Rapid Room Temperature Entropy-Stabilized Synthesis Enabling Super-Stable Metal Halide Perovskite Semiconductor Colloidal Nanocrystals

Abstract

Although high-entropy materials have garnered extensive attention due to their substantially enhanced performance, their formation generally demands prolonged high-temperature synthetic processes. Moreover, research on entropy-stabilized halide perovskite (ESHP) semiconductor colloidal nanocrystals (NCs) is scarce. Herein, a highly efficient and rapid room temperature (RT) entropy-stabilized approach in air is proposed, involving the concurrent incorporation of multi-metal cations for the synthesis of high-quality all-inorganic ESHP NCs with near-unity quantum yield and excellent colloidal stability. Remarkably, even after 8 months of aging in air, the ESHP NCs exhibited superior emission characteristics with a single-exponential decay and maintained the initial NC monodispersity. Density functional theory calculations further demonstrated that the outstanding performance of ESHP NCs originated from the diminished crystal defects and a more robust octahedral structure. Significantly, this RT entropy-driven synthesis can be extended to metal halide semiconductor NCs with diverse composition systems. The findings inspire new perspectives for entropy-stabilized, high-performance metal halide perovskite NCs toward versatile applications.