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Interfacial alloying between lead halide perovskite crystals and hybrid glasses

journal contribution
posted on 2024-11-03, 13:24 authored by Xuemei Li, Wengang Huang, Andraz Krajnc, Mehri GhasemiMehri Ghasemi, Xiaoming WenXiaoming Wen
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 CsPbI3 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 CsPbI3. 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.

History

Journal

Nature Communications

Volume

14

Number

7612

Issue

1

Start page

1

End page

12

Total pages

12

Publisher

Nature Publishing Group

Place published

United Kingdom

Language

English

Copyright

© The Author(s) 2023. This article is licensed under a Creative Commons Attribution 4.0 International License.

Former Identifier

2006127648

Esploro creation date

2024-01-13

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