Abstract
• In this study, we focused mainly on the vibronic coupling induced luminescence behavior of Cr 3+ doped YAG deep-red transparent ceramics, and two highlights have been listed as below. • Room-temperature PL excitation spectrum was experimentally recorded, which was further theoretically simulated to reveal the underlying electron-phonon coupling interaction with giving different Huang-Rhys factor values. • The dominant phonon energy involving in the vibronic coupling process was determined to be 57 meV which was consistent with that of the fitting work on temperature-dependent PL integrated intensity.
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