other styles

2

Schwartz, Gregor. "Novel Concepts for High-Efficiency White Organic Light-Emitting Diodes." Doctoral thesis, Technische Universität Dresden, 2007. https://tud.qucosa.de/id/qucosa%3A23655.

Full text

Abstract:

Diese Arbeit behandelt neue Konzepte zur Realisierung hocheffizienter Weißlicht emittierender organischer Leuchtdioden (OLEDs), wobei blaue fluoreszierende Emitter mit grünen und roten phosphoreszierenden Emittern kombiniert werden. Bisherige Ansätze zur Erreichung höchster Quantenausbeuten basieren auf der ausschließlichen Verwendung phosphoreszierender Emitter, da diese prinzipiell 100% der elektrisch erzeugten Exzitonen in Licht umwandeln können. Allerdings sind speziell OLEDs mit phosphoreszierenden tiefblauen Emittern heutzutage nach wie vor nicht langzeitstabil. Andererseits gibt es zwar

APA, Harvard, Vancouver, ISO, and other styles

3

Reineke, Sebastian. "Controlling Excitons: Concepts for Phosphorescent Organic LEDs at High Brightness." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-39520.

Full text

Abstract:

This work focusses on the high brightness performance of phosphorescent organic light-emitting diodes (OLEDs). The use of phosphorescent emitter molecules in OLEDs is essential to realize internal electron-photon conversion efficiencies of 100 %. However, due to their molecular nature, the excited triplet states have orders of magnitude longer time constants compared to their fluorescent counterparts which, in turn, strongly increases the probability of bimolecular annihilation. As a consequence, the efficiencies of phosphorescent OLEDs decline at high brightness – an effect known as efficienc

APA, Harvard, Vancouver, ISO, and other styles

4

WEI, Qiang. "Synthesis of Advanced Optical Polymers and Their Applications in Improving OLEDs’ Efficiency." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-210458.

Full text

Abstract:

Over the last three decades, the performance of OLEDs has been improved rapidly, however, as an important assessment for OLED, the EQE data are still quite low. As outlined in the theoretical background, the EQE is the product of out-coupling efficiency and internal quantum efficiency (IQE). Therefore, this thesis focuses on designing two types of polymers with different optical functionalities, to increase the EQE addressing the two aforementioned determining factors. Thus, the first part of the thesis addresses the light out-coupling efficiency in OLED devices. Here high refractive index (

APA, Harvard, Vancouver, ISO, and other styles

5

Purandare, Sumit. "Highly Efficient Phosphorescent Organic Light Emitting Diodes on Cellulose." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1396532894.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Smith, Richard M. "Fabrication and characterization of high efficiency III-nitride/organic hybrid nano-structures for solid state white lighting." Thesis, University of Sheffield, 2013. http://etheses.whiterose.ac.uk/5083/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Zhang, Shuai. "Chickens Selected for High Body Weight Show Relative Impairment in Fatty Acid Oxidation Efficiency and Metabolic Flexibility in Skeletal Muscle and White Adipose Tissue." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/24536.

Full text

Abstract:

The ability to adapt fuel usage to nutrient availability is termed metabolic flexibility, and is influenced by activity of the pyruvate dehydrogenase complex (PDC). The Virginia lines of chickens are a unique model of anorexia and obesity that have resulted from 56 generations of artificial selection for high (HWS) or low (LWS) juvenile body weight. We hypothesized that hyperphagia and obesity in juvenile HWS chickens are associated with altered fatty acid oxidation efficiency and metabolic flexibility in tissues associated with energy sensing and storage, and relative cellular hypertrophy in

APA, Harvard, Vancouver, ISO, and other styles

8

Chen, Chang-Hsuan, and 陳昌炫. "Construction of high efficiency non-doped deep-blue and white OLED." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/f457v7.

Full text

Abstract:

碩士<br>國立臺灣海洋大學<br>光電科學研究所<br>103<br>In first part of the thesis, we describe two novel blue emission materials based on phenanthroimidazole/carbarzole (PBC and PBnC). Phenanthroimidazole is a highly efficient violet-blue chromophore and used as core structures for deep blue emitter. OLEDs using PBC as emitting layer with an EQE of 6.6% and deep blue emission (CIEy < 0.06). By using transient electroluminescence measurements, the devices observed significant delayed fluorescence via triplet–triplet annihilation. The additional effect of extra singlet excitons form the basis for the improved EQE

APA, Harvard, Vancouver, ISO, and other styles

9

Li, Jian-Feng, and 李建鋒. "An Investigation of High Efficiency White Organic Light-Emitting Diode (OLED) with Iridium Complexes." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/00136557088588459141.

