首页|Facile lattice tensile strain compensation in mixed-cation halide perovskite solar cells

Facile lattice tensile strain compensation in mixed-cation halide perovskite solar cells

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Despite the rapid development of power conversion efficiency(PCE)for halide perovskite solar cells(PSCs),the lattice strain engineering in perovskite thin films has been rarely probed in recent years.Herein,a strain compensation by homogeneous crystallization in perovskite films is achieved with the aid of precursor aging in the mixed-cation perovskite of Cs0.05(FA0.83MA0.17)Pb(I0.90Br0.10)3 with near 20％PCE in inverted devices.The homogeneous crystallization releases the residual tensile stress and induces more compressive stress at the edges of perovskite films,thus elongating the carrier lifetime and reducing the trap-assisted carrier recombination.The high dependence on the perovskite components in strain engineering strategy was systematically revealed,wherein MAPbl3 and Cs0.05(FA0.83MA0.17)Pbl3 film showed an increased compressive strain and FAPbI3 film showed adverse tensile strain after aging.The density functional theory(DFT)calculations are further performed to reveal the change of electronic features.The precursor aging-induced strain modulation was correlated with a systematic characterization of the charge carrier transport and recombination dynamics in the mixed-cation perovskite films.We believe that this facile approach provides a novel strain engineering strategy for PSCs technology.

Lattice strainCharge transferBr-ionsIdeal factorHybrid perovskite components

Shurong Wang、Jie Hu、Aili Wang、Yuying Cui、Bin Chen、Xiaobin Niu、Feng Hao

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School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 611731,Sichuan,China

National Natural Science Foundation of ChinaScience&Technology Department of Sichuan ProvinceRecruit-ment Program for Young Professionals

517020382020YFG0061

2022

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDCSCDSCIEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2022.66(3)
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