Strategies to improve the mechanical robustness of metal halide perovskite solar cells

Muzhi Li; Samuel Johnson; Lidon Gil-Escrig; Maayan Sohmer; Carlos A. Figueroa Morales; Hongki Kim; Siraj Sidhik; Aditya Mohite; Xiwen Gong; Lioz Etgar; Henk J. Bolink; Axel Palmstrom; Michael D. McGehee; Nicholas Rolston

doi:10.1039/D3YA00377A

Strategies to improve the mechanical robustness of metal halide perovskite solar cells†

Muzhi Li,^a Samuel Johnson,^b Lidon Gil-Escrig,^c Maayan Sohmer,^d Carlos A. Figueroa Morales,^e Hongki Kim,^e Siraj Sidhik,^f Aditya Mohite,

^f Xiwen Gong,^e Lioz Etgar,

^d Henk J. Bolink,

^c Axel Palmstrom,^g Michael D. McGehee^b and Nicholas Rolston

*^a

Author affiliations

* Corresponding authors

^a Arizona State University, Tempe, Arizona, USA
E-mail: nicholas.rolston@asu.edu

^b University of Colorado Boulder, Boulder, Colorado, USA

^c University of Valencia, Valencia, Spain

^d The Institute of Chemistry, The Center for Nanoscience and Nanotechnology, Casali Center for Applied Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel

^e University of Michigan, Ann Arbor, Michigan, USA

^f Rice University, Houston, Texas, USA

^g National Renewable Energy Laboratory, Golden, Colorado, USA

Abstract

We report on the mechanical properties of high-efficiency perovskite solar cells (PSCs) with different chemical components by measuring the fracture energy (G_c) of films and devices. With the help of both macroscopic and microscopic techniques, we identify the locations where fracture takes place in the devices (either adhesive or cohesive failure) with various material and device structures. We propose strategies that can improve the fracture energy of PSCs based on the measured G_c: the use of ozone-nucleated atomic layer deposition to improve charge transport layer robustness and the use of 2D perovskites and morphology control to improve the perovskite robustness. Our findings offer a pathway to rationally study the mechanical properties of PSCs and enable such cells to be more mechanically robust to reach commercial viability.

This article is part of the themed collection: Perovskite solar cells – Topic Highlight

Energy Advances

Strategies to improve the mechanical robustness of metal halide perovskite solar cells†

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