Ultra-high open-circuit voltage of tin perovskite solar cells via an electron transporting layer design

Xianyuan Jiang, Fei Wang, Qi Wei, Hansheng Li, Yuequn Shang, Wenjia Zhou, Cheng Wang, Peihong Cheng, Qi Chen, Liwei Chen and Zhijun Ning ()
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Xianyuan Jiang: ShanghaiTech University
Fei Wang: ShanghaiTech University
Qi Wei: ShanghaiTech University
Hansheng Li: ShanghaiTech University
Yuequn Shang: ShanghaiTech University
Wenjia Zhou: ShanghaiTech University
Cheng Wang: ShanghaiTech University
Peihong Cheng: ShanghaiTech University
Qi Chen: Chinese Academy of Sciences
Liwei Chen: Chinese Academy of Sciences
Zhijun Ning: ShanghaiTech University

Nature Communications, 2020, vol. 11, issue 1, 1-7

Abstract: Abstract Tin perovskite is rising as a promising candidate to address the toxicity and theoretical efficiency limitation of lead perovskite. However, the voltage and efficiency of tin perovskite solar cells are much lower than lead counterparts. Herein, indene-C60 bisadduct with higher energy level is utilized as an electron transporting material for tin perovskite solar cells. It suppresses carrier concentration increase caused by remote doping, which significantly reduces interface carriers recombination. Moreover, indene-C60 bisadduct increases the maximum attainable photovoltage of the device. As a result, the use of indene-C60 bisadduct brings unprecedentedly high voltage of 0.94 V, which is over 50% higher than that of 0.6 V for device based on [6,6]-phenyl-C61-butyric acid methyl ester. The device shows a record power conversion efficiency of 12.4% reproduced in an accredited independent photovoltaic testing lab.

Date: 2020
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DOI: 10.1038/s41467-020-15078-2

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