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博碩士論文 etd-0624114-135327 詳細資訊
Title page for etd-0624114-135327
論文名稱
Title
具雙極性載子傳輸特性之材料於有機發光元件應用之研究
Investigation of OLEDs utilizing bipolar host materials
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
71
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2014-07-17
繳交日期
Date of Submission
2014-07-24
關鍵字
Keywords
有機發光二極體、雙極性載子傳輸材料、純化系統-管式高溫爐、高真空熱蒸鍍系統、磷光主體材料
organic light-emitting diodes, Bipolar carrier transporting materials, vacuum evaporation depostion system, phosphorescent host materials, tube-furnace
統計
Statistics
本論文已被瀏覽 5629 次,被下載 208
The thesis/dissertation has been browsed 5629 times, has been downloaded 208 times.
中文摘要
具雙極性載子傳輸特性的材料適合做為有機發光二極體(OLED)中的主體發光層,其優點為平衡發光層中電子與電洞的傳輸,使其有較大的再結合區域,可有效形成激子並放光,而且可使元件結構簡化、降低製作成本;本篇論文探討一系列具雙極性載子傳輸特性的材料,分子結構包含咔唑(carbazol)和三甲基苯硼基(triarylboron)兩種分子基團,為具有雙極性載子傳輸特性的材料,因此我們將其應用在有機磷光元件中作為發光層的主體材料。
此一系列含硼的雙極性載子傳輸材料,依分子結構官能基的不同配位分別命名為1BMesCbz、3BMesCbz及NBMesCbz,搭配客體材料Ir(ppy)3摻雜1%做綠光元件,元件結構為ITO(120nm)/ TAPC(40 nm)/host:1wt% Ir(ppy)3(30 nm)/ TmPyPB (50nm) /LiF(0.5 nm)/Al(130 nm)。主體材料採用1BMesCbz時,元件最大亮度為15100 cd/m2(at 12V),最大功率效率為68.2 lm/W、電流效率為73.8cd/A與EQE為21.5%;主體材料採用3BMesCbz時,元件最大亮度為17700cd/m2(at 12V),最大功率效率為28.2 lm/W、電流效率為48.1cd/A與EQE為14.3%;當主體材料為NBMesCbz時,元件最大亮度為10700cd/m2(at 12V),最大功率效率為56.2lm/W、電流效率為53.7cd/A與EQE為15.7%。此一系列含硼的雙極性載子傳輸材料,不僅具有良好的元件效率,由於其具有雙極性載子傳輸特性,因此元件效率的roll-off特性表現極佳,適合做為OLED的主體發光層材料。
Abstract
Bipolar materials are suitable for being the host emitting layers of OLEDs benefiting by the balance of electron- and hole- transporting capability, which promotes effective formation of excitons. Moreover, the simplified structure also efficiently reduces production cost. In this work, a series of bipolar materials based on carbazole and triarylboron derivatives with high triplet energies are used as the host materials of phosphorescence OLEDs(PHOLEDs).
The carbazole/triarylboron derivatives are named as 1BMesCbz, 3BMesCbz and NBMesCbz according to their stereostructure. All of them were doped with 1wt% Ir(ppy)3 as the emitting layers for green PHOLEDs. The device configuration with the best performance was ITO(120nm)/TAPC(40nm)/host:1wt%Ir(ppy)3 (30nm)/TmPyPB (50nm)/LiF (0.5nm)/Al (130 nm). The maximum brightness, current efficiency, power efficiency and external quantum efficiencies of the devices were 15100 cd/m2(at 12V), 73.8 cd/A, 68.2 lm/W, and 21.5% for 1BMesCbz; 17700 cd/m2(at 15V), 48.1 cd/A, 28.2 lm/W, and 14.3 % for 3BMesCbz; 10700 cd/m2(at 12V), 53.7 cd/A , 56.2 lm/W, and 15.7 % for NBMesCbz.
目次 Table of Contents
中文論文審定書 I
英文論文審定書 II
致謝 III
摘要 IV
Abstract V
目錄 VI
圖目錄 VIII
表目錄 X
第一章 緒論 1
1-1 前言 1
1-2 有機發光二極體的發展及文獻回顧 3
1-3 研究動機與目的 5
1-4 各章提要 7
第二章 基礎理論 10
2-1有機電激發光元件結構發展 10
2-2有機電激發光原理 12
2-2-1 電激發光原理 12
2-2-2螢光與磷光發光原理 14
2-2-3磷光發光機制 17
2-3有機電激發光材料選擇 20
2-3-1陽極 20
2-3-2 陰極 20
2-3-3電洞注入與電洞傳輸層材料 20
2-3-4 電子注入與電子傳輸層材料 21
2-3-5主發光體材料與客發光體材料 22
第三章 實驗設備與元件製程 24
3-1 實驗設備介紹 24
3-1-1純化系統-管式高溫爐 (Tube-Furnace) 24
3-1-2超音波震盪機 (Ultrasonic Cleaner) 24
3-1-3紫外光/可見光光譜儀 (UV/Vis spectrophotometer )與螢光光譜儀 (photoluminescence spectrometer or fluorimeter) 25
3-1-4紫外光臭氧清洗機 (UV-ozone) 26
3-1-5 低水氧手套箱(Glove Box) 27
3-1-6 橢圓偏光儀(Ellipsometer) 27
3-1-7高真空熱蒸鍍系統(Vacuum Evaporation Depostion System) 27
3-2 元件製作流程 28
3-3 元件製程步驟 30
3-3-1 ITO 基板清洗與預處理 30
3-3-2實驗材料 30
3-4 元件量測 32
3-4-1量測系統 32
3-4-2 軟體Labview程式設計 33
3-4-3 元件量測步驟 34
第四章 結果與討論 36
4-1簡介 36
4-2主體材料的光及物理特性比較 36
4-3主體材料3BMesCbz搭配Ir(ppy)3 製作綠光元件探討 41
4-3-1 HTL&ETL材料搭配與選擇 41
4-3-2濃度摻雜 46
4-4主體材料1BMesCbz搭配Ir(ppy)3 製作綠光元件探討 48
4-5主體材料NBMesCbz搭配Ir(ppy)3 製作綠光元件探討 50
4-6 1BMesCbz、3BMesCbz、NBMesCbz製作磷光綠光最佳化元件比較 52
第五章 總結 55
參考文獻 56
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