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A Eu2+ doped sulfureted NIR-emitting garnet phosphor Ca3(Sc, Eu)2Si3(O, S)12: Eu2+ is successfully designed and synthesized. Notably, a strategy for regulating the initial valence state of dopants is proposed by using prepared EuS instead of the conventional Eu2O3 as raw material, enhancing the NIR emission by 135 %. Moreover, a sulfuration strategy is further introduced to enhance the NIR emitting intensity and internal quantum efficiency by 192 % and 167.8 %, and to improve thermal stability by 154 % at 120 ◦C. The luminescence origin of the unusual broadband NIR emission is re-examined through chemical unit co-substitution strategy by introducing [Al3+–Hf4+] to replace [Sc3+–Si4+] ion pairs.

Rights:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

Keyword: Garnet structure, Eu2+, Sulfuration strategy, Broadband NIR emission, pc-NIR LED

Date published: 2024-08-24

Publisher: Elsevier

Journal:

• JOURNAL OF COLLOID AND INTERFACE SCIENCE (ISSN: 00219797) vol. 678 p. 209-217

Funding:

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5480

First published URL: https://doi.org/10.1016/j.jcis.2024.08.170

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Updated at: 2026-02-14 20:22:43 +0900

Published on MDR: 2026-08-24 08:25:33 +0900