Manganese-Doped, Lead-Free Double Perovskite Nanocrystals for Bright Orange-Red Emission.

ABSTRACT: Lead-free halide perovskite nanocrystals (NCs) have recently attracted attention due to their nontoxicity and stability as alternatives to lead-based perovskite NCs. Here, we report undoped and manganese-doped all-inorganic, lead-free double perovskite (DP) NCs: Cs₂NaIn _x Bi_1-x Cl₆ (0 < x < 1) and Cs₂NaIn _x Bi_1-x Cl₆:Mn (0 ≤ x ≤ 1) NCs. Undoped NCs exhibit blue emission. Through doping Mn²⁺ ions into Cs₂NaIn _x Bi_1-x Cl₆ NCs, we can avoid self-trapped exciton emission and realize bright orange red emission of Mn²⁺ dopants with the highest photoluminescence quantum efficiency of 44.6%.

SUBMITTER: Han P 

PROVIDER: S-EPMC7181313 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature