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説明:

A series of CaGdAlO4-type layered perovskite phosphors showing deep red luminescence (λem = 711 nm, λex = 338 nm) were synthesized via solid reaction. A comprehensive analysis via photoluminescence, X-ray photoelectron spectroscopy, thermoluminescence, and fluorescence decay revealed that the deep red luminescence is related to oxygen defects and particularly oxygen interstitials. The defects related luminescence was effectively regulated through partial substitution of multi-cationic sites (the Ca2+ site with Mg2+, Sr2+, Ba2+; the Gd3+ site with La3+, Y3+, Lu3+) and full substitution of the Gd3+ with Y3+. Remarkably, a 383.3% stronger luminescence was obtained through partial substitution with Lu3+, and the quantum yield of luminescence reached 28.74% which is higher than those of the most previously reported self-luminescence systems. A pc-LED device was fabricated with the phosphor, and the device was showed to have potential application in indoor plant cultivation.

権利情報:

• In Copyright
  

キーワード: CaGdAlO4 perovskite, Defect luminescence, Cation substitution, NIR-LED

刊行年月日: 2023-10-21

出版者: Royal Society of Chemistry (RSC)

掲載誌:

• DALTON TRANSACTIONS (ISSN: 14779226) vol. 52 issue. 45 p. 16780-16790

研究助成金:

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4282

公開URL: https://doi.org/10.1039/D3DT02805D

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更新時刻: 2024-10-21 12:30:33 +0900

MDRでの公開時刻: 2024-10-21 12:30:33 +0900