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博碩士論文 etd-0702117-153533 詳細資訊
Title page for etd-0702117-153533
論文名稱
Title
以聚芳香醚高分子應用於深藍光有機發光二極體元件之研究
Investigation of poly(arylene ether)s applications in deep blue polymer light-emitting diodes
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
97
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
2017-07-19
繳交日期
Date of Submission
2017-08-02
關鍵字
Keywords
螺二芴、溶液製程、電洞注入層、聚芳香醚、深藍光、有機發光二極體、蒽
anthracene, solution processing, spirobifluorene, organic light emitting diode, poly(arylene ether)s polymer, deep blue, hole injection layer
統計
Statistics
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中文摘要
本論文以本實驗室自行開發之一系列深藍光高分子有機發光二極體之材料作為發光層,經由簡單的旋轉塗佈方式將電洞注入層及發光層成膜於ITO基板上。於材料分析中,高分子主體放光光譜與客體吸收光譜有很大的重疊面積,在2.5P及5P薄膜中具有很強的光致發光效率,並且具有明顯的深藍光色。
元件製程中,透過電洞注入層能階改善的手法,使混合材料產生明顯分層,形成一平滑階梯式的能階系統,在PEDOT:PSS:Nafion比例達1:20:25時,HOMO可達5.91eV,應用於元件中,能有效降低電洞注入層與發光層間過大的能障,而解決深藍光高分子由於HOMO過深造成亮度不高、效率不佳的問題,成功降低元件起始電壓。
在本研究中,深藍光最佳的元件結構為ITO/CHPF125/5P/TPBi/LiF/Al,最大亮度962 cd/m^2、最大外部量子效率1.41%、最大電流效率2.07cd/A、CIE座標(0.15,0.13),且具有良好的色穩定性。白光元件結構為ITO/ CHPF125/ 5P:DCJTB(1wt%)/ TPBi/ LiF/ Al,最大電流效率可達2.63cd/A,CIE座標(0.31,0.31)。
Abstract
In this work, a series of deep blue polymer light-emitting diode(PLED) materials as light-emitting layer. The hole injection layer and emitting layer is prepared simply spin-coating on the ITO substrate. In the spectrum of material, the strong overlap existing between the absorption spectrum of the guest and the emission spectrum of the host. The 2.5P and 5P film have strong photoluminescence peaks, and exhibited stable deep blue spectrum.
In the improvement of the hole injection layer, the smoothing work function is formed by phase separation. The HOMO can reach 5.91eV when the ratio of PEDOT: PSS: Nafion is 1:20:25. According to our experiments, insertion of CHPF125 can solve the problem of poor efficiency of deep blue light polymer, successfully reduce the turn-on voltage of device.
The PLED under the optimized structure of ITO/CHPF125/5P/TPBi/LiF/Al exhibited the maximum luminance of 962 cd/m^2, EQE of 1.41%, current efficiency of 2.07cd/A. CIE coordinates (x, y) are (0.15,0.13). WPLED with the configuration ITO/CHPF125/5P:DCJTB(1wt%)/TPBi/LiF/Al exhibited current efficiency of 2.63cd/A. CIE coordinates (x, y) are (0.31,0.31).
目次 Table of Contents
論文審定書 i
誌謝 ii
中文摘要 iii
Abstract iv
目錄 v
圖目錄 viii
表目錄 xii
第一章 緒論 1
1.1前言 1
1.2有機發光二極體之發展歷史 2
1.3有機發光二極體OLED和PLED的比較 5
1.4有機發光二極體原理 6
1.5有機發光二極體能量轉移機制 8
1.5.1輻射能量轉移 9
1.5.2非輻射能量轉移 9
1.6量子效率 11
1.7基本光學特性 12
1.8 CIE座標 12
1.9濃度淬熄效應 14
1.10多環芳香烴類 14
1.11文獻回顧 15
1.12研究動機 27
第二章 實驗儀器與原理 29
2.1製程儀器 29
2.1.1超音波清洗機(Ultrasonic Cleaner) 29
2.1.2紫外光臭氧清洗機(UV Ozone) 30
2.1.3手套箱三聯箱系統(Glove Box) 32
2.1.4旋轉塗佈機(Spin Coater) 33
2.1.5蒸鍍機(Evaporator) 34
2.1.6電子天秤 35
2.1.7磁式旋轉加熱盤 35
2.2量測儀器 36
2.2.1表面輪廓儀(Surface profiler) 36
2.2.2紫外-可見光光譜儀(UV-visible Spectrophotometer) 37
2.2.3螢光光譜儀(Fluorescence Spectrophotometer) 38
2.2.4光電子光譜分析儀(Photo-Electron Spectroscopy in Air,PESA) 39
2.2.5原子力顯微鏡(Atomic Force Microscope, AFM) 40
2.2.6橢圓偏光儀(Ellipsometer) 42
2.2.7光電特性量測系統 44
第三章 實驗 45
3.1實驗規劃 45
3.2實驗藥品 46
3.3實驗細節 50
3.3.1藥品調製 50
3.3.2元件製程 50
第四章 結果與討論 53
4.1 P系列高分子有機發光二極體材料特性鑑定分析 53
4.1.1吸光特性分析 53
4.1.2放光特性分析 54
4.1.3 P系列材料薄膜能階分析 55
4.2 P系列高分子有機發光二極體基本元件 57
4.3電洞注入層特性改善及分析 60
4.3.1電洞注入層能階量測 60
4.3.2電洞注入層薄膜表面形貌分析 62
4.4 Nafion應用於P系列高分子有機發光二極體元件 64
4.5以TPBi作為電洞阻擋層之高分子有機發光二極體元件 66
4.6高效率深藍光元件 70
4.7白光元件 75
第五章 結論 79
參考文獻 80
附錄 84
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