新型雙極性含相連三芳環有機材料之合成及其應用於染敏化太陽能電池與電激發光元件

New Types of Dipolar Materials with Triaryl Linkages and Applications on Dye-Sensitized Solar Cells and Organic Light Emitting Diodes

張源杰(Yuan-Jay Chang)

指導教授 ： 周大新

國立臺灣大學/理學院/化學研究所/博士(2009年)

https://doi.org/10.6342/NTU.2009.02252

摘要

(1)有機染敏化太陽能電池研究(DSSCs): 利用予體-橋體-受體(Donor-Bridge-Acceptor; DBA)系統來設計分子架構，直線型DBA分子有著強的分子偶極，利用diphenyl amine及其衍生物di-p-tolyl-amine 、bis(4-methoxyphenyl)amine及N-phenyl-
naphthalen-1-amine為電子予體，使用Pd(OAc)2、dppf催化之下與各種不同的架橋分子進行碳-氮，並保留含有溴的另一活化端，再加入正丁基鋰(n-butyl lithium)及N,N-二甲基甲醯胺(N,N-dimethylformamide; DMF)於低溫下將活化端置換成醛基，最後再與cyanoacetic acid 進行Knoevenagel condensation於分子末端建構出含有末端酸基的電子受體，再與二氧化鈦製作成太陽能電池元件，並測量得到光電轉換效率。化合物(4-PSP)有最好的光電轉換效率為(7.08%)，已達N719的九成。
(2)有機發光二極體(OLED): 目前研究紅光染料及其發光性質，因為紅光對眼睛敏感度差，且能階差小，能量很容易以非放光型態消失，所以設計飽和的紅光材料不易。本研究是將典型的DCM與DCJTB，分別為黃光及紅光螢光效率最好的材料進行改良，引入立體障礙較大與較強推電子基團，防止堆疊並且增加其發光效率，發光元件是以混掺方式製作，利用Alq3當主發光體，紅光染料為客發光體，在適當比例下進行能量轉移，以有效提升紅光發光元件的效率，化合物(J-O-5-1)外部量子效率為3.07%、發光效率5.60 cd/A、流明效率為2.39 lm/W，最大亮度為59624 cd/m2 ，CIE(x,y)為 (0.63,0.37)。

關鍵字

染敏化太能電池 ； 有機發光二極體 ； 紅光材料

並列摘要

1. Organic Dyes Sensitized Solar Cells (DSSCs): New organic dyes that contain variable functional groups of spacer, and that materials show promise as a low-cost solar cells. However, the interest for metal-free, organic dyes with high extinction coefficients has grown in recent years. We constructed new dipolar donor-bridge-acceptor (DBA) series as the structure of materials contain variable spacer, and triphenylamine and its derivatives as donor/cyanoacrylic acid as acceptor and as anchoring group for attachment on the TiO2. The spacer to alternate with oligothiophene and oligo (1,4-phenylene) that has a greater tendency to be coplanar. In our study, we design and synthesis of compound (4-PSP), it has high solar-to-energy conversion efficiency (7.08%).

2. Organic Light Emitting Diodes (OLED): This research is carries on typical DCM and the DCJTB two kind of at present red fluorescence efficiency best material the improvement. Inserts the strong electron donating groups and bases with bulky group to prevent aggregation and enhance its luminance efficiency. Use the dopant way of manufacture, for using Alq3 works as host, the dye as guest, carries on the energy transfer under the suitable proportion, take the effective promotion red illumination efficiency. Compound (J-O-5-1) presents external quantum efficiency of 3.07%, current efficiency of 5.60 cd/A, power efficiency of 2.39 lm/W, the greatest brightness is 59624 cd/m2, and CIE(x,y) = (0.63,0.37)。

並列關鍵字

Dye-Sensitized Solar Cells ； Organic Light Emitting Diodes

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