High-speed space optical communication based on metal halide perovskite single crystals

Abstract

In recent years, metal halide single crystals (SCs) have attracted increasing attention because of their excellent optical and electrical properties. In this paper, high-quality Cs₄PbBr₆ SCs were synthesized using a simple HBr-assisted method while possessing outstanding optical properties, including high stability, efficient photoluminescence, and quick radiative recombination rate. The SCs were successfully applied in visible light communication, demonstrating excellent performance. The transmission rate of Cs₄PbBr₆ SCs can reach up to 50 Mb s⁻¹ at only −24 dBm emission intensity to transmit the signal. Notably, the SCs demonstrated the capability to emit fluorescence over a wide range of angles, while ensuring reliable signal transmission. These findings present Cs₄PbBr₆ SCs as a promising material for advancing visible light communication.