Ce:(Y1-xLux )3Al5O12 single-crystal phosphor plates for high-brightness white LEDs/LDs with high-color rendering (Ra > 90) and temperature stability

Stelian Arjoca, Encarnación G. Víllora, Daisuke Inomata, Kazuo Aoki, Yoshiyuki Sugahara, Kiyoshi Shimamura

研究成果: Article査読

29 被引用数 (Scopus)

抄録

Ce:(Y1-xLux)3Al5O12 single-crystals are investigated in detail as phosphors for high-brightness LEDs and LDs. It is demonstrated that single-crystal phosphor plates (SCPPs) present very advantageous characteristics in comparison with standard powder phosphors. On the one side, the very high quantum efficiency of the SCPPs does not decrease with the temperature increase, and on the other side, the SCPPs possess a high thermal conductivity, so that these can be efficiently cooled to avoid device overheating. The optical properties of these SCPPs are investigated from room temperature to 300 °C. Ce:Y3Al5O12 SCPPs are adequate for high-brightness cool white light sources. Instead, Ce:(Y1-xLux)3 Al5O12 SCPPs, whose emission shifts to the green with the Lu concentration, are very promising for neutral and warm white light sources in conjunction with a red-phosphor. It is shown that these white sources exhibit a color rendering over 90 for a wide range of excitation and SCPP emission wavelengths.

本文言語English
論文番号025041
ジャーナルMaterials Research Express
1
2
DOI
出版ステータスPublished - 2014 6月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 表面、皮膜および薄膜
  • ポリマーおよびプラスチック
  • 金属および合金

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