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Journal of Photonics for Energy

Mixed solvents for reproducible photovoltaic bulk heterojunctions
Author(s): Zhongqiang Wang; Ergang Wang; Lintao Hou; Fengling Zhang; Mats R. Andersson; Olle Inganäs
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Paper Abstract

Most efficient polymer solar cells are usually fabricated from toxic organic solvents, such as chloroform, chlorobenzene, or dichlorobenzene (ODCB). Here, we demonstrate a power conversion efficiency of 4.5% in solar cells with a new blue polymer poly[2,3-bis-(3-octyloxyphenyl)quinoxaline-5,8-diyl-alt-thiophene-2,5-diyl] (TQ1) mixed with PC71BM and processed from mixed solvents of toluene and ODCB in a ratio of 9:1. Decreasing the content of ODCB makes device processing more compatible with the environment for large scale production, with 10% reduction of photocurrent compared to devices from pure ODCB under optimized conditions. In addition, less variation of photocurrent is obtained in solar cells processed from mixed solvents than from pure ODCB due to varying nanostructure in the blends, which is also critical for production.

Paper Details

Date Published: 1 January 2011
PDF: 8 pages
J. Photon. Energy 1(1) 011122 doi: 10.1117/1.3606393
Published in: Journal of Photonics for Energy Volume 1, Issue 1
Show Author Affiliations
Zhongqiang Wang, Linköping Univ. (Sweden)
Ergang Wang, Chalmers Univ. of Technology (Sweden)
Lintao Hou, Linköping Univ. (Sweden)
Fengling Zhang, Linköping Univ. (Sweden)
Mats R. Andersson, Chalmers Univ. of Technology (Sweden)
Olle Inganäs, Linköping Univ. (Sweden)

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