High-excited-state splitting and multimode vibrational coupling in Mn4+-activated fluoride phosphor

Excited-states play a crucial role in the optical absorption and luminescence of solids and hence their accurate information is highly desired. Herein, we attempt to seize the excited-states information of Mn 4+ ions in K 2 SiF 6 microcrystals via measuring and calculating their variable-temperature...

Full description

Saved in:
Bibliographic Details
Published in:Science China. Physics, mechanics & astronomy mechanics & astronomy, 2024-03, Vol.67 (3), p.234212, Article 234212
Main Authors: Zhang, Debao, Ye, Wanggui, Cao, Xuguang, Zhou, Ji, Tang, Fei, Zheng, Changcheng, Ning, Jiqiang, Xu, Shijie
Format: Article
Language:English
Subjects:
Astronomy
Classical and Continuum Physics
Coupling
Cryogenic temperature
Excitation
Excitation spectra
Fluorides
Jahn-Teller effect
Lasers
Lattice vibration
Low temperature
Manganese ions
Microcrystals
Observations and Techniques
Phosphors
Photoluminescence
Physics
Physics and Astronomy
Raman spectra
Spectrum analysis
Splitting
Temperature
Vibration mode
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Excited-states play a crucial role in the optical absorption and luminescence of solids and hence their accurate information is highly desired. Herein, we attempt to seize the excited-states information of Mn 4+ ions in K 2 SiF 6 microcrystals via measuring and calculating their variable-temperature photoluminescence excitation (PLE) spectra. At cryogenic temperatures, an unpredicted splitting of the high-excited-state is observed. Moreover, the two-split high-excited-state levels are further revealed to primarily couple with the two hyperfine split modes of quasi-localized v 2 vibration in the distorted Mn-F 6 octahedral configuration, whereas the coupling strengths are found to be substantially different from each other. The slightly split vibrational mode is firmly supported by the low-temperature Raman spectra. Jahn-Teller lattice distortion is believed to be responsible for the observed splitting of the electronic high-excited-state and the quasi-localized vibrational mode.
ISSN:1674-7348
1869-1927
DOI:10.1007/s11433-023-2292-5