“…Recently, studies have been performed on the structural, electrical, vibrational, and optical characteristics of a novel spinel persistent phosphor of ZnAl 0.095 Cr 0.05 O 4 prepared by solid-state and sol-gel techniques. 5,6,11 The interpretation of the ambient temperature Raman and infrared (ATR-IR) spectra has been completed. The direct transition behavior has been confirmed using Tauc's law, and the optical band gap E g has been determined from absorption UV/ vis spectra.…”