1. Luminescence Enhancement of CsMnBr 3 Nanocrystals through Heterometallic Doping.
- Author
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Li Y, Wang C, Xu G, Luo G, and Deng Z
- Abstract
The absorption and photoluminescence (PL) of CsMnBr
3 with Mn(II) in octahedral crystal fields are extremely weak due to a d-d forbidden transition. Herein, we introduce a facile and general synthetic procedure that can prepare undoped and heterometallic doped CsMnBr3 NCs at room temperature. Importantly, both PL and absorption of CsMnBr3 NCs were significantly improved after doping a small amount of Pb2+ (4.9%). The absolute photoluminescence quantum yield (PL QY) of Pb-doped CsMnBr3 NCs is up to 41.5%, 11-fold higher than undoped CsMnBr3 NCs (3.7%). The PL enhancement is attributed to the synergistic effects between [MnBr6 ]4- units and [PbBr6 ]4- units. Furthermore, we verified the similar synergistic effects between [MnBr6 ]4- units and [SbBr6 ]4- units in Sb-doped CsMnBr3 NCs. Our results highlight the potential of tailoring luminescence properties of manganese halides through heterometallic doping.- Published
- 2023
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