Back to Search
Start Over
Eu2+-activated MgAl2Si4O6N4: a novel oxonitridoalumosilicate blue phosphor for white LEDs.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 11/21/2022, Vol. 51 Issue 43, p16639-16647, 9p
- Publication Year :
- 2022
-
Abstract
- Recently, blue-emitting phosphors have attracted great interest due to their application in full-spectrum white light illumination. In this paper, a novel blue-emitting MgAl<subscript>2</subscript>Si<subscript>4</subscript>O<subscript>6</subscript>N<subscript>4</subscript>:Eu<superscript>2+</superscript> phosphor was successfully synthesized through the solid-state reaction method in a reducing atmosphere. Under the excitation of near-ultraviolet (n-UV) light, the MgAl<subscript>2</subscript>Si<subscript>4</subscript>O<subscript>6</subscript>N<subscript>4</subscript>:0.02Eu<superscript>2+</superscript> phosphor effectively emits a broad blue emission band centered at 456 nm with the FWHM as large as 81 nm. With the increasing Eu<superscript>2+</superscript> concentration, the emission bands of MgAl<subscript>2</subscript>Si<subscript>4</subscript>O<subscript>6</subscript>N<subscript>4</subscript>:Eu<superscript>2+</superscript> shift to a shorter wavelength and the FWHMs broaden gradually. Moreover, the MgAl<subscript>2</subscript>Si<subscript>4</subscript>O<subscript>6</subscript>N<subscript>4</subscript>:0.02Eu<superscript>2+</superscript> phosphor exhibits a slight thermal quenching at a higher temperature. After fabricating the as-prepared MgAl<subscript>2</subscript>Si<subscript>4</subscript>O<subscript>6</subscript>N<subscript>4</subscript>:0.02Eu<superscript>2+</superscript> phosphor into a white LED device, the intense neutral white light emission is obtained with excellent CRI (87.4) and CCT (5645 K). These results suggest that the blue MgAl<subscript>2</subscript>Si<subscript>4</subscript>O<subscript>6</subscript>N<subscript>4</subscript>:Eu<superscript>2+</superscript> phosphor is a promising candidate in n-UV excited white LEDs. [ABSTRACT FROM AUTHOR]
- Subjects :
- PHOSPHORS
HIGH temperatures
TERBIUM
Subjects
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 51
- Issue :
- 43
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 160064251
- Full Text :
- https://doi.org/10.1039/d2dt02718f