Enhancement of perovskite spontaneous emission by phase change materials

Abstract

Abstract Controlling the spontaneous emission intensity of perovskites is one of the main unsolved problems of perovskite photonics. To date, to solve this problem, chemical methods have been used to passivate defects in the material and thereby to increase the radiation intensity. However, this method does not allow reversible control of the spontaneous emission intensity of perovskites. Here, we theoretically demonstrate the reversibly controlling the spontaneous emission of perovskites through the use of phase change materials (PCMs). We show changes in the Purcell factor by more than 50% with a change in the PCM phase in the all-visible wavelength range. We also conduct a comparative analysis of the two most popular PCMs, namely Ge–Sb–Te and SbSe. We anticipate that our theoretical results will serve as a foundation for future technological solutions for the development of tunable radiation sources.