Improving Stability of Triple‐Cation Perovskite Solar Cells under High‐Temperature Operation

Abstract

Metal halide perovskite photovoltaic performance required for commercial technology encompasses both efficiency and stability. Advances in both these parameters have recently been reported; however, these strategies are often difficult to directly compare due to differences in perovskite composition, device architecture, fabrication methods, and accelerated stressors applied in stability tests. In particular, it is found that there is a distinct lack of elevated temperature, operational (light and bias) stability data. Furthermore, significant testing is required to understand the interactions when combinations are used (e.g., additives used with posttreatments). Herein, individual and combined additive, posttreatment, and contact layer strategies from recent literature reports under standardized operational stability tests of p–i–n CsMAFA perovskites at 70 °C are evaluated. Through analysis of over 1000 devices, it is concluded that the hole‐transport layer (HTL) is the most significant component impacting elevated temperature operational stability. This analysis motivates future development of high‐performance HTLs.

Measuring metal halide perovskite single cell degradation consistent with module-based conditions

“…1a, comprising 486 individual substrates were aggregated and examined. A subset of the best performing variations of this set was reported in more detail by Louks et al 20 The materials and treatments used in this work are summarized in Table S1 †…”

“…1a, comprising 486 individual substrates were aggregated and examined. A subset of the best performing variations of this set was reported in more detail by Louks et al 20 The materials and treatments used in this work are summarized in Table S1. † The stability of these samples was evaluated in our Stability Parameter Analyzer (SPA) system in a modied ISOS-L-2I test.…”