Tuning Exciton-Mn²⁺ Energy Transfer in Mixed Halide Perovskite Nanocrystals.

ABSTRACT: Doping nanocrystals (NCs) with luminescent activators provides additional color tunability for these highly efficient luminescent materials. In CsPbCl₃ perovskite NCs the exciton-to-activator energy transfer (ET) has been observed to be less efficient than in II-VI semiconductor NCs. Here we investigate the evolution of the exciton-to-Mn²⁺ ET efficiency as a function of composition (Br/Cl ratio) and temperature in CsPbCl_3-x Br _x :Mn²⁺ NCs. The results show a strong dependence of the transfer efficiency on Br^- content. An initial fast increase in the relative Mn²⁺ emission intensity with increasing Br^- content is followed by a decrease for higher Br^- contents. The results are exp

SUBMITTER: Xu K 

PROVIDER: S-EPMC6156089 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature