Dynamics of Light Emission in CdMnS Nanoparticles

M. Godlewski a,b, S. Yatsunenkoa, K. Drozdowicz-Tomsiac, E.M. Goldysc, M.R. Phillipsd, P.J. Klare and W. Heimbrodte aInstitute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland bDept. of Mathematics and Natural Sciences College of Science, Cardinal S. Wyszyński University, Warsaw, Poland cDiv. of Information and Communication Sciences, Macquarie University, Sydney, Australia dMicrostructural Analysis Unit, UTS, Sydney, Australia eDept. of Physics and Materials Sciences Center, Philipps-University of Marburg, Renthof 5, 35032 Marburg, Germany

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Received: 4 06 2005;

We demonstrate coexistence of slow and fast components of photoluminescence decay of the Mn2+ intra-shell emission in nanoparticles of CdMnS. We explain the observed decrease in PL lifetime of the Mn2+ intra-shell transition by high efficiency of spin dependent magnetic interactions between localized spins of Mn2+ ions and free carriers. This mechanism is enhanced in nanostructures, but it is also present in bulk samples.

DOI: 10.12693/APhysPolA.108.681 PACS numbers:81.07.Wx, 78.55.Et, 78.47.+p, 71.55.Gs, 76.30.Fc, 76.70.Hb