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We have examined the aging behavior of some residual impurities in CdTe single crystals grown by vertical Bridgman method. The emission intensities of neutral donor bound exciton (D 0 , X) and neutral acceptor bound exciton (A 0 , X) related to Ag, P, Li and Na are found to obviously decrease with the aging time. This behavior, in the cases of Ag, Li and Na, is attributed to the instability...
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