Highly Efficient Blue-Emitting CsPbBr₃ Perovskite Nanocrystals through Neodymium Doping.

ABSTRACT: Colloidal CsPbX₃ (X = Br, Cl, and I) perovskite nanocrystals exhibit tunable bandgaps over the entire visible spectrum and high photoluminescence quantum yields in the green and red regions. However, the lack of highly efficient blue-emitting perovskite nanocrystals limits their development for optoelectronic applications. Herein, neodymium (III) (Nd³⁺) doped CsPbBr₃ nanocrystals are prepared through the ligand-assisted reprecipitation method at room temperature with tunable photoemission from green to deep blue. A blue-emitting nanocrystal with a central wavelength at 459 nm, an exceptionally high photoluminescence quantum yield of 90%, and a spectral width of 19 nm is achieved. First principles calculations reveal that the increase in photoluminescence qu

SUBMITTER: Xie Y 

PROVIDER: S-EPMC7578857 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature