Abstract
Novel whitish-blue phosphors based on a phosphate host matrix, γ-KCaPO4: Eu2+, were prepared by a conventional solid-state reaction method using slightly phosphorus deficient conditions and their photoluminescence properties were investigated. The concentration quenching process, temperature dependence of the luminescence and decay curve were also investigated. The γ-KCaPO4: Eu2+ phosphor was efficiently excited by UV-Visible light at wavelengths of 200-450 nm and exhibited a bright whitish-blue emission with a maximum peak wavelength of 473 nm. All of these characteristics suggest that the γ-KCaPO4: Eu2+ phosphors combined with red phosphors could be applicable to near UV-based white LEDs, i.e., only two kinds of phosphor powders are needed for the formation of white light.
| Original language | English |
|---|---|
| Pages (from-to) | 1036-1040 |
| Number of pages | 5 |
| Journal | Optical Materials |
| Volume | 33 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2011 Jan 1 |
| Externally published | Yes |
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Keywords
- Concentration quenching
- Phosphate phosphor
- Photoluminescence
- White LEDs
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Computer Science(all)
- Atomic and Molecular Physics, and Optics
- Spectroscopy
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Electrical and Electronic Engineering
Cite this
Preparation and photoluminescence properties of γ-KCaPO4 : Eu2+ phosphors for near UV-based white LEDs. / Yim, Dong Kyun; Cho, In Sun; Lee, Chan Woo; Noh, Jun Hong; Roh, Hee Suk; Hong, Kug Sun.
In: Optical Materials, Vol. 33, No. 7, 01.01.2011, p. 1036-1040.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Preparation and photoluminescence properties of γ-KCaPO4
T2 - Eu2+ phosphors for near UV-based white LEDs
AU - Yim, Dong Kyun
AU - Cho, In Sun
AU - Lee, Chan Woo
AU - Noh, Jun Hong
AU - Roh, Hee Suk
AU - Hong, Kug Sun
PY - 2011/1/1
Y1 - 2011/1/1
N2 - Novel whitish-blue phosphors based on a phosphate host matrix, γ-KCaPO4: Eu2+, were prepared by a conventional solid-state reaction method using slightly phosphorus deficient conditions and their photoluminescence properties were investigated. The concentration quenching process, temperature dependence of the luminescence and decay curve were also investigated. The γ-KCaPO4: Eu2+ phosphor was efficiently excited by UV-Visible light at wavelengths of 200-450 nm and exhibited a bright whitish-blue emission with a maximum peak wavelength of 473 nm. All of these characteristics suggest that the γ-KCaPO4: Eu2+ phosphors combined with red phosphors could be applicable to near UV-based white LEDs, i.e., only two kinds of phosphor powders are needed for the formation of white light.
AB - Novel whitish-blue phosphors based on a phosphate host matrix, γ-KCaPO4: Eu2+, were prepared by a conventional solid-state reaction method using slightly phosphorus deficient conditions and their photoluminescence properties were investigated. The concentration quenching process, temperature dependence of the luminescence and decay curve were also investigated. The γ-KCaPO4: Eu2+ phosphor was efficiently excited by UV-Visible light at wavelengths of 200-450 nm and exhibited a bright whitish-blue emission with a maximum peak wavelength of 473 nm. All of these characteristics suggest that the γ-KCaPO4: Eu2+ phosphors combined with red phosphors could be applicable to near UV-based white LEDs, i.e., only two kinds of phosphor powders are needed for the formation of white light.
KW - Concentration quenching
KW - Phosphate phosphor
KW - Photoluminescence
KW - White LEDs
UR - http://www.scopus.com/inward/record.url?scp=79955549773&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79955549773&partnerID=8YFLogxK
U2 - 10.1016/j.optmat.2011.02.031
DO - 10.1016/j.optmat.2011.02.031
M3 - Article
AN - SCOPUS:79955549773
VL - 33
SP - 1036
EP - 1040
JO - Optical Materials
JF - Optical Materials
SN - 0925-3467
IS - 7
ER -