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Dissertations / Theses on the topic 'Organic light-emitting materials'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Chen, Haiying. "Study on materials for organic light-emitting diodes /." View abstract or full-text, 2003. http://library.ust.hk/cgi/db/thesis.pl?ELEC%202003%20CHEN.

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2

Visweswaran, Bhadri. "Encapsulation of organic light emitting diodes." Thesis, Princeton University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3665325.

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<p> Organic Light Emitting Diodes (OLEDs) are extremely attractive candidates for flexible display and lighting panels due to their high contrast ratio, light weight and flexible nature. However, the materials in an OLED get oxidized by extremely small quantities of atmospheric moisture and oxygen. To obtain a flexible OLED device, a flexible thin-film barrier encapsulation with low permeability for water is necessary. </p><p> Water permeates through a thin-film barrier by 4 modes: microcracks, contaminant particles, along interfaces, and through the bulk of the material. We have developed

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3

Shaheen, Sean E. "Device physics of organic light-emitting diodes." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/289012.

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This work investigated several aspects of OLED device physics. The mechanisms responsible for the efficiency enhancement typically seen when a dye molecule is doped into the emission layer were examined. By comparing the spectra and efficiencies of single-layer devices for varying dopant concentrations, it was found that both charge transfer and energy transfer from the host molecule to the dye dopant are important processes. The measured efficiencies for photoluminescence and electroluminescence were found to be consistent with a simple model developed to explain the functional dependence on

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4

Vlachos, Panagiotis. "Heterocyclic liquid crystal materials for organic light emitting diodes." Thesis, University of Hull, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396738.

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5

Flechon, C. "Organic light-emitting diodes based on new promising materials." Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1386057/.

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The present work focuses on the investigation of two types of new materials, phosphorescent and near-infrared, for the fabrication of solution-processible Organic Light-Emitting Diodes (OLEDs). After the introduction of the theoretical background in the first part, the second part concentrates on phosphorescent OLEDs based on copper transition metal complexes. The photophysical properties of the copper complexes, the phosphorescent host and the interlayers were studied before the fabrication of phosphorescent OLEDs. Despite the various colours exhibited by the metal complexes all devices emit

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6

Bronstein, Hugo. "Electrophosphorescent materials for use in organic light emitting devices." Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/11225.

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7

Keyworth, Colin William. "Silicon-containing organic conjugated materials for light emitting diodes." Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/11192.

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This thesis contains a study of polymer light emitting diodes (PLEDs) for commercial use within blue organic light-emitting diode (OLED) display technologies. The introduction chapter outlines the aims and synthetic strategies / targets employed during the research and gives background information as to the historical development of OLEDs and PLEDs. The first chapter of research involves the synthesis of several alternating co-polymers of dibenzosilole (a previously reported monomer used in light emitting devices), along with the prerequisite monomers. These co-polymers have been fully charact

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8

Anderson, Michele Lynn 1968. "Characterization of organic/organic' and organic/inorganic heterojunctions and their light-absorbing and light-emitting properties." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282555.

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Increasing the efficiency and durability of organic light-emitting diodes (OLEDs) has attracted attention recently due to their prospective wide-spread use as flat-panel displays. The performance and efficiency of OLEDs is understood to be critically dependent on the quality of the device heterojunctions, and on matching the ionization potentials (IP) and the electron affinities (EA) of the luminescent material (LM) with those of the hole (HTA) and electron (ETA) transport agents, respectively. The color and bandwidth of OLED emission color is thought to reflect the packing of the molecules in

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9

Zhang, Lu. "TADF process in blended organic luminescent material." HKBU Institutional Repository, 2016. https://repository.hkbu.edu.hk/etd_oa/340.

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Organic light-emitting diode (OLED) devices have been applied in the fields of display and solid-state lighting. In addition to phosphorescent OLEDs using heavy transition metals, a new approach of harvesting both singlet and triplet excitons generated in the OLED device by using pure organic materials has drawn a lot of attentions in recent years. It is thermally activated delayed fluorescence (TADF) process, which makes it possible to obtain potential 100% internal quantum efficiency (IQE);TADF is a process existing in certain organic materials with small singlet-triplet exchange energy (EST

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10

Perez-Bolivar, Cesar A. "Synthesis and Studies of Materials for Organic Light-Emitting Diodes." Bowling Green State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1272652295.

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11

Fong, Hon Hang. "Transport and luminance of organic electronic materials." HKBU Institutional Repository, 2004. http://repository.hkbu.edu.hk/etd_ra/612.

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12

Reig, Canyelles Marta. "Carbazole-Based Materials for Organic Thin-Film Transistors and Organic Light-Emitting Diodes." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/404560.

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This thesis deals with the preparation and characterization of novel organic semiconductors based on the carbazole heterocycle for electronic and optoelectronic applications, specifically to be studied as active layers in OTFTs and as emitting layers in OLEDs. Carbazole-based materials are recognised for their high thermal stability, high emission efficiencies and excellent hole-transporting properties associated to its electron-donating ability, which make of them promising candidates for OTFTs and OLEDs applications. OLEDs have been studied extensively due to their promising applications i

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13

Du, Weiwei. "Development of new organic emissive materials for organic light-emitting diodes and organic laser applications." Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS215.

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Dans ce travail, de nouveaux matériaux émetteurs organiques ont été développés pour des applications dans le domaine des diodes électroluminescentes ou des lasers organiques. Tout d’abord, trois séries de molécules « through space » TADF (Fluorescence retardée activée thermiquement) à base de cœurs cyclophane ont été préparées avec succès. Leurs structures chimiques ont été caractérisées par résonnance magnétique nucléaire (RMN) et spectroscopie de masse haute résolution (HRMS). Leurs propriétés photophysiques ont été étudiées en solution et à l’état solide. Dans ces structures, le transfert d

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14

Gorjanc, Timothy C. "Study of lanthanum-based cathode materials for organic light-emitting devices." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ38751.pdf.

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15

Lin, Meifang. "Robust organic light emitting device with advanced functional materials and novel device structures." HKBU Institutional Repository, 2008. http://repository.hkbu.edu.hk/etd_ra/939.

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16

Somasundaram, Sahadev. "Design of low-cost organic light emitting diodes." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/122470/2/__qut.edu.au_Documents_StaffHome_StaffGroupH%24_halla_Desktop_Sahadev_Somasundaram_Thesis.pdf.

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This project focused on reducing the production cost of organic light emitting diodes and organic semiconductors through intuitive engineering design. Included in the thesis is a comprehensive, bottom-up method of design, synthesis, fabrication and analysis of both a set of luminescent materials and semiconductor device structure for use in organic light emitting diodes. The results demonstrate the viability of the method and reveal novel findings about the "thermally activated delayed fluorescence" phenomenon and its application in organic light emitting diodes.

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17

Chen, Zhao. "Cyclometalated iridium(III) complexes for full-color and near infrered phosphorescent organic light-emitting diodes." HKBU Institutional Repository, 2018. https://repository.hkbu.edu.hk/etd_oa/484.

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Dramatic increase of energy consumption and environmental problems invigorate the development of organic semi-conductive materials to substitute for the conventional inorganic materials in the application of photovoltaic and light-emitting devices. In view of the merits of low driving voltage, high power conversion efficiency, large-area fabrication of thin and light organic films as well as saturated emission, organic light-emitting diodes (OLEDs) have received much more consideration by scientists in the past two decades. And even out of laboratory, the OLEDs are popular among the commercial

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18

Fan, Jia. "Concentration quenching mechanism in doped OLED materials." HKBU Institutional Repository, 2007. http://repository.hkbu.edu.hk/etd_ra/829.

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19

Hunting, Lindsay (Lindsay E. ). "Components, production processes, and recommendations for future research in organic light emitting diodes." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/58447.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2009.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 29).<br>Organic Light Emitting Diodes (OLEDs) are small, optoelectronic devices that can be used in the production of energy-efficient, high definition displays in cell phones, computers, and televisions. These devices have great potential to replace light emitting diodes (LEDs) completely because they are more environmentally friendly to produce, they are more efficient, and they can create displays much thi

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20

Kwok, Chi-chung. "Functional light-emitting materials of platinum, zinc and boron for organic optoelectronic devices." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B34617693.

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21

郭子中 and Chi-chung Kwok. "Functional light-emitting materials of platinum, zinc and boron for organic optoelectronic devices." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B34617693.

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22

Fisher, Alison Lauren. "A study of light-emitting diodes and transistors based on ambipolar organic materials." Thesis, Durham University, 2014. http://etheses.dur.ac.uk/10626/.

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This thesis is concerned with the incorporation of a range of fluorescent ambipolar materials into Organic Light-Emitting Diodes (OLEDs) and transistors and the characterisation of their optoelectronic properties. Initial studies focused on the incorporation of donor-acceptor compounds based on carbazole-fluorene-oxadiazole in OLEDs. Using this approach, a simple, efficient, deep-blue device was realised, with Commission Internationale de l’Eclairage, CIE (x, y) coordinates (0.16, 0.08), very close to the blue standard of (0.14, 0.08) defined by the National Television System Committee. The de

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23

McClary, LaKeisha Michelle. "Synthesis and characterization of norbornene-functionalized side-chain monomers for potential use as transport materials in organic light-emitting diodes." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/26696.

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Thesis (M.S.)--Chemistry and Biochemistry, Georgia Institute of Technology, 2008.<br>Committee Chair: Marder, Seth; Committee Member: Bredas, Jean-Luc; Committee Member: Tolber, Laren. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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24

Ho, Cheuk Lam. "Conjugated metal-organic phosphorescent materials and polymers containing fluorene and carbazole units." HKBU Institutional Repository, 2007. http://repository.hkbu.edu.hk/etd_ra/808.

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25

Anikeeva, Polina Olegovna. "Physical properties and design of light-emitting devices based on organic materials and nanoparticles." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/46680.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2009.<br>Includes bibliographical references (p. 201-213).<br>This thesis presents the detailed experimental and theoretical characterization of light-emitting devices (LEDs) based on organic semiconductors and colloidal quantum dots (QDs). This hybrid material system has several advantages over crystalline semiconductor technology; first, it is compatible with inexpensive fabrication methods such as solution processing and roll-to-roll deposition; second, hybrid devices can be fabricated on fle

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26

Lau, Tsz-wai Raymond, and 劉子偉. "Organic light emitting diodes: effects of anode treatments to device efficiency and stability." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31227545.

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27

Anderson, Jeffrey David. "Characterization and synthesis of organic semiconductor materials for light-emitting diodes: Structure-property relationships." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/284304.

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Light generation in organic light emitting diodes (OLEDs) requires the recombination of electron-hole pairs at a p-n junction. Radiative recombination has been investigated with solution electrochemical studies of the principal lumophores, dopants, and hole-transport agents of small molecule OLEDs. We have found that solution electrogenerated chemiluminescent (ECL) reactions between radical anion and cation states of OLED components model the spectral output and efficiency of solid-state electroluminescence. These studies have shown that the molecular structures of commonly used materials in O

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28

Gaj, Michael Peter. "High-performance organic light-emitting diodes for flexible and wearable electronics." Diss., Georgia Institute of Technology, 2016. http://hdl.handle.net/1853/55011.

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Optoelectronic devices based on organic semiconductors have been the focus of increasing research over the past two decades. While many of the potential organic electronic concepts (solar cells, transistors, detectors etc.) are still in their infancy stage, organic light-emitting diodes have gained commercial acceptance for their potential in high resolution displays and solid-state lighting. However, in order for these devices to reach their full potential significant advances need to make to address their fundamental limitations, specifically: device life-time, thin-film encapsulation and sc

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29

Ho, Kai Wai. "Evaluation and characterization of efficient organic optoelectronic materials and devices." HKBU Institutional Repository, 2020. https://repository.hkbu.edu.hk/etd_oa/816.

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With the progression towards lighter but larger-display self-sustainable mobile devices, device eﬃciency becomes increasingly important, owing to the higher power display consumption but at the same time more limitation on the size and volume of energy storage. In this thesis, selected aspects regarding to eﬃciency of three types of optoelectronic devices, indoor photovoltaics (IPVs), perovskite thin-ﬁlm transistors (TFTs) and organic light-emitting diodes (OLEDs) have been investigated. IPVs can make oﬀ-grid devices self-sustainable by harvesting ambient light energy. Its weak irradiance nece

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30

Ho, Ka Wai. "Evaluation and characterization of efficient organic optoelectronic materials and devices." HKBU Institutional Repository, 2020. https://repository.hkbu.edu.hk/etd_oa/873.

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With the progression towards lighter but larger-display self-sustainable mobile devices, device eﬃciency becomes increasingly important, owing to the higher power display consumption but at the same time more limitation on the size and volume of energy storage. In this thesis, selected aspects regarding to eﬃciency of three types of optoelectronic devices, indoor photovoltaics (IPVs), perovskite thin-ﬁlm transistors (TFTs) and organic light-emitting diodes (OLEDs) have been investigated. IPVs can make oﬀ-grid devices self-sustainable by harvesting ambient light energy. Its weak irradiance nece

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31

Blochwitz, Jan. "Organic light-emitting diodes with doped charge transport layers." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2001. http://nbn-resolving.de/urn:nbn:de:swb:14-997196106312-42499.

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Organische Farbstoffe mit einem konjugierten pi-Elektronen System zeigen überwiegend ein halbleitendes Verhalten. Daher sind sie potentielle Materialien für elektronische und optoelektronische Anwendungen. Erste Anwendungen in Flachbildschirmen sind bereits in (noch) geringen Mengen auf dem Markt. Die kontrollierte Dotierung anorganischer Halbleiter bereitete die Basis für den Durchbruch der bekannten Halbleitertechnologie. Die Kontrolle des Leitungstypes und der Lage des Fermi-Niveaus erlaubte es, stabile pn-Übergänge herzustellen. LEDs können daher mit Betriebsspannungen nahe dem thermodynam

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32

Schrögel, Pamela [Verfasser], and Peter [Akademischer Betreuer] Strohriegl. "Novel Host Materials for Blue Phosphorescent Organic Light-Emitting Diodes / Pamela Schrögel. Betreuer: Peter Strohriegl." Bayreuth : Universitätsbibliothek Bayreuth, 2011. http://d-nb.info/1015875351/34.

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33

Montes, Victor A. "Synthesis and Electro-optical Properties of Novel Materials for Application in Organic Light-Emitting Diodes." Bowling Green State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1173835623.

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34

Furitsu, Suzuki. "Structural Studies on Charge-Transport and Emission Properties of Materials for Organic Light-Emitting Diodes." Kyoto University, 2017. http://hdl.handle.net/2433/226785.

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35

Sewagudde, Deborah Nabbosa Miriam. "Why did video screens get slimmer? : a study of the role of Intellectual Property in the commercial development of organic light-emitting diodes." Thesis, Queen Mary, University of London, 2017. http://qmro.qmul.ac.uk/xmlui/handle/123456789/25944.

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This research project consists of a critical analysis of the role of intellectual property amongst other factors in the successful commercial development at the Cavendish Laboratory of optoelectronic light emitting diode display devices based on novel organic semiconductor materials. It begins by giving the background to the quantum mechanical properties upon which the technology is based, followed by a discussion of the path of innovation, describing the interaction between the different socioeconomic factors that influence this path. It then draws an analogy with the development of an analog

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36

"High-Performance Organic Light Emitting Diodes." Doctoral diss., 2019. http://hdl.handle.net/2286/R.I.53867.

