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Regulating the Optical Properties of Cs~3~MnBr~5~ Nanocrystals in Glasses for Narrow-Band Green Emission by Kai Li; Ying Ye; Wenchao Zhang; Yudong Zhang; Chao Liu is a Chemistry article available to read on EtoBox.

What is Regulating the Optical Properties of Cs~3~MnBr~5~ Nanocrystals in Glasses for Narrow-Band Green Emission about?

Environmentally friendly phosphors with narrow-band green luminescence are in great demand for solid-state lighting and backlight display applications. Herein, all inorganic lead-free Cs 3 MnBr 5 nanocrystals (NCs) are prepared in glass with dual-band luminescence and a high photoluminescence (PL) quantum yield of 60.2%. However, due to the short separation and strong coupling interaction between neighboring [ ] MnBr 4 2 units, Cs 3 MnBr 5 NCs undergo energy transfer from a single [ ] MnBr 4 2 unit to coupled [ ] MnBr 4 2 clusters and give green-red dual-band PL. Incorporation of Zn into Cs 3 MnBr 5 NCs therefore enlarges the average separation and reduces the interaction between neighboring [ ] MnBr 4 2 units to inhibit energy transfer from the green-emitting [ ] MnBr 4 2 unit to coupled [ ] MnBr 4 2 clusters, thus changing the dual-band PL into single-band green PL at 524 nm with a full width at half maximum of 47 nm and a maximal PL quantum yield of 50%. Low-temperature PL also demonstrates that partial replacement of Mn 2+ ions by Zn 2+ ions can further confine the exciton in the [ ] MnBr 4 2 unit and suppress the energy transfer. These Cs 3 MnBr 5 NCs-and Zn/Cs 3 MnBr 5 NCs-em

Who reads Regulating the Optical Properties of Cs~3~MnBr~5~ Nanocrystals in Glasses for Narrow-Band Green Emission?

Author

Kai Li; Ying Ye; Wenchao Zhang; Yudong Zhang; Chao Liu

Publisher

American Chemical Society (ACS)

Published

2023

Language

EN

Field

Chemistry (Physical Sciences)