Theory of Luminescent Emission in Nanocrystal ZnS:Mn with an Extra Electron

Details Theory of Luminescent Emission in Nanocrystal ZnS:Mn with an Extra Electron Theory of Luminescent Emission in Nanocrystal ZnS:Mn with an Extra Electron

2002-02-20

arxiv.org/abs/cond-mat/0202358v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

15 pages, 2 Figs No change in Figs

Scientific paper

We consider the effect of an extra electron injected into a doped quantum dot $ZnS:Mn^{2+}$. The Coulomb interaction and the exchange interaction between the extra electron and the states of the Mn ion will mix the wavefunctions, split the impurity energy levels, break the previous selection rules and change the transition probabilities. Using this model of an extra electron in the doped quantum dot, we calculated the energy and the wavefunctions, the luminescence probability and the transition lifetime and compare with the experiments. Our calculation shows that two orders of magnitudes of lifetime shortening can occur in the transition $^4T_1-^6A_1$ when an extra electron is present.

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