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Structure and white LED properties of Ce-doped YAG-Al2O3 eutectics grown by the micro-pulling-down method.
- Source :
-
CrystEngComm . 8/21/2019, Vol. 21 Issue 31, p4545-4550. 6p. - Publication Year :
- 2019
-
Abstract
- A series of Ce-doped YAG-Al2O3 eutectics were grown by the micro-pulling-down (μ-PD) method, for the purpose of high power white light emitting diodes. The eutectic structure was investigated. A calibrated integrating sphere spectrometer setup was used to measure the white LED properties of eutectic samples. The CIE color coordinates can be regulated easily by altering the Ce3+ doping concentration and sample thickness of the Ce:YAG-Al2O3 eutectics. A 1 W white LED device based on Ce:YAG-Al2O3 eutectics at a rated current of 350 mA emitted a bright white light with a CIE coordinate of (0.319, 0.334), a luminous efficacy of 83.0 lm W−1 and a Duv value of 0.003. The results showed that Ce:YAG-Al2O3 eutectics have better luminescence properties than commercial powder phosphors at a high current density. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PHOSPHORS
*HYPEREUTECTIC alloys
*EUTECTICS
Subjects
Details
- Language :
- English
- ISSN :
- 14668033
- Volume :
- 21
- Issue :
- 31
- Database :
- Academic Search Index
- Journal :
- CrystEngComm
- Publication Type :
- Academic Journal
- Accession number :
- 137911913
- Full Text :
- https://doi.org/10.1039/c9ce00703b