Optical properties of Mn-doped ZnS semiconductor nanoclusters synthesized by a hydrothermal process

Tran, T.Q.H., Ngo, D.-T., McVitie, S. , Nguyen, H.N., Le, V.V., Ta, D.C. and Nguyen, N.L. (2011) Optical properties of Mn-doped ZnS semiconductor nanoclusters synthesized by a hydrothermal process. Optical Materials, 33(3), pp. 308-314. (doi:10.1016/j.optmat.2010.09.008)

Full text not currently available from Enlighten.

Publisher's URL: http://dx.doi.org/10.1016/j.optmat.2010.09.008

Abstract

Undoped and Mn-doped ZnS nanoclusters have been synthesized by a hydrothermal approach. Various samples of the ZnS:Mn with 0.5, 1, 3, 10 and 20 at.% Mn dopant have been prepared and characterized using X-ray diffraction, energy-dispersive analysis of X-ray, high resolution electron microscopy, UV-vis diffusion reflection, photoluminescence (PL) and photoluminescence excitation (PLE) measurements. All the prepared, ZnS nanoclusters possess cubic sphalerite crystal structure with lattice constant a = 5.408 ± 0.011 Á. The PL spectra of Mn-doped ZnS nanoclusters at room temperature exhibit both the 495 nm blue defect-related emission and the 587 nm orange Mn2+ emission. Furthermore, the blue emission is dominant at low temperatures: meanwhile the orange emission is dominant at room temperature. The Mn2+ ion-related PL can be excited both at energies near the band-edge of ZnS host (the UV region) and at energies corresponding to the Mn2+ ion own excited states (the visible region). An energy schema for the Mn-doped ZnS nanoclusters is proposed to interpret the photoluminescence behaviour.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McVitie, Professor Stephen
Authors: Tran, T.Q.H., Ngo, D.-T., McVitie, S., Nguyen, H.N., Le, V.V., Ta, D.C., and Nguyen, N.L.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Optical Materials
ISSN:0925-3467
ISSN (Online):1873-1252

University Staff: Request a correction | Enlighten Editors: Update this record