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

    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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