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Improving white light emission and quantum yield of Ce@Eu co‐doped silicate glass by reducing Eu3+ to Eu2+ with Si3N4.
- Source :
-
Journal of the American Ceramic Society . Mar2023, Vol. 106 Issue 3, p1778-1788. 11p. 2 Diagrams, 1 Chart, 8 Graphs. - Publication Year :
- 2023
-
Abstract
- Rare‐earth‐doped transparent glass shows great potential in white light‐emitting diodes (wLEDs) application due to its excellent optical and luminous properties. Currently reported commercial wLEDs have a drawback in red emission missing, which leads to a relatively low color rendering index (CRI) and a relatively high correlated color temperature (CCT). In this work, Ce@Eu Sr–Si–O glass is fabricated using a high‐temperature quenching method. The white light is available when the ratio of Ce3+/Eu3+ equals 1, and the emitting color can be adjusted from blue to red by controlling the ratio of Ce3+/Eu3+. To further optimize the white light, Eu3+ ions can be reduced to Eu2+ according to the reaction of 6Eu3+ + 2N3− → 6Eu2+ + N2↑ by introducing Si3N4. As a result, the standard white light emission can be achieved in the Ce@Eu silicate glass contributed by the blue light from Ce3+, red light from Eu3+, and yellow–green light from Eu2+ (two elements, three emission). This glass shows excellent luminous properties, such as a color coordinate is (0.3651, 0.3269) in CIE 1931 color coordinate diagram, a CRI is over 70, a high quantum yield of 36.02%, and a CCT of 4117 K. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PHOTONS
*DOPING agents (Chemistry)
*GLASS
*LIGHT emitting diodes
*SILICATES
Subjects
Details
- Language :
- English
- ISSN :
- 00027820
- Volume :
- 106
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Journal of the American Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 161084820
- Full Text :
- https://doi.org/10.1111/jace.18885