https://doi.org/10.1140/epjp/s13360-023-04571-4
Regular Article
One step low pressure CVD preparation of deep-blue emissive Cs3Cu2I5 perovskite film
School of Physical Science and Technology, Southwest Jiaotong University, 610031, Chengdu, Sichuan, China
a
oukai@swjtu.edu.cn
e
Ydx@swjtu.edu.cn
Received:
8
June
2023
Accepted:
8
October
2023
Published online:
24
October
2023
Lead-free metal halide perovskites have gained significant attention due to their environmental friendliness and excellent optoelectronic properties. All-inorganic Cu-based perovskites has been recognized as a promising candidate due to lead-free, fewer defects and a large Stokes shift. However, the luminescent properties of Cu-based perovskites are not as advanced as those of lead-based perovskites. It is valuable to find new ways to obtain high quality copper-based perovskite. Herein, Cs3Cu2I5 film is prepared by one-step low pressure chemical vapor deposition method for the first time, and the effects of different growth pressures on Cs3Cu2I5 were studied. The obtained Cs3Cu2I5 film shows a bright deep-blue emission peaked at about 442 nm. A large Stokes shift of about 150 nm indicates that the photoluminescence behavior cannot belong to the direct band emission mechanism. Based on temperature-dependent photoluminescence spectra, it is concluded that the broadband blue emission originates from self-trapped excitons. Overall, this work presents a novel and efficient strategy for preparing high-quality copper-based perovskite films.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
