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π-Extended low bandgap polymer based on isoindigo and thienylvinylene for high performance polymer solar cells

Cited 48 time in Web of Science Cited 53 time in Scopus
Authors
Jung, Eui Hyuk; Jo, Won Ho
Issue Date
2013
Publisher
Royal Society of Chemistry
Citation
Energy & Environmental Science Vol.2014 No.7, pp. 650-654
Keywords
공학
Abstract
A π-extended low bandgap polymer (PiITVT) consisting of isoindigo and thienylvinylene is synthesized and used as an active layer material for polymer solar cells. PiITVT-based polymer solar cells exhibited a high power conversion efficiency of 7.09%, which is higher than that of PiI2T (5.55%), because of the better coplanar structure of the TVT unit than the 2T unit.

Low bandgap conjugated polymers based on a donor–acceptor (D–A) structure are an emerging class of donor materials for high performance polymer solar cells (PSCs). Molecular design and synthesis of conjugated polymers and deep understanding of the relation between chemical structure and photophysical properties are crucial to develop high performance PSCs. One of the effective approaches to develop efficient conjugated polymers is to strengthen the intermolecular interaction between conjugated polymer chains by enhancing their molecular orbital overlap. For this purpose, we synthesized a p-extended low bandgap polymer composed of thienylvinylene and isoindigo, which exhibits high crystallinity, low-lying highest occupied molecular orbital level and favorable molecular orientation in a blend film with PCBM. The PSC device shows a promising power conversion efficiency of 7.1%. Hence, thienylvinylene is a promising building block for constructing high performance conjugated polymers.
ISSN
1754-5692 (print)
1754-5706 (electronic)
Language
English
URI
https://hdl.handle.net/10371/91373
DOI
https://doi.org/10.1039/C3EE42297F
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
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