Full text

Abstract:

博士<br>國立中正大學<br>電機工程所<br>95<br>Owing to the urgent marketing requirement in LCD backlight and illumination light sources fabricated by white organic light emitting diode (OLED), more studies engaged in the luminescent performance, driving voltage, contrast and color purity of white OLED are still needed. Therefore, the main purpose of this doctoral thesis is to improve the optoelectronic properties of white OLED with iridium complexes and accomplish the optimal design for fabricating the structured white OLED as well as its optoelectronic characteristics analyses. We reported an investigation

APA, Harvard, Vancouver, ISO, and other styles

10

Ho, Hung-Wei, and 何弘偉. "High efficiency Red, Green and Blue light generated by white OLED with microcavity structure." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/58482408655181742105.

Full text

Abstract:

碩士<br>國立成功大學<br>光電科學與工程研究所<br>96<br>Organic light-emitting diodes with microcavity structure is a new structure device. Red、Green and Blue light generated by white OLED with microcavity structure can reduce loss and improve the pure level of three primary color. In general, the microcavity structure was made up of two metal electrodes, the energy loss is higher as a result of the higher absorption coefficient. This research uses distributed bragg reflector to take the place of metal reflector is because of distributed bragg reflector is made up of dielectric material which has lower absorption

APA, Harvard, Vancouver, ISO, and other styles

11

Chou, Yi-Chieh, and 周詣傑. "High Color Rendering, High-Efficiency White OLEDs with Five Emitters." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/23296068848084173962.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Wu, Chun-chih, and 吳峻志. "The study of high efficiency red OLEDs and high efficiency single emitting layer broadband white OLEDs." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/9945s4.

Full text

Abstract:

碩士<br>國立中山大學<br>光電工程研究所<br>96<br>This research includes two parts as mentioned: (I) High efficiency red organic electroluminescent devices and (II) High efficiency white organic electroluminescent devices with broadband EL emission spectrum based on a single emitting layer. In part (I), we fabricated the high efficiency red organic electroluminescent devices incorporating 1,3,5-Tri(1-pyrenyl)benzene(TPB3) as the host material and 4-(dicyanomethylene)-2-tert-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) as the dopant. The highly efficient energy transfer arose as a result of

APA, Harvard, Vancouver, ISO, and other styles

13

Reineke, Sebastian. "Controlling Excitons: Concepts for Phosphorescent Organic LEDs at High Brightness." Doctoral thesis, 2009. https://tud.qucosa.de/id/qucosa%3A25358.

Full text

Abstract:

This work focusses on the high brightness performance of phosphorescent organic light-emitting diodes (OLEDs). The use of phosphorescent emitter molecules in OLEDs is essential to realize internal electron-photon conversion efficiencies of 100 %. However, due to their molecular nature, the excited triplet states have orders of magnitude longer time constants compared to their fluorescent counterparts which, in turn, strongly increases the probability of bimolecular annihilation. As a consequence, the efficiencies of phosphorescent OLEDs decline at high brightness – an effect known as efficienc

APA, Harvard, Vancouver, ISO, and other styles

14

Chiang, Pin-Yi, and 江品毅. "High efficiency and low roll-off OLED utilizing exciplex." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/rf4tf9.

Full text

Abstract:

碩士<br>國立臺灣海洋大學<br>光電科學研究所<br>103<br>Exciplex formation via intermolecular charge transfer between electron donors and acceptors has been exploited to markedly enhance the EQE of fluorescent OLEDs. In this thesis, we report a series of exciplex system with a blended structure containing carbazole derivate as an electron donor, and 1,3,5-triazine derivate as an electron acceptor. In first part, we reported blue exciplex device. By fine-tuning device structure, blue OLEDs made using mCP:POT2T as emitter can achieve EQE as high as 10.47% with CIE (0.16,0.29). In the second part, we introduce a spa

APA, Harvard, Vancouver, ISO, and other styles

15

Liu, Yu-Hao, and 劉育豪. "Low Driving Voltage and High Efficiency Blue Phosphorescent OLED." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/76f2e6.

