Non-fullerene polymer solar cells based on a low bandgap polymer PTB7-Th and an ultra-narrow bandgap acceptor ACS8 exhibited an optimal PCE of 13.2%, indicating that the blend of PTB7-Th/ACS8 has potential for the practical applications of PSCs.
A novel chlorine and alkylsilyl substituted polymer PBZ-ClSi was synthesized and the nonhalogen solvent-processed PSCs achieved an efficiency of 12.8%.
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