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- W2910724204 abstract "Mn2+-doped ZnSe nanocrystals (Mn:ZnSe d-dots) with high optical quality—high dopant emission quantum yield with monoexponential dopant-emission decay dynamics—enable systematic and quantitative studies of temperature- and Mn2+ concentration-dependent optical properties of the dopant emission, especially its relationship with magnetic coupling. While temperature-dependent steady-state and transient dopant emission of d-dots with dilute Mn2+ concentrations originated from isolated Mn2+ ions, and can be quantitatively treated as a result of exciton–phonon coupling of isolated paramagnetic emission centers. Dopant emission of d-dots with high Mn2+ concentrations (up to 50% of Zn2+ ions being replaced by Mn2+ ions in the core nanocrystals) are found solely related to magnetically coupled Mn2+ emission. Magnetic coupling effects on steady-state dopant emission of d-dots with high Mn2+ concentrations are much stronger than those observed for doped bulk semiconductors, which is found to follow a strong and universe shell-thickness dependence for the epitaxial ZnSe and/or ZnS shells of the d-dots. By exciting the magnetically coupled Mn2+ ions directly, dopant-emission of d-dots with high Mn2+ concentrations exhibit monoexponential decay dynamics. In addition to this emission channel, a minor channel with slightly longer decay lifetime appears when the host nanocrystals with high Mn2+ concentrations are excited, which is barely visible at room temperature and increases its fraction by decreasing temperature." @default.
- W2910724204 created "2019-01-25" @default.
- W2910724204 creator A5012778666 @default.
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- W2910724204 creator A5071994713 @default.
- W2910724204 creator A5080850908 @default.
- W2910724204 date "2019-01-16" @default.
- W2910724204 modified "2023-10-05" @default.
- W2910724204 title "Temperature- and Mn<sup>2+</sup> Concentration-Dependent Emission Properties of Mn<sup>2+</sup>-Doped ZnSe Nanocrystals" @default.
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