Abstract
An A-D-A-type small molecule, DCF-2HT, was synthesized using fluorene as the central block and 2-(2,3-dihydro-3-oxo-1H-inden-1-ylidene)propanedinitrile as the end groups, with one hexyl-substituted thiophene as a π bridge, for use as an acceptor material in organic solar cells. Devices based on DCF-2HT and the polymer donors PBDB-T or PTB7-Th were fabricated and optimized. Power conversion efficiencies of 5.71% and 4.83% were obtained for PBDB-T: DCF-2HT- and PTB7-Th: DCF-2HT-based devices, respectively.
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Liu, Y., Zhang, H., Sun, Y., Wan, X., & Chen, Y. (2017). A-D-A-type small molecular acceptor with one hexyl-substituted thiophene as π bridge for fullerene-free organic solar cells. Science China Materials, 60(1), 49–56. https://doi.org/10.1007/s40843-016-5155-2
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