Issue 20, 2022

Strain-free hybrid perovskite films based on a molecular buffer interface for efficient solar cells

Abstract

Strain is ubiquitous in perovskite based photovoltaic cells, but can be hardly well released in most perovskite films, which usually has an adverse effect on devices' performance and lifetime. Here, a molecular buffer interface that enabled strain-free hybrid perovskite films is demonstrated via a sequential deposition method. A quaternary ammonium iodide buffer layer can effectively release the in-plane tensile stress of PbI2via its flexibility and weak interaction, which enlarges the PbI2 layer spacing and favors the subsequent perovskite phase conversion. Drift-diffusion simulations further suggest optimized interfacial band edges after the removal of residual PbI2, which enhances the charge extraction of solar cell devices. The optimized perovskite solar cell device attains an efficiency of 22.14% with a high fill factor of 0.846 and good long-term stability.

Graphical abstract: Strain-free hybrid perovskite films based on a molecular buffer interface for efficient solar cells

Supplementary files

Article information

Article type
Paper
Submitted
01 Mar 2022
Accepted
11 Apr 2022
First published
12 Apr 2022

J. Mater. Chem. A, 2022,10, 10865-10871

Strain-free hybrid perovskite films based on a molecular buffer interface for efficient solar cells

D. Liu, M. Chen, Z. Wei, C. Zou, X. Liu, J. Xie, Q. Li, S. Yang, Y. Hou and H. G. Yang, J. Mater. Chem. A, 2022, 10, 10865 DOI: 10.1039/D2TA01649D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements