High Performing Ternary Solar Cells through Förster Resonance Energy Transfer between Nonfullerene Acceptors

Nonradiative Förster resonance energy transfer (FRET) is an important mechanism of organic solar cells, which can improve the exciton migration over a long distance, resulting in improvement of efficiency of solar cells. However, the current observations of FRET are very limited, and the efficienci...

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Published in:ACS applied materials & interfaces 2017-08, Vol.9 (32), p.26928-26936
Main Authors: Yang, Lei, Gu, Wenxing, Hong, Ling, Mi, Yang, Liu, Feng, Liu, Ming, Yang, Yufei, Sharma, Bigyan, Liu, Xinfeng, Huang, Hui
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container_issue 32
container_start_page 26928
container_title ACS applied materials & interfaces
container_volume 9
creator Yang, Lei
Gu, Wenxing
Hong, Ling
Mi, Yang
Liu, Feng
Liu, Ming
Yang, Yufei
Sharma, Bigyan
Liu, Xinfeng
Huang, Hui
description Nonradiative Förster resonance energy transfer (FRET) is an important mechanism of organic solar cells, which can improve the exciton migration over a long distance, resulting in improvement of efficiency of solar cells. However, the current observations of FRET are very limited, and the efficiencies are less than 9%. In this study, FRET effect was first observed between two nonfullerene acceptors in ternary solar cells, which improved both the absorption range and exciton harvesting, leading to the dramatic enhancement in the short circuit current and power conversion efficiency. Moreover, this strategy is proved to be a versatile platform for conjugated polymers with different bandgaps, resulting in a remarkable efficiency of 10.4%. These results demonstrated a novel method to enhance the efficiency of organic soar cells.
doi_str_mv 10.1021/acsami.7b08146
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title High Performing Ternary Solar Cells through Förster Resonance Energy Transfer between Nonfullerene Acceptors
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