Abstract
Mn(2+) ions doped CsPbCl(3) perovskite nanocrystals (NCs) exhibit superiority of spin-associated optical and electrical properties. However, precisely controlling the doping concentration, doping location, and the mono-distribution of Mn(2+) ions in the large-micro-size CsPbCl(3) perovskite host is a formidable challenge. Here, the micro size CsPbCl(3) perovskite crystals (MCs) are reported with uniform Mn(2+) ions doping by self-assembly of Mn(2+) ions doped CsPbCl(3) perovskite NCs. The electron-phonon coupling strength is enhanced in the perovskite self-assembled CsPbCl(3) MCs, which remarkably accelerates the PL decay of Mn(2+) ions in room temperature. Furthermore, the phonon-involved PL emission splits to two peaks at low temperature of 80 K, due to the phonon emission and absorption-induced energy exchange for exciton recombination in Mn(2+) ions. These findings not only demonstrate a novel material system but also introduce a new theoretical framework for phonon-modulated PL manipulation in Mn(2+)-doped perovskite materials.