Issue 16, 2023

Underlayer engineering of grain strain toward efficient and stable tin perovskite solar cells

Abstract

Lead-free tin perovskite solar cells (TPSCs) have gained prominence as a promising green photovoltaic technology. However, the rapid crystallization of tin perovskites leads to residual strain within the film, generating a large number of deep-level defects, which severely restrict the enhancement of power conversion efficiency (PCE) and lifetime of TPSCs. Here, we have developed an underlayer engineering strategy to release the residual compressive strain of tin perovskite films through the design of long-chain alkylamines as crystallization buffer molecules, which enhanced the photovoltaic performance and stability of TPSCs. Through tuning the backbone length of the alkylamines to modify the interface between the perovskite and hole transporting layer (HTL), octadecanammonium iodide (ODAI) was demonstrated to be the most effective to produce high-crystallinity and strain-free tin perovskite films. Moreover, the released residual strain can reduce the trap state density and suppress the nonradiative recombination in tin perovskite thin films. The resulting device with an ODAI underlayer achieved a champion PCE of 13.82% and a voltage of 0.818 V, respectively, maintained over 92% and 88% of initial PCE under continuous one sunlight illumination and 65° heating for 1000 hours.

Graphical abstract: Underlayer engineering of grain strain toward efficient and stable tin perovskite solar cells

Supplementary files

Article information

Article type
Research Article
Submitted
04 مارٕچ 2023
Accepted
11 میٔ 2023
First published
26 میٔ 2023

Mater. Chem. Front., 2023,7, 3406-3413

Underlayer engineering of grain strain toward efficient and stable tin perovskite solar cells

B. Li, Z. Li, D. Gao, X. Wu, X. Li, C. Zhang, S. Li, J. Gong, D. Zhang, X. Xie, S. Xiao, H. Lu, M. Li and Z. Zhu, Mater. Chem. Front., 2023, 7, 3406 DOI: 10.1039/D3QM00236E

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