Proceedings of 13th Conference on Hybrid and Organic Photovoltaics (HOPV21)
Publication date: 11th May 2021
The field of OPVs revitalized after the introduction of non-fullerene acceptors (NFAs) in organic active layer with device performance boosting up to 18.2% for single junction devices with 0.09 cm2 area. In present work the effect of second acceptor on the device performance and energy transfer mechanism has been studied. The Binary and ternary devices with PTB7-Th: COi8DFIC and PTB7-Th: COi8DFIC: PCBM with an active device area of 0.64 cm2 reached up to 12% and 10.8% power conversion efficiency respectively. The time resolved photoluminescence (TRPL) study confirmed the contribution of Förster resonance energy transfer (FRET) in better performance of these devices.
The authors acknowledge support from European Commission’s ‘CORNET’ & ‘MUSICODE’ programme and EPSRC grant.
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