Fig. 1From: Study of energy transfer mechanism from ZnO nanocrystals to Eu3+ ionsPL spectra of Eu3+:SiO2, ZnO-nc:SiO2 and Eu3+ 0.12:(ZnO-nc:SiO2) samples. Insets a) and b) show, respectively, the photograph of Eu3+:SiO2 and Eu3+ 0.12:(ZnO-nc:SiO2) samples excited using a mercury vapour UV lampBack to article page