Regioisomeric Effects of Donor-Acceptor-Acceptor Small-Molecule Donors on the Open Circuit Voltage of Organic Photovoltaics

被引：42

作者：

Che, Xiaozhou ^{[1
]}

Chung, Chin-Lung ^{[2
]}

Liu, Xiao ^{[3
]}

Chou, Shu-Hua ^{[2
]}

Liu, Yi-Hung ^{[2
]}

Wong, Ken-Tsung ^{[2
,4
]}

Forrest, Stephen R. ^{[1
,3
,5
,6
]}

机构：

[1] Univ Michigan, Appl Phys Program, Ann Arbor, MI 48109 USA

[2] Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan

[3] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA

[4] Acad Sinica, Inst Atom & Mol Sci, Taipei 10617, Taiwan

[5] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[6] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

来源：

ADVANCED MATERIALS | 2016年 / 28卷 / 37期

关键词：

conjugation length; dipoles; organic solar cells; SOLAR-CELLS; SEMICONDUCTORS; PERFORMANCE;

D O I：

10.1002/adma.201601957

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Donor-acceptor-acceptor' small-mole cule donors are synthesized to investigate regioisomeric effects on organic photovoltaic device performance. Cross-conjugation in 2-((7-(N-(2-ethylhexyl)-benzothieno[3,2b]thieno[3,2-d]pyrrol-2-yl)benzo[c][1,2,5]thiadiazol-4-yl)methylene) malononitrile leads to an increased open-circuit voltage compared with its isomer 2-((7-(N-(2-ethylhexyl)-benzothieno[3,2-b]thieno[2,3-d]pyrrol-2-yl)benzo[c][1,2,5]thiadiazol-4-yl)methylene) malononitrile. A correlation is then established between molecular conjugation length and orbital energies, and hence open-circuit voltage.

引用

页码：8248 / 8255

页数：8

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