Design and synthesis of medium-bandgap small-molecule electron acceptors for efficient tandem solar cells?
Journal of Materials Chemistry A Pub Date: 2018-06-27 DOI: 10.1039/C8TA04405H
Abstract
Medium-bandgap small-molecule acceptors including YITI-0F, YITI-2F, and YITI-4F with a thiophene π-bridge are designed and synthesized. The PBDB-T:YITI-2F-based device shows the best photovoltaic performance with a PCE of up to 10.05%, a Voc of 0.93 V, a Jsc of 15.54 mA cm?2 and a FF of 69%. Tandem devices are fabricated by applying it as a front cell and the PTB7-Th:ATT-2-based device as a rear cell, giving a high PCE up to 11.86%.
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Journal Name：Journal of Materials Chemistry A
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CAS no.: 89640-58-4
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