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Mn5+-activated Ca6Ba(PO4)4O near-infrared phosphor and its application in luminescence thermometry

Dramićanin, Miroslav D.; Marciniak, Łukasz; Kuzman, Sanja; Piotrowski, Wojciech; Ristić, Zoran; Periša, Jovana; Evans, Ivana; Mitrić, Jelena; Đorđević, Vesna; Romčević, Nebojša; Brik, Mikhail G.; Ma, Chong-Geng

Mn5+-activated Ca6Ba(PO4)4O near-infrared phosphor and its application in luminescence thermometry Thumbnail


Miroslav D. Dramićanin

Łukasz Marciniak

Sanja Kuzman

Wojciech Piotrowski

Zoran Ristić

Jovana Periša

Jelena Mitrić

Vesna Đorđević

Nebojša Romčević

Mikhail G. Brik

Chong-Geng Ma


The near-infrared luminescence of Ca6Ba(PO4)4O:Mn5+ is demonstrated and explained. When excited into the broad and strong absorption band that spans the 500–1000 nm spectral range, this phosphor provides an ultranarrow (FWHM = 5 nm) emission centered at 1140 nm that originates from a spin-forbidden 1E → 3A2 transition with a 37.5% internal quantum efficiency and an excited-state lifetime of about 350 μs. We derived the crystal field and Racah parameters and calculated the appropriate Tanabe–Sugano diagram for this phosphor. We found that 1E emission quenches due to the thermally-assisted cross-over with the 3T2 state and that the relatively high Debye temperature of 783 K of Ca6Ba(PO4)4O facilitates efficient emission. Since Ca6Ba(PO4)4O also provides efficient yellow emission of the Eu2+ dopant, we calculated and explained its electronic band structure, the partial and total density of states, effective Mulliken charges of all ions, elastic constants, Debye temperature, and vibrational spectra. Finally, we demonstrated the application of phosphor in a luminescence intensity ratio thermometry and obtained a relative sensitivity of 1.92%K−1 and a temperature resolution of 0.2 K in the range of physiological temperatures.


Dramićanin, M. D., Marciniak, Ł., Kuzman, S., Piotrowski, W., Ristić, Z., Periša, J., …Ma, C. (2022). Mn5+-activated Ca6Ba(PO4)4O near-infrared phosphor and its application in luminescence thermometry. Light: Science and Applications, 11, Article 279.

Journal Article Type Article
Acceptance Date Aug 16, 2022
Online Publication Date Sep 22, 2022
Publication Date 2022
Deposit Date Nov 10, 2022
Publicly Available Date Nov 11, 2022
Journal Light: Science & Applications
Publisher Springer Nature [academic journals on]
Peer Reviewed Peer Reviewed
Volume 11
Article Number 279


Published Journal Article (Advance online version) (1.3 Mb)

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