Full text

Abstract:

碩士<br>國立東華大學<br>光電工程學系<br>100<br>In this thesis, we use various oxadiazole small molecular ,there is 2-phenyl-5-(4-(triphenylsilyl)phenyl)-1,3,4-oxadiazole(SiOXD-1)、diphenylbis(4-(5-phenyl-1,3,4-oxadiazol-2-yl)phenyl)silane(SiOXD-2) and 2,5-bis(4-(triphenylsilyl)phenyl)-1,3,4-oxadiazole(DiSiOXD) . Because its wide energy gap can be use as emitting layer(EML) in our organic light-emitting diodes(OLED) . For optimizing the low driving voltage and high efficiency OLED that we compared the three kind OXD materials with dopant FIrpic as EML in various concentration . And change three kind of el

APA, Harvard, Vancouver, ISO, and other styles

16

Chen, Xuan-Fu, and 陳軒甫. "High Color Rendering Index and Chromatic-Stable Tandem White OLED." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/a775d8.

Full text

Abstract:

碩士<br>國立高雄應用科技大學<br>電子工程系碩士班<br>102<br>We demonstrate the electroluminescence (EL) properties of a low power consumption, high efficiency and stability of tandem organic light emitting diode (OLED). Its EL properties were improved by using a charge generation unit (CGU) combining a doped hole transporting layer (HTL) with bipolar transport ability. In addition, the design of a mechanism to align the energy level between the HTL and CGU shows effectively decreasing the operating voltage of the devices.The deposition of a LiF/Al/NPB:HAT-CN CGU in tandem OLED achieves in more than twofold improve

APA, Harvard, Vancouver, ISO, and other styles

17

Tasi, Shing-wan, and 蔡興旺. "The fabrication of high efficiency phosphorescent OLED by Phosphorescent materials." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/81605682367966183524.

Full text

Abstract:

碩士<br>義守大學<br>電子工程學系碩士班<br>93<br>In fluorescent electroluminescent emission, an electron collision in space can produce 25 % for singlet and 75 % for triplet. Because of electron spin forbidden effect, the activated energy of triplet exciton excited from the recombination of electron and hole is all loss for non-radiation. Therefore, it exhibits an upper limit on the emission efficiency by itself. There is not electron spin forbidden effect in phosphorescent electroluminescent emission materials and the emission efficiency of phosphorescent organic light emitting diodes (OLEDs) can be improved

APA, Harvard, Vancouver, ISO, and other styles

18

Lai, Yun-Jr, and 賴昀志. "Improved Current Efficiency of White Hybrid Fluorescent and Phosphorescent OLED with Double-Emission Layers." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/6rqwx7.

Full text

Abstract:

碩士<br>國立虎尾科技大學<br>光電與材料科技研究所<br>100<br>In this study, yellow phosphorescent organic light-emitting diode based on using phosphorescent bipolar host material (EPH-31) and phosphor dopant (EPY-01) was successfully fabricated at first. Through utilizing the thickness of emitting layer (EML), the charge carrier balance was achieved when thickness of EML was 60 nm. The current efficiency of 38.1 cd/A at 20 mA/cm2 can be obtained. After that, phosphorescent hybrid white organic light-emitting diode (HWOLED) was tried to fabricate by adding a fluorescent blue EML to previous yellow EML. But the HWOLE

APA, Harvard, Vancouver, ISO, and other styles

19

Huang, Kuo-Kai, and 黃國凱. "The Study of N-type Dopants to Improve Efficiency White Hybrid Fluorescent and Phosphorescent OLED." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/9646vd.

Full text

Abstract:

碩士<br>國立虎尾科技大學<br>光電與材料科技研究所<br>101<br>In this thesis, the N-type material doped electron transport layer, an intermediate layer of material added to the high HOMO as a hole blocking layer, improve firefly phosphorus mixed type white organic light-emitting diodes luminous efficiency. Firstly, the electron injection study the impact on the OLED element, producing electron-only devices, explore current injection effect, the use of low-energy bands with the characteristics of Al to reduce the hole current, device structures for the Al (200 nm) / ETL / Al (150 nm ), N-type doping material CsI and

APA, Harvard, Vancouver, ISO, and other styles

20

Huang, Xhin-Bi, and 黃顯弼. "Fabrication of high color stability of white OLED by doping with guest dye." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/26941705798002823389.

