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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
  • 19
    Citations
  • 0
    Usage
  • 10
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    19
    • Citation Indexes
      19
  • Captures
    10
  • Mentions
    1
    • News Mentions
      1
      • News
        1

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.

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