Novel D-A-π-A coumarin dyes containing low band-gap chromophores for dye-sensitised solar cells

被引：104

作者：

Seo, Kang Deuk ^{[1
,2
]}

Choi, In Tack ^{[1
,2
]}

Park, Young Geun ^{[3
]}

Kang, Sunwoo ^{[3
]}

Lee, Jin Yong ^{[3
]}

Kim, Hwan Kyu ^{[1
,2
]}

机构：

[1] Korea Univ, Dept Adv Mat Chem, Jochiwon 339700, Chungnam, South Korea

[2] Korea Univ, Ctr Adv Photovolta Mat, Jochiwon 339700, Chungnam, South Korea

[3] Sungkyunkwan Univ, Dept Chem, Suwon 440746, South Korea

来源：

DYES AND PIGMENTS | 2012年 / 94卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

Coumarin; Metal-free organic dyes; pi-bridge units; Dye-sensitised solar cell; Low band-gap chromophore; Benzothiadiazole; FREE ORGANIC-DYES; ELECTRON-INJECTION; NANOCRYSTALLINE TIO2; MOLECULAR-ENERGIES; HIGH-EFFICIENCY; PERFORMANCE; DERIVATIVES; DESIGN;

D O I：

10.1016/j.dyepig.2012.02.015

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Coumarin dyes containing a low band-gap chromophore of benzothiadiazole, which comprises a coumarin moiety as the electron donor and a cyanoacrylic acid moiety as electron acceptor in D-A-pi-A system, were developed to use in dye-sensitised solar cells (DSSCs). The introduction of the benzothiadiazole unit into the molecular framve distinctly narrowed the band-gap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), so that the absorption peak was red-shifted. As a result, a solar cell based on the HKK-CM4 sensitiser showed better photovoltaic performance with a J(SC) of 14.3 mA cm(-2), a V-OC of 0.58 V, and an FF of 0.72, corresponding to an overall conversion efficiency eta of 5.97% under standard AM 1.5 irradiation. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：469 / 474

页数：6

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