Highly efficient bulk heterojunction photovoltaic cells based on C 70 and tetraphenyldibenzoperiflanthene

Yan Qiong Zheng, William J. Potscavage, Takeshi Komino, Masaya Hirade, Junji Adachi, Chihaya Adachi

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Abstract

Highly efficient photovoltaic cells based on a bulk heterojunction configuration composed of C70 with various donor materials at 5 wt.% donor concentration were fabricated. The tetraphenyldibenzoperiflanthene (DBP) donor achieved the highest power conversion efficiency (ηPCE) of 6.4% for the optimized cell. The improved performance with DBP arises from a combination of a higher absorption coefficient than 1,1-bis-(4-bis(4-methyl- phenyl)-amino-phenyl)-cyclohexane and a symmetrical molecular structure. The high ηPCE with only 5 wt. donor is attributed to a sufficient donor concentration for enhanced Frenkel exciton dissociation in C70, while efficiency and electron mobility decrease at higher donor concentrations.

Original languageEnglish
Article number143304
JournalApplied Physics Letters
Volume102
Issue number14
DOIs
Publication statusPublished - Apr 8 2013

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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