Abstract
Energy transfer dynamics in Mn2+-doped ZnSe nanoparticles have been studied by monitoring the photoluminescence using time-integrated and time-resolved spectroscopic techniques. Upon Mn2+ doping, static photoluminescence (PL) spectra show that the bandedge excitonic state is quenched and the characteristic Mn2+ emission appears at 584 nm. Picosecond PL kinetics and femtosecond transient absorption studies have both found that the Mn2+ doping substantially shortens the average lifetimes of the bandedge excitonic state as well as shallow trap states. The energy transfer from ZnSe to Mn2+ likely follows two mechanisms, one mediated through trap states and another without.
Publication types
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Evaluation Study
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, Non-P.H.S.
MeSH terms
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Computer Simulation
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Crystallization / methods
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Energy Transfer
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Kinetics
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Light
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Luminescence*
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Manganese / analysis
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Manganese / chemistry*
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Manganese / radiation effects
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Materials Testing
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Models, Chemical*
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Nanostructures / analysis
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Nanostructures / chemistry*
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Photochemistry / methods*
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Selenium Compounds / analysis
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Selenium Compounds / chemistry*
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Selenium Compounds / radiation effects
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Semiconductors*
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Solutions
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Zinc Compounds / analysis
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Zinc Compounds / chemistry*
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Zinc Compounds / radiation effects
Substances
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Selenium Compounds
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Solutions
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Zinc Compounds
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Manganese
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zinc selenide