Strained hybrid perovskite thin films and their impact on the intrinsic stability of perovskite solar cells

By Jingjing Zhao, Yehao Deng, Haotong Wei, Xiaopeng Zheng, Zhenhua Yu, Yuchuan Shao, J. Shield, Jinsong Huang. Science Advances, 2017

768 citations recorded by the source corpus.

Strain discovered in hybrid perovskite films made by existing methods affects perovskite solar cells’ intrinsic stability. Organic-inorganic hybrid perovskite (OIHP) solar cells have achieved comparable efficiencies to those of commercial solar cells, although their instability hinders their commercialization. Although encapsulation techniques have been developed to protect OIHP solar cells from external stimuli such as moisture, oxygen, and ultraviolet light, understanding of the origin of the intrinsic instability of perovskite films is needed to improve their stability. We show that the OIHP films fabricated by existing methods are strained and that strain is caused by mismatched thermal expansion of perovskite films and substrates during the thermal annealing process. The polycrystalline films have compressive strain in the out-of-plane direction and in-plane tensile strain. The strain accelerates degradation of perovskite films under illumination, which can be explained by increased ion migration in strained OIHP films. This study points out an avenue to enhance the intrinsic stability of perovskite films and solar cells by reducing residual strain in perovskite films.

Subfields: Electrical and Electronic Engineering, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/b98d2c1cfc8edb40e090e977d62d3dd799bca754

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Electrical and Electronic Engineering

1. Haotong Wei
2. I. Mora‐Seró
3. Jinsong Huang
4. N. Park
5. Yang Yang
6. Yong-bo Yuan
7. Juan Bisquert

In Polymers and Plastics

1. I. Mora‐Seró
2. Jinsong Huang

Citations in the corpus

• Stabilization of Black Perovskite Phase in FAPbI3 and CsPbI3 (2020, background): “This effect occurs when the strain originates from the thermal expansion mismatch of the perovskite lattice parameter with the substrates.(79)”