臺灣博碩士論文加值系統

有機發光二極體(organic light-emitting device, OLED)具有低驅動電壓以及可以適用在大尺寸的可撓性基板等優點。其近紅外光波段在通訊、偵測、生醫等應用上相當具有發展潛力。但是複雜的多層結構以及低功函數的金屬電極卻限制了有機發光二極體的發展。固態有機發光電化學元件(light-emitting electrochemical cell, LEC)提供了新的構思，使得有機發光電化學元件相較於有機發光二極體有著許多突破性的發展，有機發光電化學元件的單層元件結構使得在製程變成更加的簡易、成本也大幅地降低。本實驗採用溶液製作單層結構元件，以氧化銦錫薄膜玻璃與銀做為元件的陽極與陰極，發光層則使用一系列新穎的銥離子金屬錯合物，進行頻譜光色、電流密度、元件亮度以及效率的探討。在過去文獻中，並沒有使用銥離子金屬錯合物製作的近紅外光有機電化學元件能提供發光峰值波長在750 nm之後的研究報告，而在本實驗中使用了一系列的銥離子金屬錯合物所製作的近紅外光有機電化學元件，能得到發光峰值波長達800 nm左右，這是相關研究領域的新突破，相當具有應用潛力。

Orangic light-emitting devices (OLED) have attracted attention in near-infrared (NIR) applications due to advantages of low power consumption and compatibility with large area and flexible substrates. But OLED typically require sophisticated multilayer structures and low-work-function cathodes to optimize device efficiencies, which limits their commercial realization. Solid-state light-emitting electrochemical cells (LEC) provide solution processablility, simple device architecture and compatibility with air stable metals, which can be more easily processed and thus reduce the fabrication cost. In this work, NIR LEC based on several novel cationic Iridium complexes were fabricated. Electroluminescence (EL) properties of these devices were measured and discussed. No reported LEC based on cationic Iridium complexes offer NIR EL peak wavelength >750 nm. In this work, several novel cationic iridium complexes are proposed to exhibit EL peak wavelength at ~800 nm. Such EL peak wavelength is among the longest reported and these devices have great potential in applications.

摘要 I
Abstract II
致謝 III
第一章 緒論 1
1.1前言 1
1.2有機發光二極體介紹 1
1.3有機發光電化學元件簡介 5
1.4離子性過渡金屬錯合物有機發光電化學元件之簡介 6
1.5近紅外光有機電化學元件文獻回顧 8
1.6研究動機與目的 16
第二章 理論基礎 17
2.1激子形成機制 17
2.1.1非輻射複合 18
2.1.2輻射複合 18
2.2主客體摻雜發光系統 19
2.2.1能量轉移機制 19
2.2.2載子捕捉機制 20
2.3有機發光電化學元件發光機制 20
2.3.1電化學模型 21
2.3.2電動力學模型 21
2.4電激發光元件電流機制 22
2.4.1空間電荷限制電流 22
2.4.2注入電荷限制電流 23
2.5有機發光元件效率之計算 24
2.6元件亮度及效率之計算 25
2.6.1元件亮度表示 25
2.6.2發光元件功率量測 26
2.6.3發光元件之外部量子效率 27
2.6.4發光元件之能量轉換效率 28
第三章 實驗流程及製程介紹 29
3.1 實驗設備介紹 29
3.2元件製程步驟 32
3.3實驗量測架構 34
3.3.1儀器介紹 34
3.3.2元件量測 35
3.4有機發光電化學元件結構及材料 36
3.4.1有機發光電化學元件材料 36
3.4.2有機發光電化學元件結構 37
第四章 實驗結果分析 38
4.1實驗設計與製程簡述 38
4.1.1實驗材料及配製 38
4.1.2元件結構 39
4.1.3元件製程 40
4.2實驗結果分析與討論 41
4.2.1有機電化學元件之光激發光頻譜分析 41
4.2.2有機電化學元件之電激發光頻譜分析 42
4.2.3有機電化學元件之電性分析 44
第五章 結論 48
參考文獻 49

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