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abstract: Organic electronics have remained a research topic of great interest over the past few decades, with organic light emitting diodes (OLEDs) emerging as a disruptive technology for lighting and display applications. While OLED performance has improved significantly over the past decade, key issues remain unsolved such as the development of stable and efficient blue devices. In order to further the development of OLEDs and increase their commercial potential, innovative device architectures, novel emissive materials and high-energy hosts are designed and reported. OLEDs employing step-

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37

Lin, Yu-Ting, and 林于庭. "Short-Wavelength Organic Light-Emitting Materials and Devices." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/39451445580511000633.

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博士<br>國立臺灣大學<br>光電工程學研究所<br>94<br>Organic light-emitting devices (OLEDs) have been the subjects of intense investigation in recent years due to their applications in displays and lighting. In all these applications, the short-wavelength emitting materials and devices with high efficiency, good color purity and thermal stability have been essential. In this thesis, we investigate of various device architectures to study the optical and electrical properties of the short-wavelength emitting materials. In the first part of the work, we employed an efficient and morphologically stable pyrimidine

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38

Huang, Ming Hong, and 黃名宏. "Light Emitting Devices Based on Organic and Organic-Inorganic Hybrid Materials." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/jxp9x2.

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39

Lee, Yung-Chih, and 李勇志. "Fabrication of Organic Light-Emitting Diodes Using Semiconductor Nanocrystal as Emitting Materials." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/68772436620111505183.

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碩士<br>國立臺灣師範大學<br>化學研究所<br>89<br>We have synthesized CdSe and CdSe(CdS) core/shell nanorcrystals in tri-n-octylphosphine oxide (TOPO) micellar solution using dimethylcadmium (Cd(CH3)2), selenium (Se) powder and bis-trimethylsilane sulfide ((TMS)2S) as the reactants. The sizes of the nanocrystals were controlled by varying the experimental conditions such as the concentration of Cd(CH3)2, reaction temperature, and reaction time. The nanocrystals were characterized using UV-Vis absorption and fluorescence spectra. The absorption and fluorescence spectra suggested that the band edges of the resul

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40

Kuo, Ming-Yu, and 郭明裕. "Investigations of Photocatalyst TiO2 and Organic Light-emitting Materials." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/03534176068177368220.

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博士<br>國立中山大學<br>材料科學研究所<br>92<br>TiO2. Structural and electronic properties of TiO2 polymorphs denser than rutile, i.e. α-PbO2-, baddeleyite, fluorite, and cotunnite-type were calculated by a first-principle pseudo-potential method based on density functional theory with local density approximation. Using experimental and theoretical lattice parameters of ambient TiO2, i.e. anatase and rutile as standard, the fluorite-type TiO2 has the narrowest band gap among the post-rutile phases. This character is important for the potential applications as visible-light-responsive photocatalyst. In additi

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41

Chen, Kuei-Bai, and 陳奎百. "Nano-Structure Enhanced Organic Light Emitting Materials and Devices." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/69313460674782550942.

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42

Wu, Sheng-Yu, and 武昇佑. "Synthesis and Numerical Simulation for Organic Light-Emitting Materials." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/27246846269658274972.

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碩士<br>國立臺北科技大學<br>有機高分子研究所<br>92<br>In the first part of this dissertation, two soluble PPV derived polymers, BDMO-PPV [poly 2,5-bis(3,7-dimethyloctyl)-1,4-phenylene vinylene] and MEH-PPV [poly 2-methoxy-5-(2’ethyl-hexyloxyl)-1,4-phenylene vinylene] have been synthesized. The effect of the base and monomer injection conditions on the formation of polymer has been investigated. The result shows that BDMO-PPV with longer alkyl side-chains than MEH-PPV gave less gel formation during polymerization. The experiment shows a better polymerization occurred with the addition sequence of monomer

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43

Sharma, Nidhi. "Maleimide Based Materials for Organic Light-Emitting Diodes (OLEDs)." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/3678.

