Thieno[3,4-b]thiophene-Based Organic Dyes for Dye-Sensitized Solar Cells

被引：43

作者：

Chen, Yung-Chung ^{[1
]}

Chou, Hsien-Hsin ^{[1
]}

Tsai, Ming Chih ^{[1
,2
]}

Chen, Sheng-Yu ^{[1
]}

Lin, Jiann T. ^{[1
]}

Yao, Ching-Fa ^{[2
]}

Chen, Kellen ^{[3
]}

机构：

[1] Acad Sinica, Inst Chem, Taipei 11529, Taiwan

[2] Natl Taiwan Normal Univ, Dept Chem, Taipei 117, Taiwan

[3] AU Optron Corp, Hsinchu 30078, Taiwan

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2012年 / 18卷 / 17期

关键词：

dye-sensitized solar cells; electron transfer; metal-free sensitizers; quantum chemistry; quinoids; RUTHENIUM SENSITIZERS; TRANSFER DYNAMICS; HIGHLY EFFICIENT; EXCITED-STATES; CHROMOPHORES; THIOPHENE; CONJUGATION; FLUORENE; DYADS; DONOR;

D O I：

10.1002/chem.201200012

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

New dipolar sensitizers containing an ethyl thieno[3,4-b]thiophene-2-carboxylate (ETTC) entity in the conjugated spacer have been synthesized in two isomeric forms. These compounds were used as the sensitizers of n-type dye-sensitized solar cells (DSSCs). The best conversion efficiency (5.31?%) reaches approximately 70?% of the N719-based (7.41?%) DSSC fabricated and measured under similar conditions. The ETTC-containing compounds exhibit a bathochromic shift of the absorption compared to their thiophene congeners due to the quinoid effect, however, charge-trapping at the ester group of ETTC was found to jeopardize the electron injection and lower the cell efficiency. Charge trapping is alleviated as the ester group of ETTC is replaced with a hydrogen atom, as evidenced from the theoretical computation.

引用

页码：5430 / 5437

页数：8

共 45 条

[1]

[Anonymous], 1986, Angew. Chem

[2]

[Anonymous], Q CHEM VERSION 4 0

[3]

Bessho T., 2010, Angew. Chem, V122, P6796

[4] Highly Efficient Mesoscopic Dye-Sensitized Solar Cells Based on Donor-Acceptor-Substituted Porphyrins [J].