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研究生:戴鴻奇
論文名稱:新穎之泛用主體材料應用在不同色彩的磷光有機發光二極體
論文名稱(外文):Novel universal host materials applied in multi-color PhOLEDs
指導教授:洪文誼
指導教授(外文):Wen-Yi Hung
學位類別:碩士
校院名稱:國立臺灣海洋大學
系所名稱:光電科學研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:79
中文關鍵詞:磷光有機發光二極體泛用主體材料
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本論文研究探討一系列雙極性通用主體材料製備成磷光發光元件,經由量測有機材料的物理特性、熱穩定性和載子遷移率等特性,並製備成元件,進而探討主體材料在元件中的表現。
第一部分,將會介紹兩個新雙極性主體材料,採用阻斷在咔唑與芴基團的9號碳間的  共軛鍵結,並且在芴分子的3號碳位置引入兩個吸電子基氰基與噁二唑基團。 CzFCN及CzFOxa展現出高的三重態能階 (分別為2.86 eV與2.70 eV)、分子型態穩定性以及平衡的雙極性載子遷移特性 (10‒5 ~ 10‒6 cm2 V‒1s‒1) 。使用這些材料做為主體材料摻雜各色的磷光,我們成功製作由藍光到紅光的高效率磷光元件,其效率為15.1%- 20%。此外,我們使用單一主體材料摻雜藍光、綠光及紅光設計白光元件,其元件的效率非常傑出,可高達17.3%, 33.7 cd A‒1, 30 lm W ‒1,演色性達到89.7,色彩穩定性也相當不錯 (電壓由7 V ~ 11 V ,CIEx = 0.44 – 0.45;CIEy = 0.43)。
在第二部分,我們以CzFCN的衍生物 (CzFCN2和CzDFCN) 做為主體材料,其效率比使用CzFCN為主體材料還要低。
第三部分,我們將介紹一系列以1,3,5 三聚腈為核心,在分子結構外圍引入不同的官能基,形成可以做為電子傳輸層材料,並可做為主體材料 (T2T、 3N-T2T和3P-T2T) ,進行物理特性的量測。而以1,3,5 三聚腈為核心,在外圍引入N雜環,可有利於電子的注入與傳輸,並提供以簡單元件結構來製作高效率磷光元件的可能性。在這些主體材料中,3P-T2T可同時作為主體材料與電子傳輸層,並摻雜各色磷光 (從藍光至紅光),其元件展現出較低的驅動電壓,而藍光有8 %、綠光15.7 %、黃光16.9 %、紅光16.4 %及白光10.8 %。

In this thesis, we study a series of bipolar universal host to apply in PhOLEDs. The morphological, thermal, photophysical properties and carrier mobility of these host materials are affected the device performance.
In the first part, two new bipolar host molecules by adoption of interrupted -conjugation at C9 carbon of fluorene unit between the electron donating carbazole and electron withdrawing CN/oxadiazole group at C3 position of fluorene moiety. CzFCN and CzFOxa exhibit high triplet energy (ET = 2.86 – 2.70 eV), morphological stabilities and bipolar character with balanced charge mobilities (10‒5 ~ 10‒6 cm2 V‒1s‒1). By employing these materials as host and doped with various color phosphors, we have successfully fabricated highly efficient PhOLEDs from blue to red (15.1%- 20%). Then, we design single-host WOLEDs within R-G-B colors. The white device can realize outstanding efficiency (17.3%, 33.7 cd A‒1, 30 lm W ‒1), CRI (89.7) and color stability trade-off (CIEx = 0.44 – 0.45 and CIEy = 0.43 at applied voltage of 7 to 11 V). In the second part, we developed CzFCN’s derivatives as universal bipolar host(CzFCN2 and CzDFCN), which showed lower efficiencies than that used CzFCN as host.
In the third part, a systematical comparison of physical properties and their dual-role (host and electron transport) applications of star-shaped 1,3,5-triazine-based ET-type hosts (T2T, 3N-T2T, and 3P-T2T) with differential peripheral groups was reported. The introduction of N-heterocyclic polar peripheries onto 1,3,5-triazine core gave evident benefit to the electron injection/transport properties, rendering efficient PhOLEDs with simpler device configuration feasible. Among these hosts, 3P-T2T can serve both as promising host and electron-transport material for various phosphors (from blue to red), which exhibited low operation voltages with maximum EQE of 8%, 15.7%, 16.9%, 16.4% and 10.8% for sky blue, green, yellow, red and white, respectively.

第一章 序論 8
1-1有機發光二極體元件 8
1-2 論文架構 10
第二章 實驗方法 13
2-1 緒論 13
2-2 有機材料昇華 13
2-3 熱物理性質 14
2-4 光物理量測 15
2-5 能階量測 16
2-6 載子漂移率量測 16
2-7 有機發光元件製備 18
2-8 發光元件之量測 19
第三章 以非共軛混合咔唑與芴為主體之雙極性主體材料製備高效率磷光元件 21
3-1 緒論 21
3-2 文獻探討 22
3-3 CzFCN與CzFOxa特性分析 26
3-3.1 CzFCN與CzFOxa 元件結構Ⅰ 30
3-3.2 CzFCN與CzFOxa 元件結構Ⅱ 39
3-4 CzFCN2與CzDFCN特性分析 48
3-4.1 CzFCN2與CzDFCN 元件結構 52
3-5 結論 60
第四章 利用具電子傳輸特性之1,3,5-三聚腈為核心製備高效率磷光有機發光二極體 63
4-1 緒論 63
4-2 文獻探討 63
4-3 特性分析 66
4-4 元件應用 69
4-5 結論 78

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