Abstract

Subject of study. The paper presents an approach to obtaining nanocomposite polymer structures (films) and their application in luminescent spark sensors with a spectral radiation converter. CsPbBr₃ inorganic perovskite nanocrystals introduced by encapsulation into the polydimethylsiloxane polymer structure act as a spark radiation converter into the visible spectrum region. The aim of this work is to develop an approach to obtaining composite structures based on polydimethylsiloxane polymer and CsPbBr₃ perovskite nanocrystals to protect perovskite nanocrystals from degradation and show the fundamental possibility of adopting the composite materials as radiation converters of the fiber-optic spark sensor. Method. The method of encapsulating nanocrystals in a polymer structure was employed to create the polydimethylsiloxane CsPbBr₃ composite structure. The efficiency of the optical system is calculated with numerical simulation. Main results. The luminescence, absorption, and quantum yield spectra of inorganic perovskites and composite structures based on inorganic CsPbBr₃ perovskite nanocrystals and polydimethylsiloxane are analyzed. The degradation properties of the composite structure were studied for 10 months. The full width at half-maximum characteristics for the luminescence spectra of composite structures based on CsPbBr₃ perovskite nanocrystals and polydimethylsiloxane are calculated. The modeling of the optic sensor system is conducted, the optical efficiency of utilizing the composite structure is calculated, and the fundamental possibility of adopting it for application as radiation converters of optical spark sensors is demonstrated. Practical significance. The studied composite materials based on CsPbBr₃ perovskite nanocrystals and polydimethylsiloxane obtained utilizing the developed technology can be employed as radiation converters in position-sensitive fiber-optic spark sensors, as well as in various other optical and optoelectronic devices.

© 2024 Optica Publishing Group