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Single crystals of , with extremely strong afterglow were investigated with photoconductivity experiments. The photocurrent excitation spectra were measured at 80 and 300 K and compared with photoluminescence excitation spectra. Experiments on single crystals without doping were also performed for comparison. The results are found to support a hole‐trapping model which has been used to explain the strong afterglow from this material.
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Yuan et al. (2000) studied this question.
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