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Maleimide based highly luminescent material Cbz-MI with donor acceptor donor (D-A-D) backbone has been synthesized and characterized. An organic light emitting diode fabricated using this material as emitting layer exhibited EQE of 2.5% in the yellow region of visible spectrum. Due to the small energy gap of materials emitting in this region of spectrum, EQE of OLED is usually limited by various non-radiative decays and high EQE of OLED using this material proves that most of the nonradiative decay pathways have been avoided by the careful design of molecule and device structure. Although Cbz-

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44

Sharma, Nidhi. "Maleimide Based Materials for Organic Light-Emitting Diodes (OLEDs)." Thesis, 2015. http://etd.iisc.ernet.in/2005/3678.

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Maleimide based highly luminescent material Cbz-MI with donor acceptor donor (D-A-D) backbone has been synthesized and characterized. An organic light emitting diode fabricated using this material as emitting layer exhibited EQE of 2.5% in the yellow region of visible spectrum. Due to the small energy gap of materials emitting in this region of spectrum, EQE of OLED is usually limited by various non-radiative decays and high EQE of OLED using this material proves that most of the nonradiative decay pathways have been avoided by the careful design of molecule and device structure. Although Cbz-

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45

葉子豪. "Effects of Deuterated Light Emitting Materials on the Performance of Green Phosphorescence Organic Light Emitting Devices." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/85450800776059472795.

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46

"Phosphorescent Organic Light Emitting Diodes Implementing Platinum Complexes." Doctoral diss., 2014. http://hdl.handle.net/2286/R.I.25889.

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abstract: Organic light emitting diodes (OLEDs) are a promising approach for display and solid state lighting applications. However, further work is needed in establishing the availability of efficient and stable materials for OLEDs with high external quantum efficiency's (EQE) and high operational lifetimes. Recently, significant improvements in the internal quantum efficiency or ratio of generated photons to injected electrons have been achieved with the advent of phosphorescent complexes with the ability to harvest both singlet and triplet excitons. Since then, a variety of phosphorescent c

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47

Tsai, Wei-Lung, and 蔡維隆. "Investigation of high-efficiency organic light-emitting materials and devices." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/38910972303402611812.

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博士<br>國立臺灣大學<br>電子工程學研究所<br>105<br>Organic light-emitting diodes (OLEDs) have attracted much attention due to their potential for future display and lighting applications. To enhance OLED performances and reduce cost for displays and lighting, we focused on the investigation of high-efficiency organic light-emitting materials in this thesis. In the first part of this thesis, a new class of neutral bis-tridentate Ir(III) metal complexes that show nearly unitary red, green, and blue emissions are employed for the fabrication of both monochrome and white emitting organic light-emitting diodes, am

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48

Hsin-Hung, Tsai. "Study of Host Materials for Phosphorescent Organic Light-emitting Devices." 2005. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-1901200612230700.

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49

王雅琪. "Electron Transporting Materials for High-efficiency Organic Light Emitting Diodes." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/5925pv.

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50

Tsai, Hsin-Hung, and 蔡信弘. "Study of Host Materials for Phosphorescent Organic Light-emitting Devices." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/70463449150842084304.

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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 demonstrated phosphorescent organic light-emitting devices (PHOLEDs) by using a novel host material and two transporting materials as the host of PHOLED. We used an n-type transporting material as the host of green PHOLED. Due to the better energy alignment with adjacent transporting materials, our device exhibits a lower turn-on voltage by about 2.5 volts with the current density of 100 mA/cm2 as compared to the conventional carbazole OLED. The power efficiency is increased from 8 to 10 lm/W at the luminance of 1000 cd/m2.However, the curre

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