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Highly efficient and thermally robust single-component white-emitting Ca3LuAl3B4O15:Bi3+,Tb3+,Eu3+ phosphors for UV LEDs.
- Source :
-
Ceramics International . May2023:Part A, Vol. 49 Issue 9, p13570-13577. 8p. - Publication Year :
- 2023
-
Abstract
- Single-component white phosphor is highly desirable to obtain efficient and stable white light-emitting diodes (w-LED). In this paper, a series of Bi3+, Tb3+, and Eu3+ doped Ca 3 LuAl 3 B 4 O 15 (CLAB) luminescent materials were successfully prepared. The structure, morphology, and optical properties of samples were characterized by X-ray diffractometer, scanning electronic microscopy, and fluorescence spectroscopy, respectively. The synthesized phosphor exhibits strong blue band emission from Bi3+ and intense characteristics line emission from Tb3+ and Eu3+ under ultraviolet (UV) light excitation. The emission color can fine be adjusted by changing the doping content of the three activators. The warm white light of CLAB:0.5%Bi3+,2%Tb3+,0.75%Eu3+ with CIE chromaticity coordinates of (0.3728,0.3166), a CCT of 3671 K, and a Ra index of 87 could be realized under UV light excitation. The fabricated w-LED by combining UV chip with CLAB:0.5%Bi3+,2%Tb3+,0.75%Eu3+ shows excellent thermal stability after high-temperature aging test, implying its promising application in single-phosphor-converted warm w-LEDs. A single-phosphor-converted warm w-LED fabricated by UV chip with CLAB:Bi3+,Tb3+,Eu3+ shows thermally robust properties. [Display omitted] [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 49
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 162705443
- Full Text :
- https://doi.org/10.1016/j.ceramint.2022.12.233