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Highly efficient bulk heterojunction photovoltaic cell based on tris[4-(5-phenylthiophen-2-yl)phenyl]amine and C70 combined with optimized electron transport layer

Authors :
Takeshi Komino
Chihaya Adachi
Yan Qiong Zheng
William J. Potscavage
Source :
Applied Physics Letters. 102:153302
Publication Year :
2013
Publisher :
AIP Publishing, 2013.

Abstract

Efficient bulk heterojunction (BHJ) photovoltaic cells (PVs) based on 5 wt. % donors and C70 were fabricated. Tris[4-(5-phenylthiophen-2-yl)phenyl]-amine (TPTPA)-based BHJ PVs show higher power conversion efficiency (ηPCE) than aluminum phthalocyanine chloride-based BHJ PVs. Although the absorption of AlPcCl is complementary to that of C70, TPTPA's high hole mobility and symmetrical molecular structure are likely to be crucial contributing factors to the higher ηPCE. Phase separation occurs in the 5%-TPTPA blend. The device was optimized via replacement of the bathocuproine buffer by a combination of 3,4,9,10-perylenetetracarboxylic bis-benzimidazole and bathocuproine. ηPCE of 5.96% is achieved because of the decreased series resistance.

Details

ISSN :
10773118 and 00036951
Volume :
102
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........f8f10399df84e4bbf3db08f41c063432
Full Text :
https://doi.org/10.1063/1.4801954