The maximum emission peak underwent a red shift to 594 nm and the emission ratios (F425/F594) were sensitively and proportionately decreased with increasing concentration of Cr3+ (Fig. 3).
The maximum emission peak underwent a red shift to 594 nm and theemission ratios (F425/F594) were sensitively and proportionately decreasedwith increasing concentration of Cr3+ (Fig. 3).