Green emission from a Eu2+-activated SrAl2O4 phosphor: a photoluminescence and electron spin resonance study. - Singh, Vijay; Singh, N.; Pathak, M. S.; Jeong, Hakyung; Watanabe, S.; Rao, T. K. Gundu; Dubey, V.; Rai, V. K. (Journal of Materials Science: Materials in Electronics, 2018)