Abstract
BaY2F8 single crystals doped with Er3+ ions have been grown by the temperature gradient method. The absorption, excitation and emission spectra for Er3+-doped BaY2F8 crystals were measured at room temperature (297K) and 12K. The effect of temperature on the luminescence intensity and effective bandwidth was investigated in the range of 12–297K. The temperature dependence of the fluorescence intensity ratio (FIR) for the 522nm emission (2H11/2→4I15/2 transition) and the 552nm emission (4S3/2→4I15/2 transition) was also studied in the range of 12–297K. Based on the fitting FIR curve, the value of the constant term B (2.25) was obtained. The fitting FIR curve and FIR equation may have a potential application in the temperature measurement. In addition, the up-conversion spectrum at room temperature was recorded under excitation of 980nm and the up-conversion mechanism was analyzed in detail.
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