Full text

Abstract:

碩士<br>國立高雄應用科技大學<br>電子工程系<br>97<br>The white organic light emitting diodes (OLEDs) were fabricated by utilize two kinds of guest materials as emitters. The luminescence stability between white OLEDs was compared and discussed. The guest materials were red DCJTB emitter and yellow Rubrene emitter. We found that when Alq3 was doped with 2.5 wt% of Rubrene, the CIE coordinate of white OLED was considerably stable; when the applied voltage was increased from 9 to 14 V, the CIE coordinates all kept at (0.36, 0.36). Utilizing the energy transfer mechanism, the Rubrene guest gained exciting energy fr

APA, Harvard, Vancouver, ISO, and other styles

21

Ming-Zheng, Dai, and 戴銘政. "High Efficiency Boost Driver for White LED." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/65927445078880841314.

Full text

Abstract:

碩士<br>臺北城市科技大學<br>嵌入式系統產業研發碩士專班<br>100<br>LEDs present many advantages over incandescent light sources including lower energy consumption, light weight, and longer lifetime, etc. It fits the requirements of portable products. And unlike CCFLs, LED-lit monitors contain no mercury, halogen or lead. That makes them safe for the environment when the time comes to recycle them. So the white LED has apparently become the mainstream of backlighting applications in the future. Because of the requirements of complex application, the power consumption is rising. The more energy-saving backlight module

APA, Harvard, Vancouver, ISO, and other styles

22

Schwab, Tobias. "Top-Emitting OLEDs: Improvement of the Light Extraction Efficiency and Optimization of Microcavity Effects for White Emission." Doctoral thesis, 2014. https://tud.qucosa.de/id/qucosa%3A28457.

Full text

Abstract:

In the last decades, investigations of organic light-emitting diodes (OLEDs) have tackled several key challenges of this lighting technology and have brought the electron to photon conversion efficiency close to unity. However, currently only 20% to 30% of the photons can typically be extracted from OLED structures, as total internal reflection traps the major amount of the generated light inside the devices. This work focuses on the optimization of the optical properties of top-emitting OLEDs, in which the emission is directed away from the substrate. In this case, opaque materials, e.g. a

APA, Harvard, Vancouver, ISO, and other styles

23

Qiu, Jacky. "High Efficiency Organic Light Emitting Diodes with MoO3 Doped Hole Transport Layer." Thesis, 2012. http://hdl.handle.net/1807/32652.

Full text

Abstract:

Organic Light Emitting Diodes (OLEDs) are widely viewed as next generation platform for flat panel displays and solid state lighting. Currently, OLED efficiency is not high due to high driving voltage. Molybdenum trioxide (MoO3) is ideal for p-type doping of the wide bandgap organic semiconductor 4,4’-bis-9-carbozyl biphenyl (CBP). With p-type doped CBP layer as Hole Transport Layer (HTL), driving voltage can be significantly reduced. Effective design for doped OLED structure consists of a HTL with doped layer from 20nm to 40nm and MoO3 concentration above 5%, the optimized OLED with doped CB

APA, Harvard, Vancouver, ISO, and other styles

24

Shih, Yi-Lun, and 施羿綸. "Improve the dissolution problem of high efficiency small molecule OLED by blade coating method." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/15613114829867622225.

Full text

Abstract:

碩士<br>國立交通大學<br>物理研究所<br>101<br>The blade coating cause the high efficiency small molecule OLED dissolving the interface between organic layers, this thesis discuss how to observe this situation and the use blade coating process improvement and evaporation process of the component to compare to each other. The first layer ( HTL ) of material is N, N'-bis (naphthalen-1-yl)-N, N'-bis (phenyl)-benzidine ( NPB ), then etching clean boundary by reactive ion etching, and depositing emitting layer by blade coating. Changing the thickness of the HTL, heating conditions, blower conditions, and selecti

APA, Harvard, Vancouver, ISO, and other styles

25

Ming-HuaWu and 吳明樺. "The fabrications of high efficient white-light OLEDs by using organic/inorganic multiple quantum wells." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/74287110376551323111.

