Abstract
Photoluminescence properties and relaxation dynamics of electronic excitations in cesium vanadate CsVO3 have been studied upon pulse laser excitation in the wide temperature range of 6.5–300 K. A vibronic structure observed in low-temperature PL spectra is considered and interpreted. Peculiarities of luminescence relaxation dynamics and emission spectra of CsVO3 along with the appearance of the vibronic structure are explained in terms of strong electron-phonon coupling of excited electronic states and centrosymmetric vibrational modes in [VO4]3- center. A new approach in an interpretation of luminescence processes in vanadates is demonstrated.
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