Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 95, Issue 1, Pages 361-364Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2009.12.013
Keywords
Polymer solar cell; Photo-oxidation
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We report the fabrication of long-lived polymer solar cells using a new donor-acceptor type alternating copolymer, poly(5,5,10,10-tetrakis(2-ethylhexyl)-5,10-dihydroindeno[2,1-alpha]indene-2,7-diyl)-co-4,7-di-2-thienyl-2,13-benzothiadiazole (PININE-DTBT) in bulk heterojunction composites with the fullerene derivative [6,6]-phenyl C-70-butyricacidmethyl ester (PC70BM). The PININE-DTBT:PC70BM solar cells exhibit an extended device lifetime (as compared with other polymer systems) with a reasonable power conversion efficiency of similar to 2.7% under air mass 1.5 global (AM 1.5 G) irradiation of 100 mW/cm(2). The long-lived feature of the devices originates from the photo-oxidation resistant backbone unit and the deep HOMO (highest occupied molecular orbital) level of PININE-DTBT. (c) 2009 Elsevier B.V. All rights reserved.
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