Simultaneous enhanced efficiency and thermal stability in organic solar cells from a polymer acceptor additive.

Nature Communications
Wenyan YangJie Min

Abstract

The thermal stability of organic solar cells is critical for practical applications of this emerging technology. Thus, effective approaches and strategies need to be found to alleviate their inherent thermal instability. Here, we show a polymer acceptor-doping general strategy and report a thermally stable bulk heterojunction photovoltaic system, which exhibits an improved power conversion efficiency of 15.10%. Supported by statistical analyses of device degradation data, and morphological characteristics and physical mechanisms study, this polymer-doping blend shows a longer lifetime, nearly keeping its efficiency (t = 800 h) under accelerated aging tests at 150 oC. Further analysis of the degradation behaviors indicates a bright future of this system in outer space applications. Notably, the use of polymer acceptor as a dual function additive in the other four photovoltaic systems was also confirmed, demonstrating the good generality of this polymer-doping strategy.

References

Oct 26, 2006·Journal of the American Chemical Society·Kevin SivulaJean M J Fréchet
Dec 15, 2016·The Journal of Physical Chemistry Letters·Fabian PanzerAnna Köhler
Jan 24, 2018·Nature Materials·Jianhui HouFeng Gao
Mar 21, 2018·Chemical Reviews·Guangye ZhangHe Yan
Apr 19, 2018·Proceedings of the National Academy of Sciences of the United States of America·Xiaomin XuTakao Someya
Jun 20, 2018·Advanced Materials·Hansol LeeKilwon Cho
Feb 8, 2019·Reports on Progress in Physics·Robert S GurneyTao Wang

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Citations

Aug 8, 2021·International Journal of Molecular Sciences·Sonia EmanueleMichela Giuliano

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Methods Mentioned

BETA
AFM
nuclear magnetic resonance
differential scanning calorimetry
atomic force microscopy
X-ray
thermal stress

Software Mentioned

GIWAXS

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