Integrated manufacturing of REciclable multi-material COmposites for the TRANSport sector
Flattening Grain?Boundary Grooves for Perovskite Solar Cells with High Opto?Mechanical Reliability
Opto?mechanical reliability has emerged as an important criterion for evaluating the performance and commercialization potential of perovskite solar cells (PSCs) due to the mechanical?property mismatch of metal halide perovskites with other device layers. In this work, grain?boundary groove, a rarely discussed film microstructural characteristics, is found to impart significant effects on the opto?mechanical reliability of perovskite?substrate heterointerfaces and thus PSC performance. By pre?burying iso?butylammonium chloride additive in the electron?transport layer, we flattened GB grooves and created an opto?mechanically reliable perovskite heterointerface that resists the photothermal fatigue. The improved mechanical integrity of ETL?perovskite heterointerfaces also benefits the charge transport and chemical stability by facilitating the carrier injection and reducing the moisture or solvent trapping, respectively. Accordingly, we achieved high?performance perovskite solar cells which exhibit efficiency retentions of 94.8% under 440 h damp heat test (85% RH and 85 °C), and 93.0% under 2000 h continuous light soaking.This article is protected by copyright. All rights reserved
» Publication Date: 23/01/2023
This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 768737