Full text

Abstract:

碩士<br>國立成功大學<br>電機工程學系碩博士班<br>98<br>In this thesis, we focused on the fabrication with high efficiency white organic light-emitting diodes (WOLEDs). We adopted two organic materials, 2,3,6,7-Tetrahydro-1,1,7,7,-tetramethyl-1H, 5H,11H-10- (2-benzothiazolyl)quinolizino[9,9a,1gh]coumarin (C545T), 2,2',2" -(1,3,5-Benzinetriyl)-tris(1-phenyl-1-H-benzimidazole) (TPBi), and one inorganic material, NaF , to insert into NPB, respectively, forming the multiple quantum-well-like (MQW) structures consisting of the alternative layer of NPB/C545T/NPB/C545T, NPB/TPBi/NPB/TPBi or NPB/NaF/NPB/NaF. Compared wit

APA, Harvard, Vancouver, ISO, and other styles

26

Kang-Chun, Peng. "High Efficiency and White Light Organic Polymer Light-Emitting Device." 2005. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-1210200519153900.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Peng, Kang-Chun, and 彭康峻. "High Efficiency and White Light Organic Polymer Light-Emitting Device." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/60462900980098411294.

Full text

Abstract:

碩士<br>國立臺灣大學<br>光電工程學研究所<br>94<br>In this thesis, we use triton to modify PEDOT:PSS which is used as the hole injection in our PLED device. Because triton is a kind of interface active solvent, it can improve the adhesion of the interface, and make PEDOT and PSS disperse uniformly in water solution. That can raise the conductivity and help hole-injection capability to improve device efficiency. Then we use a new light-emitting material (P1) as the emitting layer in PLEDs. To improve device performance, we use BCP as the hole blocking layer, Alq3 as the electron transport layer and the new poly

APA, Harvard, Vancouver, ISO, and other styles

28

TUNG, YU-TUNG, and 董育彤. "Research on High-Efficiency Hybrid White Organic Light-Emitting Diodes." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/hm6754.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Yu, Hui-Huan, and 游輝桓. "High-efficiency low-blue-hazard white organic light-emitting diodes." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/2hwdq5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Tseng, Ching-huei, and 曾靖揮. "The study of high efficiency white organic light emitting diodes." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/pygzpq.

Full text

Abstract:

博士<br>國立中山大學<br>電機工程學系研究所<br>95<br>Three subjects on the organic light-emitting diodes (OLEDs) have been studied. First, We inserted a NPB：Alq3 mixed layer between these two NPB and Alq3 layers to decrease the holes mobility and improve the combined efficiency between the holes and electrons. After inserting the NPB：Alq3 layer, the current density of the device( ITO/ MTDATA（5 nm）/ NPB（60-Y）nm）/NPB：Alq3 (Z wt%)(Y nm) / Alq3（60 nm）/ LiF(0.7 nm)/ Al(180 nm)) is decreased obviously. This result suggests that NPB：Alq3 layer could delay the holes mobility. The optimum concentration in our device is

APA, Harvard, Vancouver, ISO, and other styles

31

Hsiao, Chih-Hung, and 蕭智鴻. "Study of High-Efficiency and High-Color-Stability White Organic Light-Emitting Devices." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/09029917031261917763.

Full text

Abstract:

博士<br>國立臺灣大學<br>光電工程學研究所<br>98<br>The core of this doctoral dissertation is based on how to design a suitable and simplified emitting layer (EML) in white organic light emitting devices (WOLED) for implementing phosphorescence-sensitization (chapter 3) and improving device efficiency and color stability (chapter 4). In addition to the steady state measurement such as B-I-V and efficiency performance, transient measurements will be utilized for further specifying the carrier dynamic and emission mechanism in OLEDs (chapter 5). In chapter 3, efficient phosphorescence-sensitization (PS) consistin

APA, Harvard, Vancouver, ISO, and other styles

32

Yeh, Chi-Hung, and 葉啟宏. "High brightness high efficiency blue light and white light Polymer Light-Emitting Diode." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/43357343037708603925.

Full text

Abstract:

碩士<br>國立清華大學<br>光電工程研究所<br>94<br>The fabrication of multilayer polymeric devices has been plagued by serious inter mixing at the interface. There is little progress in the fabrication of polymeric multilayer devices besides chemical synthesis of materials different solubility. A solution-buffer technology was invented in our laboratory previously and multilayer PLEDs with improved, uniformity and longer lifetime was demonstrated. This solution-buffer technology provides a feasible way to fabricate multilayer polymeric devices and enables many useful designs. Extend our previously work on solut

APA, Harvard, Vancouver, ISO, and other styles

33

Yang, Chung-He, and 楊衷核. "Fabrication of High-Efficiency Nano-OLED devices based on Inorganic Quantum Dots and Sol-Gel Process." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/97117255087847032723.

Full text

Abstract:

博士<br>國立交通大學<br>應用化學系所<br>95<br>The goal of this study is aimed to improve the performance of the light emitting diodes by introducing inorganic quantum dots and sol-gel process. In the first part, a new series of sulfide-containing polyfluorene homopolymers and copolymers (PFS, PF1, PF3 and PF4) comprised of aryl bromide and bronic ester moieties were synthesized by Ni(0)-mediated Yamamoto coupling and palladium-catalyzed Suzuki polymerizations. Three other polyfluorenes (PF2, PF5 and PFC6) without sulfur atom in the alkyl side chains were also synthesized by a similar method for comparison p

APA, Harvard, Vancouver, ISO, and other styles

34

Cheng, Wei-Chung, and 鄭惟中. "Fabrication of Double-Doped High Efficiency White Organic Light-Emitting Diodes." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/59711235559257033637.

Full text

Abstract:

碩士<br>義守大學<br>電子工程學系碩士班<br>94<br>In general, FIrpic is used as sensitizer to invert the energy transfer between triplet and singlet. By that, we can get high efficiency organic light-emitting diodes. In this study, we dopanted fluorescent materials of DCM2 in blue phosphorescent emissive layer (CBP : FIrpic), and compare its different characteristics of luminance, efficiency, EL peak and CIE, respectively. We found the external quantum efficiency to find the optical thin film thickness and compare different red fluorescent material. And we found the optical structure is ITO/m-MTDATA(15 nm)

APA, Harvard, Vancouver, ISO, and other styles

35

Anh, Nguyen Doan Quoc, and 阮團國英. "Study of white LED lamps with high CCT, uniform illumination and high optical efficiency." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/72544744677707857699.

Full text

Abstract:

博士<br>國立高雄應用科技大學<br>電機工程系博碩士班<br>103<br>Correlated color temperature uniformity (CCTU) is one of the most important performance factors for white light LEDs. In this dissertation, we propose and demonstrate the improvement of the CCTU in the multi-chip white light LED (MCW-LED) subsequent by adding silicon dioxides (SiO2) into phosphor structures. The experimental results show that the CCT peak to valley (P-V) deviation can thus be reduced about 700 K for an 8500 K MCW-LED. Moreover, we also discuss the performance of the multi-chip white light LED packages with the proposed SiO2 structures.

APA, Harvard, Vancouver, ISO, and other styles

36

Lin, Tzu-Chan, and 林資展. "Effect on Indium Zinc Oxide, Electron Transport and Hole Transport Materials for High Efficiency Blue Phosphorescent OLED." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/grwv7q.

Full text

Abstract:

碩士<br>元智大學<br>光電工程學系<br>104<br>In this thesis, we studied the topic of high high-efficiency blue organic light-emitting diodes (OLEDs) using various hole transport layers (HTLs) and electron transport layers (ETLs) to adjust the carrier balance in the emitting layer. For host materials, hole-tranpsorting material, N,N’-dicarbazolyl-3,5-benzene (mCP), and electron-tranporting material 3-(4-Biphenylyl)-4-phenyl-5- tert-butylphenyl-1,2.4-triazole (TAZ) were employed in this study. Using four ETLs, e.g. TAZ, 1,3,5-tri(m-pyrid-3-yl-phenyl)benzene (TmPyPb), tris(2,4,6-triMethyl-3-(pyridin-3-yl)pheny

APA, Harvard, Vancouver, ISO, and other styles

37

王奕翔. "Develop all solution-process for high efficiency white organic light-emitting diodes." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/11843901118381586222.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Li, Ming-Ruei, and 李明叡. "A High Efficiency Boost White LED Driver with Adaptive Slope Compensation Technique." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/33829565901255363976.

Full text

Abstract:

碩士<br>國立臺灣海洋大學<br>電機工程學系<br>100<br>In recent years, because the gradual rise of global environmental awareness, white light-emitting diodes (LEDs) with advantages of small sizes, less heat, long lives, low power consumption, and not containing mercury, have gradually replaced the flash of camera phone and digital camera, automotive lighting, and backlight of non-light-emitting liquid crystal display. The brightness of LED is dependent on the forward current. A stable forward current is helpful to the operation life. Therefore, how to supply stable power is becoming the most important topic of

APA, Harvard, Vancouver, ISO, and other styles

39

Su, Wen-Lung, and 蘇文龍. "White Light-Emitting Diodes Efficiency Improve Study of High Color Rendering Index." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/74329734854399119837.

Full text

Abstract:

碩士<br>國立中興大學<br>精密工程學系所<br>99<br>For the huge demand of lighting and LCD back light area, high power package is needed fot LED light source with good efficiency and good color rendering index (CRI) larger than 85. The most convenient way is using red and green mixed phosphors stimulated with blue LED chip. However, due to the reach sorption of green light for the red phosphor, the efficiency is low. In this thesis, we propose a layered structure that seperates the green and red phosphors. Because of the index difference in each layer, the light extraction efficiency can be improved by about 5

APA, Harvard, Vancouver, ISO, and other styles

40

LIN, HUNG HSING, and 林宏興. "Fabrication and Characterization of High Efficiency White Phosphorescent Organic Light-Emitting Diodes." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/15189595113119843493.

Full text

Abstract:

碩士<br>長庚大學<br>光電工程研究所<br>98<br>The thesis is divided into two parts, and Part One is the preparation for a series of high-efficiency white OLED devices. The series of white light-emitting layer components are mainly by the phosphorescent materials containing heavy metals. Part Two combines the fluorescence and phosphorescence for the development of hybrid white components. The mixed components of white light-emitting layer of the green and red phosphors contained heavy metals from the materials in which the blue light-emitting layer by a high-efficiency blue fluorescent material has been inclu

APA, Harvard, Vancouver, ISO, and other styles

41

Ma, Jia-Wei, and 馬嘉偉. "Study Forward the Fabrication of High-Efficiency White Organic Light-Emitting Diodes." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/33603939246168210079.

Full text

Abstract:

碩士<br>國立交通大學<br>光電工程系所<br>94<br>We have demonstrated high-efficiency i-i-i three-wavelength WOLEDs with a new orange phosphorescent dopant of Pt complex which produces excimer emission including green, yellow and red region of visible spectrum. A maximum EQE of 10.94%, luminance efficiency of 19.68 cd/A, NTSC ratio of 60.9% and a stable chromaticity with a near constant CIE coordinates under different drive current conditions were achieved. We also demonstrated a high-efficiency two-wavelength and also color stable p-i-n white device with double emitting layer and two blocking layer of TAPC an

APA, Harvard, Vancouver, ISO, and other styles

42

YANG, TSUNG-HENG, and 楊宗衡. "Research on All-Phosphorescent White Organic Light-Emitting Diodes with High-Efficiency and High Color Stability." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/c2ekqa.

Full text

Abstract:

碩士<br>國立雲林科技大學<br>電子工程系<br>105<br>This study was a research on all-phosphorescent white organic light-emitting diodes with high-efficiency and high color stability. We used PET as a flexible and transparent substrate; ITO as anode; PEDOT:PSS as hole injection layer; NPB as hole transporting layer; emission layer material would be host material mCP, blue phosphorescent guest material FIrPic, and red phosphorescent guest material Ir(piq)3 dissolved in toluene and placed on a magnetic stirrer to make the solution evenly, and finally, the solution was placed in a vacuum oven to evaporate the solve

APA, Harvard, Vancouver, ISO, and other styles

43

Schwartz, Gregor [Verfasser]. "Novel concepts for high-efficiency white organic light-emitting diodes / von Gregor Schwartz." 2008. http://d-nb.info/990206130/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Tsou, Lei, and 鄒磊. "Fabrication of high efficiency and color stability in white organic light emitting device." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/03285203392453700164.

