From Event: SPIE Organic Photonics + Electronics, 2015
A library of low band gap small molecules with alkyldicyanovinyl acceptor and triphenylamine, tris(2- methoxyphenyl)amine or dithienosilole donor groups linked through (oligo)thiophene conjugated spacers was designed and successfully synthesized. Systematic variations of the alkyl chain length and the number of conjugated thiophene rings in the molecules allowed to elucidate the structure-properties relationships for their solubility, absorption spectra, phase behavior, morphology and structure in thin films, as well as photovoltaic properties. Bulk heterojunction organic solar cells prepared from these molecules as donors and PCBM as acceptor by solution processing showed power conversion efficiency up to 5.4 - 6.4%.
Yuriy N. Luponosov, Jie Min, Alexander N. Solodukhin, Sergei N. Chvalun, Tayebeh Ameri, Christoph J. Brabec, and Sergey A. Ponomarenko, "Design of low band gap small molecules with alkyldicyanovinyl acceptor and different donor groups for efficient bulk heterojunction organic solar cells," Proc. SPIE 9567, Organic Photovoltaics XVI, 95670W (Presented at SPIE Organic Photonics + Electronics: August 13, 2015; Published: 9 September 2015); https://doi.org/10.1117/12.2187454.
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