A Novel Narrow Band Red-Emitting Phosphor for White Light Emitting Diodes

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Research on down conversion phosphor materials is the key for the development of solid-state lighting (SSL). Especially finding alternative red phosphor for white light emitting diodes (LEDs) based on blue or near ultraviolet (NUV) LEDs is important research task. In this view, we have synthesized a series of Eu(3+)-substituted La(2)W(2-x)Mo(x)O(9) (x = 0-2, in step of 0.3) red phosphor and characterized by X-ray diffraction (XRD) and photoluminescence. XRD results reveal a phase transition from triclinic to cubic structure for x > 0.2. All the compositions show broad charge transfer (CT) band due to CT from oxygen to tungsten/molybdenum and red emission due to Eu(3+) ions. Select compositions show high red emission intensity compared with the commercial red phosphor under NUV/blue ray excitation. Hence, this candidate can be a possible red phosphor for white LEDs.
Publisher
WILEY-BLACKWELL PUBLISHING
Issue Date
2009-07
Language
English
Article Type
Article
Keywords

UV EXCITATION; OXIDES

Citation

INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY, v.6, no.4, pp.453 - 458

ISSN
1546-542X
DOI
10.1111/j.1744-7402.2009.02371.x
URI
http://hdl.handle.net/10203/18204
Appears in Collection
MS-Journal Papers(저널논문)
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