Journal Article

PUBDB-2024-01295

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Interfacial alloying between lead halide perovskite crystals and hybrid glasses

Li, X. ; Huang, W. ; Krajnc, A. ; Yang, Y.Extern* ; Shukla, A. ; Lee, J. ; Ghasemi, M. ; Martens, I. ; Chan, B. ; Appadoo, D. ; Chen, P. ; Wen, X. ; Steele, J. A. ; Hackbarth, H. G.Extern* ; Sun, Q. ; Mali, G.Extern* ; Lin, R. ; Bedford, N. M.Extern* ; Chen, V. ; Cheetham, A. K.Extern* ; Tizei, L. H. G. ; Collins, S. M. ; Wang, L. ; Hou, J. (Corresponding author)

2023
Nature Publishing Group UK [London]

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Please use a persistent id in citations: doi:10.1038/s41467-023-43247-6  doi:10.3204/PUBDB-2024-01295

Abstract: The stellar optoelectronic properties of metal halide perovskites provide enormous promise for next-generation optical devices with excellent conversion efficiencies and lower manufacturing costs. However, there is a long-standing ambiguity as to whether the perovskite surface/interface (e.g. structure, charge transfer or source of off-target recombination) or bulk properties are the more determining factor in device performance. Here we fabricate an array of CsPbI$_3$ crystal and hybrid glass composites by sintering and globally visualise the property-performance landscape. Our findings reveal that the interface is the primary determinant of the crystal phases, optoelectronic quality, and stability of CsPbI$_3$. In particular, the presence of a diffusion “alloying” layer is discovered to be critical for passivating surface traps, and beneficially altering the energy landscape of crystal phases. However, high-temperature sintering results in the promotion of a non-stoichiometric perovskite and excess traps at the interface, despite the short-range structure of halide is retained within the alloying layer. By shedding light on functional hetero-interfaces, our research offers the key factors for engineering high-performance perovskite devices.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)

Experiment(s):

1. PETRA Beamline P21.1 (PETRA III)

Appears in the scientific report 2023

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