探討染料的支鏈效應於染料敏化太陽能電池之應用

Tribranched Dipolar Organic Sensitizers for Dye-Sensitized Solar Cells

程揚瑞(Yang-Rui Cheng)

指導教授 ： 吳春桂 ； 孫世勝

國立中央大學/理學院/化學系/碩士(2012年)

摘要

本論文探討以咔唑(carbazole)為推電子端，羧酸根為拉電子基，中間以噻吩 (thiophene)、喹啉(quinoxaline)、thieno[3,2-b]thiophene (TT)作為共軛片段，成功合成以(Donor-π conjugated system-Acceptor (D-π-A) 形式的染料DB系列染料以及合成了三芽結構染料DB163，分別進行了核磁共振結構鑑定、高解析質譜結構鑑定、紫外光-可見光吸收光譜、循環伏特安培法、太陽能電池的光電轉換效率EIS (electrochemical impedance spectroscopy) 等的實驗。以 AM 1.5 irradiation (100 mW/cm2) 所測得光電轉換效率，以 DB98(η= 4.90%)為最高Jsc = 10.8 mA/cm2、Voc = 703 mV、ff = 0.64、η = 4.90%，而三芽染料DB163為η= 3.00%，效果不如預期可能原因為其吸附量較差，導致整體電流不加使效率下降。

關鍵字

支鏈效應 ； 染料敏化太陽能電池

並列摘要

In this study, we discuss novel organic dyes (DB dyes), which have a carbazole as an electron donor and a cyanoacrylic acid moiety as an electron acceptor and an anchoring group, connected with thiophenes, quinoxaline, thieno[3,2-b]thiophene as a π-conjugated system, and also synthesized tribranched structure dye DB163 for application in dye-sensitized solar cells (DSSCs),
The photophysical and electrochemical properties of these dyes were studied in detailed. The higher performances were obtained by DSSCs based on dye DB98. The solar-to-electrical energy conversion efficiency (?) of 4.9% is achieved under simulated AM 1.5 irradiation (100 mW/cm2), and tribranched structure dye DB163 (??= 3.00 %) was not as effective as expected may be due to poor dye loading which leads overall efficiency low.

並列關鍵字

branched ； dye-sensitized solar cells

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