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Fluorination of Polythiophene Derivatives for High Performance Organic Photovoltaics

Cited 116 time in Web of Science Cited 115 time in Scopus
Authors
Jo, Jea Woong; Jung, Jae Woong; Wang, Hsin-Wei; Kim, Paul; Russell, Thomas P.; Jo, Won Ho
Issue Date
2014-07
Publisher
American Chemical Society
Citation
Chemistry of Materials, Vol.2014 No.26, pp. 4214-4220
Keywords
공학
Abstract
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, π?π 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.
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, π−π 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.
ISSN
0897-4756
Language
English
URI
https://hdl.handle.net/10371/92834
DOI
https://doi.org/10.1021/cm502229k
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Material Science and Engineering (재료공학부) Others_재료공학부
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