In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 10, No. 43 ( 2022), p. 23204-23211
Abstract:
Reducing the toxicity of hybrid halide perovskites is critical in the path toward perovskite photovoltaic commercialization. In this regard, Sn-based halide perovskite compounds, especially inorganic CsSnI 3, are emerging as promising alternatives. However, the instability of Sn-based perovskites originated from Sn 2+ oxidation remains a serious problem that needs to be addressed. Herein, we propose a facile yet effective galvanic displacement reaction (GDR) method to solve this issue. Using zinc metal powder as an example, the Sn 4+ species can be spontaneously and completely reduced via the GDR in precursor solutions in a short time. Meanwhile, this procedure introduces a certain number of external divalent Zn 2+ metal ions into the inorganic CsSnI 3 perovskite lattice. The introduced Zn 2+ is found to weaken the adsorption of water and oxygen molecules on the CsSnI 3 crystalline surface, therefore enhancing the ambient stability of the resulting perovskite films. A power conversion efficiency of 8.27% was achieved for inorganic CsSnI 3 mesoporous solar cells using a fully printable TiO 2 /Al 2 O 3 /NiO/carbon framework. To the best of our knowledge, this is the highest efficiency for fully inorganic CsSnI 3 -based mesoporous devices reported so far. Moreover, the devices without encapsulation maintained 86.3% of the initial efficiency after being stored in ambient air for 216 hours.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702232-8
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