Utilization of LiSrPO4:Eu phosphor and Cu-In-S quantum dot for fabrication of high color rendering white light-emitting diode

Title
Utilization of LiSrPO4:Eu phosphor and Cu-In-S quantum dot for fabrication of high color rendering white light-emitting diode
Authors
송우석김종훈이정훈이혜승장호성양희선
Keywords
phosphor; Cd-free quantum dots; white LEDs; color rendering; Luminescence; LiSrPO4:Eu phosphor; Cu-In-S/ZnS quantum dot
Issue Date
2013-02
Publisher
Materials letters
Citation
VOL 92, 325-329
Abstract
We report on the utilization of a novel combination of LiSrPO4:Eu phosphor plus Cu–In–S (CIS)/ZnS core/shell quantum dot (QD) as down-converter for the fabrication of a high color rendering white light-emittng diode (LED). Blue-emitting (452 nm) LiSrPO4:Eu phosphor and yellow-emitting (557 nm) CIS/ZnS QD are synthesized by conventional solid-state reaction and hot colloidal methods, respectively, and thier luminescent properties are characterizied. Taking advantage of the excellent excitation efficiencies of both phosphor and QD at near-UV region, they are incorporated into a near-UV-emitting LED chip with a scheme of QD-on-phosphor. Elelctroluminescent properties of the resulting white LED are described, and also compared to those of a blue LED-pumped, CIS/ZnS QD-based white LED with a limited color rendering property.
URI
http://pubs.kist.re.kr/handle/201004/46170
ISSN
0167577X
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KIST Publication > Article
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