Электронный каталог

Статья

Zeng, L.
Realization of Mn*6*+ NIR-II Broadband Emission in BaCrO&sub(4) and Its Nanolization Via Liquid-Solid Method / L.Zeng, B.A.Abdurakhimov, [a.o.] // Ceramics International. – 2025. – Vol. 51, No. 21, Pt. A. – P. 33045-33055. – URL: https://doi.org/10.1016/j.ceramint.2025.05.039. – Bibliogr.: 46.

There is a continuing effort to search for new fluorophore which emits broadband NIR-II light within 1000~1700 nm range. Mn&sup(6+) is a novel NIR luminescent center with 3d configuration, but finding a suitable host to stabilize Mn&sup(6+) valence and achieve its room-temperature emission remains a challenge. In this study, a Mn&sup(6+)- activated BaCrO&sub(4) NIR-II phosphor was firstly synthesized by using solid-state reaction. Due to the solo presence of CrO&sub(4) tetrahedrons for Mn&sup(6+) occupation in the BaCrO&sub(4) matrix, the valence state and luminescence stability of Mn&sup(6+) are effectively guaranteed. Unlike most of reported Mn&sup(6+)-activated systems, which could only exhibit NIR emission at nitrogen temperature, the BaCrO&sub(4): Mn&sup(6+) achieves efficient room-temperature NIR broadband emission under 564 nm excitation. Then, a liquid-solid method (ion exchange + post sinter) is proposed to obtain BaCrO&sup(4): Mn&sup(6+) nano phosphor while maintaining its NIR-II luminescence intensity. Confirmed by XPS and EDS analysis, Mn is found uniformly distributed in nano-particles with +6 valence state. The obtained BaCrO&sub(4): Mn&sup(6+) nano phosphor possessed high phase purity, spherical shape and uniform size of ~20 nm. The results reveal that our findings will explore an effective path to develop novel Mn&sup(6+)-activated NIR-II micro- and nanophosphors.



Спец.(статьи,препринты) = С 44 в - Новые химические реакции, соединения и реактивы
Спец.(статьи,препринты) = С 349.1 - Действие излучения на материалы$
ОИЯИ = ОИЯИ (JINR)2025