Full text

Abstract:

碩士<br>國立成功大學<br>微電子工程研究所碩博士班<br>95<br>In this thesis, we use the co-vaporizing skills in blue organic material TBADN and yellow dyeing organic material Rubrene to achieve high efficiency and color stability white organic light emitting devices (WOLEDs). We also discover high overlapping between emitting photoluminescence of TBDAN and absorption of photoluminescence of Rubrene. That is one of the major reasons to increase the efficiency of WOLEDs. At first, we try to optimize the best blue light emitting device structure whose layer in order as ITO/NPB(70nm)/TBDAN(Xnm)/Alq3(10nm)/LiF(1nm)/Al(15

APA, Harvard, Vancouver, ISO, and other styles

45

Tsai, Jin-shian, and 蔡金憲. "High Efficiency White Organic Light Emitting Diodes with a p-i-n Structure." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/59373459301833707312.

Full text

Abstract:

碩士<br>義守大學<br>電子工程學系碩士班<br>96<br>In this study, the Li-doped Alq3 (50%, 5 nm) as a doped electron transporting layer (n-doped ETL) and the MoO3-doped 2-TNATA as a doped hole injection layer (p-doped HIL) were utilized to forme a p-i-n white organic light emitting diode (WOLED).Systematic analyses of MoO3-doped 2-TNATA thin film have been done to study the optoelectronic performance of p-i-n WOLED devices’ performance. Fristly, the WOLED with various dopeing ratio of MoO3 in 80 nm thickness p-doped HIL of 2-TNATA have been fabricated. When 10 wt% MoO3 is doped in 2-TNATA film, the luminance

APA, Harvard, Vancouver, ISO, and other styles

46

Lu, Kun-da, and 呂坤達. "The Study of High Efficiency White Organic Light Emitting Devices with Tandem Structure." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/79098235361381059119.

Full text

Abstract:

碩士<br>國立中山大學<br>光電工程學系研究所<br>98<br>We have developed high-brightness white organic light-emitting diodes (OLEDs), which contain a tandem structure with two white electroluminescent (EL) units featuring a doping system comprised by a blue light-emitting host material [1,3,5-tris(1-pyrenyl)benzene (TPB3)] and a red light-emitting guest material[4-(dicyanomethylene) -2-tert-butyl -6-(1,1,7,7tetramethyljulolidyl-9-enyl)-4H-pyran(DCJTB)].In this study, we used Li doped[tris(8-hydroxyquinoline)aluminum (Alq3)] as the n-type connecting unit and MoO3 as the p-type connecting unit. We adjust the

APA, Harvard, Vancouver, ISO, and other styles

47

Lin, Yu-Cheng, and 林育丞. "High efficiency white phosphorescent organic light-emitting diodes with a charge control layer." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/9e64um.

Full text

Abstract:

碩士<br>義守大學<br>電子工程學系<br>102<br>In this paper, we dope blue phosphorescent iridium complexes iridium(III)bis[(4,6-di-fluorophenyl)-pyridinato-N,C2''] (FIrpic) and yellow phosphorescent iridium complexes Iridium(III) bis (4-phenylthieno [3,2-c]pyridinato-N,C2′)acetylacetonate (PO-01) into the small molecular phosphorescent host N, N_-dicarbazolyl-3, 5-benzene (mCP) to fabricate white phosphorescent organic light-emitting diodes (white PHOLEDs). Device current efficiency is enhanced by inserting a charge control layer (CCL) into the emitting layer. The peaks of PHOLED electroluminescent (EL) spec

APA, Harvard, Vancouver, ISO, and other styles

48

Wang, Chung-Pei, and 王仲培. "Fabrication Study of High-efficiency Two-wavelength Fluorescent White Organic Light-emitting Diodes." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/48520159121178537953.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Chiu, Yung-Sheng, and 邱永昇. "Fabrication Study of High-efficiency and Color-stable Fluorescent White Organic Light-emitting Diodes." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/50264330946180021272.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Dai, Shen-Yu, and 戴燊毓. "Using Solution Process to Manufacture High-Efficiency Large-Area White Organic Light-Emitting Diodes." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/a372c3.

Full text

Abstract:

碩士<br>國立虎尾科技大學<br>光電工程系光電與材料科技碩士班<br>104<br>This thesis of research is using solution process to manufacture high-efficiency large-area white organic light-emitting diodes (OLED). The main focus is to improve the efficiency of large-area OLED device in order to achieve a large area lighting needs. Device emitting area 3.4cm × 3.4cm. First, the deployment of a white light emitting layer solution, Emissive layer using phosphorescence host materials 26DCzppy, using doping blue phosphorescence materials Firpic and orange fiuorescent materials Ey53, manufacture of dual-band white device, dopant con

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!