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ISSN: 1023-5086

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ISSN: 1023-5086

Scientific and technical

Opticheskii Zhurnal

A full-text English translation of the journal is published by Optica Publishing Group under the title “Journal of Optical Technology”

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DOI: 10.17586/1023-5086-2026-93-06-69-78

УДК: 620.197.7:621.315.592, 535.34

The effect of polyvinylpyrrolidone and acids on the optical characteristics of CsPbI3 perovskite and its phase stability

Tarasov A.S., Isaev Y.E., Degterev A.Е., Degtereva M.М., Pavlova M.D., Khorshev N.A., Levin Y., Mikhailov I.I., Lamkin I.A., Tarasov S.А.
For Russian citation (Opticheskii Zhurnal):

Тарасов А.С., Исаев Ю.Е., Дегтерев А.Э., Дегтерева М.М., Павлова М.Д., Хоршев Н.А., Левин Е., Михайлов И.И., Ламкин И.А., Тарасов С.А. Влияние поливинилпирролидона и кислот на оптические характеристики перовскита CsPbI3 и его фазовую стабильность // Оптический журнал. 2026. Т. 93. № 6. С. 69–78. http://doi.org/10.17586/1023-5086-2026-93-06-69-78

Tarasov A.S., Isaev Yu.E., Degterev A.E., Degtereva M.M., Pavlova M.D., Khorshev N.A., Levin E., Mikhailov I.I., Lamkin I.A., Tarasov S.A. The effect of polyvinylpyrrolidone and acids on the optical characteristics of CsPbI3 perovskite and its phase stability [in Russian] // Opticheskii Zhurnal. 2026. V. 93. № 6. P. 69–78. http://doi.org/10.17586/1023-5086-2026-93-06-69-78

For citation (Journal of Optical Technology):
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Abstract:

Scope of research. Phase stabilization of CsPbI3 inorganic perovskite thin films in order to optimize their functional characteristics for use in next-generation optoelectronic devices. The purpose of the work. Development of a processing method for the synthesis of CsPbI3 thin films with controlled structural parameters by introducing stabilizing additives (polyvinylpyrrolidone, hydroiodic, formic and succinic acids) and study of their effect on the kinetics of phase transformations and long-term stability of the perovskite phase. Method. Phase stabilization was achieved by adding polyvinylpyrrolidone and acids to a liquid solution of perovskite precursors. The stability of the perovskite phase was estimated based on the position of the absorption edge and by analyzing the changes in optical density. Main results. The introduction of stabilizing additives allowed to extend the lifetime of the CsPbI3 perovskite phase multifold. The stability period of the perovskite phase exceeded 1000 hours. The most effective stabilizing additives and their concentrations were determined. A synergistic effect from the addition of polymer and acids was revealed, which allowed to increase the stability of the perovskite phase by reducing the density of defects. Practical significance. The developed approach allows to obtain stable photoactive layers of CsPbI3, which can be used in the fabrication of optoelectronic devices, such as perovskite solar cells including tandem structures based on silicon and other compounds, hybrid LEDs and visible range photodetectors.

Keywords:

metal halide perovskite, thin films, inorganic perovskite, phase stabilization, degradation

Acknowledgements:

the work was supported by Project № FSEE-2025-0013.

OCIS codes: 310.6860, 160.4670

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