Fluorination of Polythiophene Derivatives for High Performance Organic Photovoltaics

被引：140

作者：

Jo, Jea Woong ^{[1
]}

Jung, Jae Woong ^{[1
]}

Wang, Hsin-Wei ^{[2
]}

Kim, Paul ^{[2
]}

Russell, Thomas P. ^{[2
]}

Jo, Won Ho ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea

[2] Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA

来源：

CHEMISTRY OF MATERIALS | 2014年 / 26卷 / 14期

关键词：

OPEN-CIRCUIT VOLTAGE; BAND-GAP POLYMERS; SIDE-CHAINS; SOLAR-CELL; BENZOTHIADIAZOLE; SUBSTITUENTS; COPOLYMERS; MORPHOLOGY; EFFICIENT; END;

D O I：

10.1021/cm502229k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

For the purpose of examining the tuning of photophysical property by fluorine atom substitution, fluorinated and nonfluorinated poly(3,4-dialkylterthiophenes) (PDATs) were synthesized, and their photovoltaic properties were compared. Fluorinated PDATs exhibit a deeper highest occupied molecular orbital energy level than nonfluorinated ones, leading to higher open-circuit voltage in organic solar cells and also enhanced molecular ordering as evidenced by a vibronic shoulder in UV-vis spectra, pi-pi scattering in GIWAXS, and a well-developed fibril structure in TEM, which contributes to efficient charge transport. As a result, the fluorine substitution increases the power conversion efficiency by 20% to 250% as compared with nonfluorinated PDATs.

引用

页码：4214 / 4220

页数：7

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