Strain-gradient-induced modulation of photovoltaic efficiency
Wang, Zhiguo (Nanchang University. School of Physics and Materials Science)
Zhong, Hongqiang (Nanchang University. School of Physics and Materials Science)
Liu, Zhiyong (Nanchang Hangkong University. School of Materials Science and Engineering)
Hu, Xiaotian (Nanchang University. School of Chemistry and Chemical Engineering)
Shu, Longlong (Nanchang University. School of Physics and Materials Science)
Catalan, Gustau (Institut Català de Nanociència i Nanotecnologia)

Date:	2025
Abstract:	In this paper, we show that strain gradients can greatly affect the total photovoltaic efficiency of perovskite solar cells. By adding the flexophotovoltaic effect on top of the standard photovoltaic effect of semiconductor junctions, the total output of perovskite photovoltaic devices can be either completely suppressed or greatly enhanced, depending on the relative sign of the strain gradient with respect to the semiconductor junction polarity. The results thus indicate that, whether as a threat to efficiency or as a means to enhance it, strain gradients can greatly affect the performance of perovskite solar cells, and flexoelectric engineering is thus an indispensable step in the pursuit of maximal photovoltaic efficiency.
Grants:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-0129 Agencia Estatal de Investigación PID2023-148673NB-I00 Agencia Estatal de Investigación CEX2021-001214-S
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Flexoelectricity ; Photovoltaic effect ; Flexophotovoltaic effect ; Halide perovskites ; Solar cells ; Strain gradient ; Photovoltaic efficiency ; Strain engineering
Published in:	Matter, Vol. 8, Issue 3 (March 2025) , art. 101930, ISSN 2590-2385

DOI: 10.1016/j.matt.2024.11.024

Available from: 2026-03-31 Postprint

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles