Yan Hao, Prof. Xichuan Yang, Meizhen Zhou, Jiayan Cong, Xiuna Wang, Prof. Anders Hagfeldt and Prof. Licheng Sun Molecular Design to Improve the Performance of Donor–π Acceptor Near-IR Organic Dye-Sensitized Solar Cells ChemSusChem 4
Near-dye experience: Long, flexible carbon chains in the lateral anchoring groups of the donor part of a donor–π acceptor organic dye increase the power conversion efficiency dramatically. This performance enhancement can be ascribed to the prevention of the formation of molecular aggregates on the semiconductor nanoparticles, resulting in a lower recombination rate between transported electrons and I3− ions. A cell based on the new dye, HY113, gives a maximum IPCE value of 93 % at 660 nm.
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