In:
Journal of the American Ceramic Society, Wiley, Vol. 104, No. 8 ( 2021-08), p. 4014-4023
Abstract:
The Eu 2+ ‐activated nitride phosphors have been widely used in solid‐state lighting, but the applications in high‐power white‐light‐emitting diodes (wLEDs) field require higher thermal stability of luminescent materials. The oxidation of Eu 2+ and the damage of nitride host in the Eu 2+ ‐activated nitride phosphors are the two crucial reasons for the luminescence loss while operating. A superficial organic carbon modification is performed on the red‐emitting (Sr,Ca)AlSiN 3 :Eu 2+ phosphor via the incorporation of organic carbon by solution mixing and thermal post‐treatment under the N 2 ‐H 2 atmosphere. After the superficial organic carbon modification, the oxidation of Eu 2+ and the formation of impurity phases on the phosphor surface are effectively reduced. When the superficial organic carbon modified sample was treated in the 2 wt.% sucrose solutions, the relative brightness is strengthened by 2.15%, the thermal quenching characteristic is improved by 8.9% at 300℃, and the aging test results show an excellent thermal stability. All above indicate that the superficial organic carbon modification is a promising technique to enhance the thermal stability of analogous Eu 2+ ‐activated nirtide phosphors.
Type of Medium:
Online Resource
ISSN:
0002-7820
,
1551-2916
Language:
English
Publisher:
Wiley
Publication Date:
2021
detail.hit.zdb_id:
2008170-4
detail.hit.zdb_id:
219232-9
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