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Preliminary results on the photoluminescence and optically stimulated luminescence in Cu‐doped and Ag‐doped ZnB 2 X 4 (B = Li, Na, K: X = Cl, Br) compounds
Author(s) -
Jog Milind,
Patil Rajesh,
More Yogesh,
Kulkarni Mukund,
Moharil Sanjiv
Publication year - 2018
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3377
Subject(s) - photoluminescence , luminescence , alkali metal , doping , octahedron , ion , analytical chemistry (journal) , materials science , zinc , inorganic chemistry , chemistry , optoelectronics , organic chemistry , chromatography , metallurgy
Photoluminescence , and optically stimulated luminescence in ZnB 2 X 4 (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 3d 9 4s 1 ↔3d 10 and 4d 9 5s 1 ↔5d 10 transitions respectively. The longer wavelength band (400–500 nm range) could be attributed to the Cu + or Ag + ion replacing alkali ion at the octahedral alkali site whereas short wavelength band (340–400 nm range) is attributed to a Cu or Ag ion at tetrahedral zinc site. The short wavelength band was found to be intense compared with long wavelength and gave an indication that most of the Cu or Ag ions prefered a tetrahedral Zn site compared with the octahedral alkali site. All the samples exhibit optically stimulated luminescence (OSL). The sensitivity was found to be lattice dependent. The lowest sensitivity of about 1% compared with Al 2 O 3 :C was observed in lithium lattices whereas highest the sensitivity of about 290% was observed in the case of Cu‐doped ZnNa 2 Br 4 .