Influence of Structural Polymorphs on Tunable White Light Generation from Orange-Red-Emitting BiPO4:Eu3+ Phosphor by Surface Modification
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Influence of Structural Polymorphs on Tunable White Light
Generation from Orange-Red-Emitting BiPO4:Eu3+ Phosphor by
Surface Modification
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| Creator |
George Muller, J.
Karthikeyan, J. Murugan, P. Lakshminarasimhan, N. |
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| Subject |
Electrochemical Materials Science
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| Description |
We report the surface modification of orange-red-emitting
hexagonal and monoclinic polymorphs of BiPO4:Eu3+ with oleic acid (OA)
for white light generation. The surface-modified hexagonal phase emits
white light under near-UV excitation (350−395 nm) through the mixing of
broad blue emission from OA and orange-red emission from Eu3+, whereas
the same was not observed with the monoclinic phase. The variation in OA
emission upon anchoring over the surface of hexagonal BiPO4:Eu3+ resulted
in white light generation. Such variation in the interaction of OA with
surfaces of BiPO4 polymorphs and surface induced midgap states was
established through first-principles calculations that revealed the strong
interaction of OA with hexagonal phase. The deduced density of states
corroborates the experimental findings on the polymorph-dependent PL
properties of OA-modified hexagonal and monoclinic BiPO4:Eu3+
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| Publisher |
American Chemical Society
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| Date |
2014
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/3084/1/022-2014.pdf
George Muller, J. and Karthikeyan, J. and Murugan, P. and Lakshminarasimhan, N. (2014) Influence of Structural Polymorphs on Tunable White Light Generation from Orange-Red-Emitting BiPO4:Eu3+ Phosphor by Surface Modification. Journal of Physical Chemistry C, 118. pp. 19308-19314. ISSN 1932-7447 |
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| Relation |
http://www.pubs.acs.org/JPCC
http://cecri.csircentral.net/3084/ |
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