Symmetry and electronic states of Mn2+ in ZnS nanowires with mixed hexagonal and cubic stacking

Li Chen; Kirilenko, Demid; Stesmans, Andre; Nguyen, Xuan Sang; Binnemans, Koen; Goderis, Bart; Vanacken, Johan; Lebedev, Oleg; Van Tendeloo, Gustaaf; Moshchalkov, Victor V.
July 2010
Applied Physics Letters;7/26/2010, Vol. 97 Issue 4, p041918
Academic Journal
Electron spin resonance and electronic spectroscopy techniques were used to study the symmetry and electronic structure of Mn2+ dopants in solvothermally synthesized ZnS nanowires. The average diameter of ∼5 nm leads to the observable quantum confinement effects in the photoluminescence excitation spectra. The results clearly demonstrate the three symmetry locations of Mn2+ incorporation. Together with the inferred Mn2+ center densities, these data indicate a much higher efficiency of Mn2+ substitution in the nanowire sample with about two times larger diameter.


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