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博碩士論文 etd-0824111-113128 詳細資訊
Title page for etd-0824111-113128
論文名稱
Title
電化學成長聚苯胺薄膜於高分子發光二極體之研究
The study of electrochemical deposited PANI thin film for polymer organic 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
105
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
2011-07-12
繳交日期
Date of Submission
2011-08-24
關鍵字
Keywords
電化學、循環伏安法、高分子發光二極體、電洞傳輸層
PANI, PLED, cyclic voltammetry
統計
Statistics
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The thesis/dissertation has been browsed 5655 times, has been downloaded 1164 times.
中文摘要
本研究以電化學聚合聚苯胺(PANI)於ITO陽極基板上,並且應用於高分子發光二極體上作為電洞傳輸層。探討在不同單體濃度下所聚合之薄膜對於元件的影響。並對其光性以及電性做分析且與PEDOT:PSS作比較。其元件結構:ITO (170 nm) / PANI (55 nm ) / PFG(60 nm )/LiF(1nm)/Ca(10nm) / Al (200 nm)。
材料分析上聚苯胺薄膜不管在透光性以及電性上都有具備良好的特性。根據UV-Vis的量測,光性部份PANI薄膜在綠光材料之主要放光波段500nm到600nm之間與PEDOT:PSS相同都擁有接近90%的高穿透率。至於導電度的量測上,量測相同厚度下的PANI薄膜與PEDOT:PSS薄膜其元件的I-V曲線並計算其導電度,經由計算得知PANI薄膜的導電率為2.02x10-2(s/cm),PEDOT:PSS薄膜的導電率為1.28x10-2(s/cm)。聚苯胺薄膜與PEDOT:PSS在相同膜厚下,聚苯胺薄膜其電性的確比PEDOT:PSS薄膜還來的優越。功函數HOMO量測上,PANI在不同單體濃度聚合下之薄膜,HOMO值沒有因此改變,約略都與PEDOT:PSS落在5.0eV。與PEDOT:PSS具有相同的能階匹配能力。根據以上材料分析,PANI有其應用在高分子發光二極體電洞傳輸層上之可能性。
本實驗可藉由不同的聚合參數調控薄膜表面形態,在元件效率方面,發現影響效率與否的最大因素乃至於PANI薄膜的表面粗糙度。而在掃描速率0.01V/s且單體濃度0.3M下所成長的薄膜擁有最適當的表面形態。而在元件表現上達最大亮度10500cd/m2 @15V,最大功率效率為0.25 lm/w @10V。
Abstract
In this research,we used the electrochemical (cyclic voltammetry) method to synthesize (polyaniline) PANI thin film on the top of ITO substrate which applied extensively on polymer organic light emitting diodes based on ITO (170nm) / PANI (55nm ) / PFG(60 nm )/LiF(1nm)/Ca(10nm) / Al (200nm) .
The PANI thin films have excellent optical and electric properties. According to the measurement results of ultraviolet visible spectrophotometry, the PANI thin films with different aniline monomer concentrations display the absorption peak at the range of 500nm to 600nm and have high light transmission near 90%. The conductivity of PANI thin film (2.02x10-2(s/cm)) is higher than that of PEDOT:PSS thin film (1.28x10-2(s/cm)). The highest occupied molecular orbital value of PANI thin film is about 5.0 eV that close to PEDOT:PSS thin film. Therefore, it is suitable act as hole transporting layer.
In this study, we can control the surface morphology of PANI thin film by exchanging synthesized parameters. Finally, we have fabricated a PLED device with PANI as a hole transporting layer by electrochemical synthesis with at the aniline monomer concentration of 0.3M and the scan rate of 0.0.1 V/s. The device exhibits a maximum luminance of 10500 cd/m2 at 15 V and power efficiency of 0.25 lm/W at 10V.
目次 Table of Contents
目錄
致謝 I
中文摘要 III
Abstract IV
目錄 V
圖目錄 VII
表目錄 X
第一章 序論 1
1-1 前言 1
1-2 有機電激發光元件簡介 2
1-3 導電高分子發展過程 9
1-4 導電高分子-聚苯胺 12
1-4-1 聚苯胺的回顧 12
1-4-2 聚苯胺的簡介 13
1-4-3 聚苯胺的合成機構 15
1-4-4 聚苯胺質子酸摻雜機構 18
1-5 有機電激發光元件結構與發光機制 20
第二章 理論基礎 24
2-1 有機及無機電激發光機制比較 24
2-2 有機電激發光能量轉移機制 27
2-2-1 放射能量轉移 28
2-2-2 非放射能量轉移 29
2-3 有機電激發光元件特性 34
2-4 研究動機 34
第三章 實驗分析儀器與製程步驟 37
3-1 實驗架構 37
3-2 實驗材料、製程設備、量測儀器 38
3-2-1 實驗材料 38
3-2-2 製程設備 40
3-2-3 量測儀器 44
3-3 實驗流程 55
3-3-1 ITO陽極圖形化 55
3-3-2 PLED元件製程 57
第四章 結果與討論 62
4-1 材料分析結果與討論 62
4-1-1 UV-Vis量測吸收光譜 62
4-1-2 UV-Vis量測穿透光譜 64
4-1-3 電性量測 66
4-1-4 能階的測定 68
4-1-5 薄膜表面形貌 69
4-1-6 表面粗糙度 71
4-2 元件製程結果與討論 74
4-2-1 電化學法(循環伏安)之掃描速率的選定 74
4-2-2 將PANI薄膜製作於高分子發光二極體之電洞傳輸層 75
4-2-3 元件特性之探討 75
4-2-4 元件退火溫度的優化 79
4-2-5 表面粗糙度對於元件之影響 82
第五章 總結 87
第六章 參考文獻 89

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