Ambient operando self-healing in tin perovskite solar cells.

ABSTRACT: Tin-based perovskite photovoltaics offer promising optoelectronic properties and a less toxic alternative to lead-based counterparts but suffer from rapid degradation under ambient conditions, primarily due to Sn²⁺ oxidation. We leverage the chemically dynamic nature of halide perovskites to demonstrate a functional operando self-healing effect in unencapsulated Sn-based perovskite solar cells (Sn-PSCs). This is enabled by incorporating thiophene-2-ethylammonium (TEA) halide as an additive in FASnI₃ devices. Remarkably, under continuous ambient operation (30 °C, 60% RH) and one sun simulated illumination, these devices can spontaneously overcome initial performance losses, progressively enhancing their power conversion efficiency (PCE) beyond their initial valu

SUBMITTER: Minguez-Avellan M 

PROVIDER: S-EPMC12848990 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature