期刊
MACROMOLECULAR CHEMISTRY AND PHYSICS
卷 211, 期 24, 页码 2596-2601出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201000430
关键词
bis(thiophene)phthalimide; conjugated polymers; open-circuit voltage; photovoltaics
资金
- National Nature Science Foundation of China (NSFC) [20674049, 20834005]
- Shanghai Municipal Government [B202, 10ZZ15]
Two new donor/acceptor copolymers PBDTPhBT1 and PBDTPhBT2 with alternating benzodithiophene (BDT) and bisthiophene-phthalimide (PhBT) units were synthesized by Stille coupling reaction. The copolymers showed identical optical bandgaps of 1.98 eV. The HOMO energy levels are -5.35 and -5.32 eV for PBDTPhBT1 and PBDTPhBT2, respectively. The bulk heterojunction solar cell devices based on these copolymers as donors and PC71BM as acceptor displayed high open-circuit voltages of 0.90-0.93 V and achieved power conversion efficiency of 1.54% under the illumination of AM 1.5, 100 mW.cm-2
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