Figure 8
Temperature-dependent luminescent spectra of (a) Sr 2- x Si 5 N 8 :Eu x ( x = 0.02) (b) Sr 2- x Si 5 N 8 :Eu x ( x = 0.10), and (c) Ba 2- x Si 5 N 8 :Eu x ( x = 0.10) heated and reversely cooled as functions of the temperature (25°C to 300°C ). Plot of the relative intensity against the temperature is inserted. (Reprinted with permission from reference [16]. Copyright 2012, American Chemical Society).