TY - JOUR
T1 - Interpenetrating interfaces for efficient perovskite solar cells with high operational stability and mechanical robustness
AU - Dong, Qingshun
AU - Zhu, Chao
AU - Chen, Min
AU - Jiang, Chen
AU - Guo, Jingya
AU - Feng, Yulin
AU - Dai, Zhenghong
AU - Yadavalli, Srinivas K.
AU - Hu, Mingyu
AU - Cao, Xun
AU - Li, Yuqian
AU - Huang, Yizhong
AU - Liu, Zheng
AU - Shi, Yantao
AU - Wang, Liduo
AU - Padture, Nitin P.
AU - Zhou, Yuanyuan
N1 - Funding Information:
The work at Brown University was funded by the National Science Foundation (Grant No. OIA-1538893). The work at the Dalian University of Technology was financially supported by the National Natural Science Foundation of China (Grant Nos. 51773025, 22005043, and 51872036), Natural Science Foundation of Liaoning Province, China (Grant No. 20180510027), Dalian Science and Technology Innovation Fund (Grant No. 2019J12GX032), and China Postdoctoral Science Foundation (Grant Nos. 2019TQ0046 and 2020M680941). Experimental assistance from Mr. T. Shen, Dr. B. Zhao, Mr. J. Zhang, Dr. X. Jiang, and Prof. X. Song is also acknowledged.
PY - 2021/2/12
Y1 - 2021/2/12
N2 - The perovskite solar cell has emerged rapidly in the field of photovoltaics as it combines the merits of low cost, high efficiency, and excellent mechanical flexibility for versatile applications. However, there are significant concerns regarding its operational stability and mechanical robustness. Most of the previously reported approaches to address these concerns entail separate engineering of perovskite and charge-transporting layers. Herein we present a holistic design of perovskite and charge-transporting layers by synthesizing an interpenetrating perovskite/electron-transporting-layer interface. This interface is reaction-formed between a tin dioxide layer containing excess organic halide and a perovskite layer containing excess lead halide. Perovskite solar cells with such interfaces deliver efficiencies up to 22.2% and 20.1% for rigid and flexible versions, respectively. Long-term (1000 h) operational stability is demonstrated and the flexible devices show high endurance against mechanical-bending (2500 cycles) fatigue. Mechanistic insights into the relationship between the interpenetrating interface structure and performance enhancement are provided based on comprehensive, advanced, microscopic characterizations. This study highlights interface integrity as an important factor for designing efficient, operationally-stable, and mechanically-robust solar cells.
AB - The perovskite solar cell has emerged rapidly in the field of photovoltaics as it combines the merits of low cost, high efficiency, and excellent mechanical flexibility for versatile applications. However, there are significant concerns regarding its operational stability and mechanical robustness. Most of the previously reported approaches to address these concerns entail separate engineering of perovskite and charge-transporting layers. Herein we present a holistic design of perovskite and charge-transporting layers by synthesizing an interpenetrating perovskite/electron-transporting-layer interface. This interface is reaction-formed between a tin dioxide layer containing excess organic halide and a perovskite layer containing excess lead halide. Perovskite solar cells with such interfaces deliver efficiencies up to 22.2% and 20.1% for rigid and flexible versions, respectively. Long-term (1000 h) operational stability is demonstrated and the flexible devices show high endurance against mechanical-bending (2500 cycles) fatigue. Mechanistic insights into the relationship between the interpenetrating interface structure and performance enhancement are provided based on comprehensive, advanced, microscopic characterizations. This study highlights interface integrity as an important factor for designing efficient, operationally-stable, and mechanically-robust solar cells.
UR - http://www.scopus.com/inward/record.url?scp=85100856185&partnerID=8YFLogxK
U2 - 10.1038/s41467-021-21292-3
DO - 10.1038/s41467-021-21292-3
M3 - Journal article
C2 - 33579915
AN - SCOPUS:85100856185
SN - 2041-1723
VL - 12
JO - Nature Communications
JF - Nature Communications
M1 - 973
ER -
