Journal of Photopolymer Science and Technology
Online ISSN : 1349-6336
Print ISSN : 0914-9244
ISSN-L : 0914-9244
Visible Sensitization for Non-Fullerene Polymer Solar Cells Using a Wide Bandgap Polymer
Yanbin WangHyung Do KimBiaobing WangHideo Ohkita
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2018 Volume 31 Issue 2 Pages 177-181

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Abstract

Non-fullerene polymer solar cells based on blends of a middle-bandgap polymer, poly[(2,6-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b']dithiophene)-co-(1,3-di(5-thiophene-2-yl)-5,7-bis(2-ethylhexyl)-benzo[1,2-c:4,5-c’]dithiophene-4,8-dione)] (PBDB-T) and a low-bandgap non-fullerene derivative (IT-M) exhibit improved short-circuit current density (JSC) by incorporating a wide-bandgap polymer, poly[5,5'-bis(2-butyloctyl)-(2,2'-bithiophene)-4,4'-dicarboxylate-alt-5,5'-2,2'-bithiophene] (PDCBT). This is mainly due to the enhanced absorption efficiency in the visible region for ternary devices. As a result, the power conversion efficiency (PCE) was increased up to 11.2% for the ternary blend device.

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© 2018 The Society of Photopolymer Science and Technology (SPST)
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