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Description:

Cr3+-activated near-infrared emitting phosphor has a potential application in plant growth and sensing technologies. Herein, we synthesized near-infrared emitting La11x/3Al11x1yTixO3:yCr3+ phosphor by a solid-state reaction. La11x/3Al11x1yTixO3:yCr3+ (x = 0.2, y = 0.003) showed the near-infrared emission at 751 nm with a full width at half-maximum of 41 nm under 351 nm excitation. The internal and external quantum efficiencies were 54.4 and 25.5 %, respectively. The luminescence intensities at 150 °C of the La11x/3Al11x1yTixO3:yCr3+ (x = 0.1, 0.2, and 0.3, y = 0.003) were 32, 17, and 3 % of those at room temperature, respectively. The thermal quenching effect strongly occurred with increasing the amount of Ti and it was related to the change in the absorbance edge of the host material La11x/3Al11x1yTixO3.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Cr3+-activated phosphor, Near-infrared emission, Oxide, Solid state reaction

Date published: 2026-03-01

Publisher: National Institute for Materials Science

Journal:

• Journal of the Ceramic Society of Japan (ISSN: 13486535) vol. 134 issue. 3 p. 128-132 25160

Funding:

• ATLA JPJ004596

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.2109/jcersj2.25160

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Updated at: 2026-06-16 11:29:50 +0900

Published on MDR: 2026-06-16 12:26:20 +0900