Room-Temperature Nickel Doped Cesium Lead Bromide Quantum Dots for Enhanced Luminescence Properties and Phase Stability
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Perovskite quantum dots (PQDs) are easy to synthesize and have excellent luminescent properties, attracting attention as next-generation fluorescent materials. However, since PQDs are composed of ionic bonds, their stability in the surrounding environment is low and phase transitions easily occur, so their commercial applications are limited. Accordingly, it has been reported that optical properties and phase stability will be improved in CsPbBr3 QDs through nickel ion doping. However, in most reported studies, doping was performed in a high temperature environment using the hot-injection method, which can have a negative impact on heat-sensitive perovskite materials. This study suggests that nickel ion doped CsPbBr3 QDs are easily synthesized in a stable environment at room temperature through the split-ligand mediated reprecipitation (S-LMRP) method. We propose this as a facile method to improve the luminescence and stability of PQDs.