Ce/Mn/Cr: Y 3 Al 5 O 12 phosphor ceramics for white LED and LD lighting with a high color rendering index
Ceramics International, ISSN: 0272-8842, Vol: 49, Issue: 15, Page: 24703-24711
2023
- 19Citations
- 10Captures
- 1Mentions
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Most Recent News
Findings from Chinese Academy of Sciences Broaden Understanding of Ceramics Research (Ce/mn/cr: Y3al5o12 Phosphor Ceramics for White Led and Ld Lighting With a High Color Rendering Index)
2023 AUG 14 (NewsRx) -- By a News Reporter-Staff News Editor at Tech Daily News -- Researchers detail new data in Technology - Ceramics Research.
Article Description
Ce/Mn/Cr: Y 3 Al 5 O 12 transparent ceramics with a pure garnet structure and a high color rendering index were prepared by a solid-state reaction method. Mn 2+ and Cr 3+ enhance the emission between 500 and 700 nm and expand the conventional Ce: YAG phosphors spectrum. The Ce 3+ can work both, as activators and sensitizers, and the intense energy transfer from Ce 3+ to Mn 2+ /Cr 3+ is realized through the non-radiative and radiative processes. In the sample with the optimized doping concentration the high color rendering index (CRI) value of 75.3 can be achieved under a 450 nm laser diode excitation. The chromaticity coordinates can be tuned from (0.3125, 0.3232) to (0.2917,0.2851) by varying the doping concentration. With the increasing Mn 2+ /Cr 3+ doping concentration, the lifetime of Ce 3+, quantum efficiency and luminous efficiency are all gradually decreased. This work effectively offers a scheme for realizing the high color rendering performance of phosphor-converted transparent ceramics in white LEDs/LDs.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0272884223011707; http://dx.doi.org/10.1016/j.ceramint.2023.04.205; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85159878534&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0272884223011707; https://dx.doi.org/10.1016/j.ceramint.2023.04.205
Elsevier BV
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