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17 Aug 08:23

Tri-Diketopyrrolopyrrole Molecular Donor Materials for High-Performance Solution-Processed Bulk Heterojunction Solar Cells

by Jianhua Liu, Yanming Sun, Preecha Moonsin, Martijn Kuik, Christopher M. Proctor, Jason Lin, Ben B. Hsu, Vinich Promarak, Alan J. Heeger, Thuc-Quyen Nguyen
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Two new high-performance DPP-containing donor molecules employing a molecular architecture with three DPP chromorphores (tri-DPP) in conjugated backbones are synthesized and characterized. The two tri-DPP molecules with only a structural difference on alkyl substitutions, when blended with PC71BM, lead to power conversion efficiencies up to 4.8 and 5.5%, respectively.

22 Jul 01:22

Efficient Polymer Solar Cells Based on Benzothiadiazole and Alkylphenyl Substituted Benzodithiophene with a Power Conversion Efficiency over 8%

by Maojie Zhang, Yu Gu, Xia Guo, Feng Liu, Shaoqing Zhang, Lijun Huo, Thomas P. Russell, Jianhui Hou
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A new copolymer PBDTP-DTBT based on benzothiadiazole and alkylphenyl substituted benzodithiophene is synthesized and characterized. The correlation of the evolution of the morphology and photovoltaic performance is investigated. The power conversion efficiency of the polymer solar cells based on PBDTP-DTBT/PC71BM (1:1.5, w/w) reaches up to 8.07%, under the irradiation of AM 1.5G, 100 mW/cm2.