Flattening Grain-Boundary Grooves for Perovskite Solar Cells with High Optomechanical Reliability.

Autor: Hao M; Department of Physics, Hong Kong Baptist University, Kowloon, Hong Kong SAR, P. R. China., Duan T; Department of Physics, Hong Kong Baptist University, Kowloon, Hong Kong SAR, P. R. China., Ma Z; Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, P. R. China., Ju MG; Department of Physics, Southeast University, Nanjing, Jiangsu, 211189, P. R. China., Bennett JA; Department of Chemistry, Yale University, New Haven, CT, 06520, USA., Liu T; Department of Physics, Hong Kong Baptist University, Kowloon, Hong Kong SAR, P. R. China., Guo P; Department of Chemical and Environmental Engineering, Yale University, New Haven, CT, 06520, USA., Zhou Y; Department of Physics, Hong Kong Baptist University, Kowloon, Hong Kong SAR, P. R. China.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2023 Apr; Vol. 35 (15), pp. e2211155. Date of Electronic Publication: 2023 Mar 04.
DOI: 10.1002/adma.202211155
Abstrakt: Optomechanical 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 layer. In this work, grain-boundary grooves, a rarely discussed film microstructural characteristic, are found to impart significant effects on the optomechanical reliability of perovskite-substrate heterointerfaces and thus PSC performance. By pre-burying iso-butylammonium chloride additive in the electron-transport layer (ETL), GB grooves (GBGs) are flattened and an optomechanically reliable perovskite heterointerface that resists photothermal fatigue is created. The improved mechanical integrity of the ETL-perovskite heterointerfaces also benefits the charge transport and chemical stability by facilitating carrier injection and reducing moisture or solvent trapping, respectively. Accordingly, high-performance PSCs 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 are achieved.
(© 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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