高效率有機發光二極體元件：非銦鍚氧化物、倒置型、上發光之元件結構開發

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研究生：	吳得峻 Te-Chun Wu
論文名稱：	高效率有機發光二極體元件：非銦鍚氧化物、倒置型、上發光之元件結構開發 Development of ITO-Free, Inverted, and Top-Emitting Structures for High-Efficiency Organic Light-Emitting Diodes
指導教授：	李志堅 Chih-Chien Lee
口試委員:	李志堅 Chih-Chien Lee 劉舜維 Shun-Wei Liu 范慶麟 Ching-Lin Fan 張志豪 Chih-Hao Chang
學位類別：	碩士 Master
系所名稱：	電資學院 - 電子工程系 Department of Electronic and Computer Engineering
論文出版年：	2023
畢業學年度：	111
語文別：	中文
論文頁數：	67
中文關鍵詞：	倒置頂部發光有機發光二極體、介電/金屬/介電結構、微共振腔結構、柔性有機發光二極體、有機太陽能耦合器
外文關鍵詞：	ITOLED, dielectric/metal/dielectric, micro cavity, flexible OLED, organic photocoupler
相關次數：	點閱：152 下載：0
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上一筆

在本研究中我們聚焦在開發一種高效率倒置型上發光的可撓性有機發光二極體 (organic light emitting diode，簡稱OLED)元件結構。首先我們在玻璃基板上進行元件結構優化，我們以具有可撓性的厚銀作為該元件之底部電極取代常用的銦錫氧化物 (indium tin oxide，簡稱ITO)，以及介電質/薄金屬/介電質 (dielectric/metal/ dielectric，簡稱DMD)結構作為頂部陽極。我們調整元件的電子注入層條件，並在這之中我們觀察到此系列上發光元件具有強烈的微共振腔效應，兩電極間的總厚度變化對於元件的電致發光 (electroluminescence，簡稱EL)光譜以及效率產生巨大影響，因此我們也對元件的內部與外部光學結構進行優化，其中以使用有機材料N,N'-Bis(naphthalen-1-yl)-N,N'-bis(phenyl)-benzidine (NPB)作為外部介電質覆蓋層 (capping layer)之元件具有最好的效率表現，且適當的覆蓋層 (capping layer)厚度能夠抑制元件的微共振腔效應。即便透過以上優化，我們所開發的上發光元件依然受到一定程度的微共振腔效應影響，因此我們進一步透過變角度EL光譜量測其光場分布並對元件效率進行校正。經過校正後我們成功實現出一EL效率與下發光標準元件相仿的倒置型上發光元件。同時，該元件於定電壓3 V下之連續操作下亮度衰退至起始亮度之75%之壽命為200小時。
隨後我們將該最佳化元件製作於可撓性高分子聚一氯對二甲苯 (parylene-C)基板上，該元件於輔助基板上以及從輔助基板上剝離後的EL效率相仿，驗證了我們提出之元件架構之可行性。
最後我們將此元件與有機光感測器 (organic photo-detector，簡稱OPD)組合成一有機光耦合器 (organic photocoupler，簡稱OPC)，其電流轉效率達到2.54%。

In this paper, we focus on developing a high-efficiency inverted organic light emitting diode (OLED) device structure with flexibility. Firstly, we optimize the device structure on a glass substrate, and we replace the commonly used indium tin oxide (ITO) with flexible thick silver as the bottom electrode of the device, and use a dielectric/metal/dielectric (DMD) structure as the top anode. We adjust the conditions of the electron injection layer in the device and observe a strong microcavity effect in this series of emitting devices. The total thickness variation between the two electrodes has a significant impact on the electroluminescence (EL) spectrum and efficiency of the device. Therefore, we optimize the internal and external optical structures of the device. The device using the organic material N,N'-Bis(naphthalen-1-yl)-N,N'-bis(phenyl)-benzidine (NPB) as the capping layer exhibits the best efficiency performance, and an appropriate capping layer thickness can suppress the microcavity effect of the device. Even with the aforementioned optimizations, the developed emitting device is still affected by a certain degree of microcavity effect, so we further measure the light field distribution of the device through angle-dependent EL spectroscopy and correct the device efficiency. After correction, we successfully achieve an EL efficiency comparable to that of conventional emitting standard devices in the inverted emitting device. Furthermore, the device exhibits a lifetime of 200 hours with the continuous operation at a constant voltage of 3 V, with the brightness fading to 75% of the initial brightness.
Subsequently, we fabricate the optimized device on a flexible polymer substrate of parylene-C. The device exhibits similar EL efficiency both on the auxiliary substrate and after being peeled off from the auxiliary substrate, validating the feasibility of the proposed device structure.
Finally, we combine this device with an organic photodetector (OPD) to form an organic photocoupler (OPC), achieving a current conversion efficiency of 2.54%.

中文摘要 ...................................................................... III
ABSTRACT ..................................................................... IV
誌謝 ........................................................................ V
目錄 ......................................................................... VI
圖索引 ..................................................................... IX
表索引 ......................................................................... XII
第一章 緒論 ................................................................ 1
1-1 前言 .................................................................. 1
1-2 有機發光元件發展史 ............................................ 2
第二章 文獻回顧 ............................................................... 5
2-1 ITO free之應用 ......................................................... 5
2-2 黃光元件 .................................................................. 7
2-3 製備高性能OLED ............................................... 8
2-3-1 激基複合物 ................................................... 8
2-3-2 電子注入層 .......................................................... 9
2-4 有機發光二極體之物理機制................................... 11
2-4-1 基礎理論 .................................................... 11
2-4-2 電致發光原理 .............................................. 12
2-4-3 主客體發光機制 .......................................... 12
2-4-4 微共振腔現象 .............................................. 15
2-5 研究動機與目的 ...................................................... 16
第三章 製程介紹 .................................................................. 17
3-1 實驗設備 ........................................................ 17
3-1-1 3D印表機 .......................................................... 17
3-1-2 超音波振盪機 .............................................. 17
3-1-3 溫控加熱板 ............................................. 18
3-1-4 曝光機 ........................................................ 19
3-1-5 材料昇華系統 ................................................ 19
3-1-6 氮氣手套箱 .................................................. 20
3-1-7 濺鍍機 ............................................................ 21
3-1-8 熱蒸鍍機 ........................................................... 21
3-1-9 雷雕機 ................................................................. 22
3-1-10 原子層沉積系統 ........................................ 23
3-1-11 化學氣相沉積系統 .............................................. 23
3-2 實驗流程 ...................................................................... 24
3-2-1 前清洗 ............................................................ 24
3-2-2 熱蒸鍍製程 ......................................................... 25
3-2-3 基板封裝 .......................................................... 26
3-2-4 化學氣相沉積系統 .................................... 27
3-2-5 原子層沉積系統 ..................................................... 27
3-3 分析設備 ............................................................. 28
3-3-1 探針式膜厚儀 (α-step) ....................................... 28
3-3-2 橢偏儀 ...................................................... 28
3-3-3 輝度計 .......................................................... 29
3-3-4 積分球 ................................................................ 30
3-3-5 lifetime系統 ................................................. 30
3-3-6 變角度分析 ..................................................... 31
3-4 實驗材料 ............................................................. 32
第四章 實驗結果與討論 ............................................. 34
4-1 標準正置型黃光元件 .............................................. 34
4-2 倒置型黃光元件 ............................................... 36
4-2-1 電子注入層測試 .......................................... 36
4-2-2 微共振腔厚度優化 ....................................... 40
4-2-3 覆蓋膜應用 .............................................. 42
4-3 變角度分析 ................................................................ 46
4-4 lifetime量測 ................................................. 50
4-5 相關應用 ......................................................... 51
第五章 結果與未來展望 ...................................................... 58
參考文獻59
                                

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全文公開日期 2025/07/31 (校內網路)
全文公開日期 2025/07/31 (校外網路)
全文公開日期 2025/07/31 (國家圖書館：臺灣博碩士論文系統)

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