Authors: Vijay Singh N Singh S Watanabe T K Gundu Rao M S Pathak A K Srivastava P K Singh S J Dhoble
Publish Date: 2017/02/06
Volume: 46, Issue: 4, Pages: 1943-1947
Abstract
Gadoliniumactivated CaZr4O9 ultravioletBemitting phosphor has been prepared by a solution combustion method and characterized using powder xray diffraction analysis electron paramagnetic resonance EPR and photoluminescence PL spectroscopic techniques Upon excitation at 274 nm the emission spectrum exhibits a welldefined ultraviolet B emission band with maximum at 313 nm corresponding to 6P7/2 → 8S7/2 transition A characteristic “U”type EPR spectrum is observed for the powder samples Doped Gd3+ ion appears to occupy calcium sites in the phosphor lattice EPR and PL analyses of the sample confirm presence of Gd3+ in the CaZr4O9 host
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