Figure 6: (a) PL emission from samples A, A2, A2 (Ag)-1, and A2 (Ag)-2. Inset graph shows the optical absorption of each sample. PL lifetime fitting parameters are shown in the inset table. (b) Hydrogen depth profile of each sample, Ag depth profile (filled gray circles) by RBS, and Si depth profile (open gray rhombs) by SRIM simulation are shown for comparison.