EFFECT OF LIQUID NITROGEN TREATMENT ON LEAD-FREE (CH3NH3)3BI2I9 PEROVSKITES FILMS

1 SOKOLOVA Anastasiia
Co-authors:
1 CHEREVKOV Sergei 1 SKURLOV Ivan 1 LITVIN Aleksandr 1,2 USHAKOVA Elena 1 FEDOROV Anatoly 1 BARANOV Alexander
Institutions:
1 ITMO University, Center of Information Optical Technologies, Saint Petersburg, Russia, avsokolova@itmo.ru
2 City University of Hong Kong, Department of Materials Science and Engineering, and Center for Functional Photonics (CFP), Hong Kong S.A.R.
Conference:
11th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 16th - 18th 2019
Proceedings:
Proceedings 11th International Conference on Nanomaterials - Research & Application
Pages:
653-656
ISBN:
978-80-87294-95-6
ISSN:
2694-930X
Published:
1st April 2020
Proceedings of the conference have been sent to Web of Science and Scopus for evaluation and potential indexing.
Metrics:
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Abstract

Metal and organometal halide perovskites, an emerging class of direct bandgap semiconductors, have attracted great attention lately. Lead halide perovskites were recognized as promising candidates for future lighting applications, due to their high quantum yield, narrow full width at half maximum (FWHM), and wide color gamut. Nonetheless, the toxicity of lead induces new approaches such as obtaining lead-free perovskites and further investigation of their stability and optoelectronic properties.In this work is presented a study of lead-free perovskites (CH3NH3)3Bi2I9 film formation for a further application in optoelectronic devices. The experimental part consists of the formation (CH3NH3)3Bi2I9 films and a treatment part. First part has been performed with a quite popular spin-coating approach that provides accessibility and simplicity of the sample’s preparation. Secondly, a liquid nitrogen treatment has been carried out, afterward was investigated the effect of this treatment on the lead-free perovskites films.

Keywords: Perovskite, films, lead-free, emission, stability
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