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Photoluminescence, and optically stimulated luminescence in ZnB2X4 (B; Li,Na,K: X; Cl,Br) compounds doped with Cu+ or Ag+ were studied. Double humped emission bands attributable to the activators were observed in all the samples. The observed photoluminescence of Cu+ and Ag+ could be identified with 3d94s1↔3d10 and 4d95s1↔5d10 transitions respectively. The longer wavelength band (400–500 nm range)...
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