UV radiation emitting Gd3+ activated Sr2SiO4 host system prepared by sol-gel procedure: structural, electron paramagnetic resonance, and luminescence studies. - Singh, Vijay; Singh, N.; Pathak, M. S.; Kaur, Sumandeep; Jayasimhadri, M.; Watanabe, S.; Gundu Rao, T. K. (Journal of Materials Science: Materials in Electronics, 2018)