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Temperature Dependence of Up-Conversion Luminescence and Photoluminescence of Mn2+ in ZnS:Mn2+ Nanoparticles

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Abstract:

The photoluminescence (excited at both 300 nm and 383.5 nm) and up-conversion luminescence (excited at 767 nm) of the Mn2+ 4T16A1 transition in both bulk and ZnS:Mn2+ nanoparticles have been measured as a function of temperature. The Mn2+ emission spectra shift monotonically to longer wavelengths at lower temperatures, whereas the intensity change of the luminescence is more complex. The complicated temperature behavior is explained by considering the processes of nonradiation relaxation via phonon coupling, exciton thermal dissociation (binding energy), energy transfer, carrier trapping, and the temperature change of the absorption spectra. The fact that the temperature dependence of the 767 nm excited up-conversion luminescence is the same as the 383.5 nm excited photoluminescence in both bulk and nanoparticles supports the conclusion that the up-conversion luminescence is due to two-photon absorption.

Keywords: DOPED SEMICONDUCTOR; ENERGY TRANSFER; LUMINESCENCE; NANOPARTICLE; TEMPERATURE DEPENDENCE; TWO-PHOTON ABSORPTION; UP-CONVERSION; ZNS:MN2+

Document Type: Research Article

DOI: https://doi.org/10.1166/jnn.2001.049

Affiliations: 1: Pacific Northwest National Laboratory, P. O. Box 999, Richland, Washington 99352, USA 2: Nomadics, Inc., 1024 South Innovation Way, Stillwater, Oklahoma 74074, USA 3: Department of Chemistry, University of California, Santa Cruz, California 95064, USA

Publication date: 2001-09-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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