Title

White light emission from surface-oxidized manganese-doped ZnS nanorods

Authors

Authors

S. Kar;S. Biswas

Comments

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Abbreviated Journal Title

J. Phys. Chem. C

Keywords

SEMICONDUCTOR NANOWIRES; OPTICAL-PROPERTIES; EMITTING DEVICES; NANOCRYSTALS; PERFORMANCE; DIODES; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, ; Multidisciplinary

Abstract

Mn-doped ZnS nanorods synthesized on zinc foils by a solvothermal approach exhibited white light emission upon excitation in the UV range (300-330 nm). X-ray diffraction studies coupled with energy-dispersive X-ray analysis and X-ray photoelectron spectroscopy indicated the presence of a thin oxide layer on the Mn-doped ZnS nanorods. The diameters and lengths of the nanorods varied within the ranges 5-12 and 50-100 nm, respectively. The emitted white light was found to be the result of blue, green, and orange emission bands. The blue bands at similar to 400 and 459 nm were attributed to sulfur vacancies and surface states, respectively. The green band at similar to 511 nm was associated with the singly ionized oxygen vacancy of the ZnO shell layer. The orange emission originated from the T-4(1)-(6)A(1) transition of the Mn2+ ions. Thus, the emissions from the Mn-doped ZnS core and the outer ZnO shell combine together to produce the white light.

Journal Title

Journal of Physical Chemistry C

Volume

112

Issue/Number

30

Publication Date

1-1-2008

Document Type

Article

Language

English

First Page

11144

Last Page

11149

WOS Identifier

WOS:000257927100013

ISSN

1932-7447

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