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(a) PL spectra of films produced at various flow rate ratios , ranging from 8 /100 to 2 /100. (b) PL spectra of a film produced with and excited at 405 nm (3.06 eV) and 488 nm (2.54 eV) (with a constant laser power of 18 mW). The inset illustrates the proposed excitation-transfer process.
Evolution of the PL emission and the absorption spectra of a film, produced with , as a function of the annealing temperature in a atmosphere for 1 h.
Effect of the annealing temperature, in hydrogen atmosphere, on the IR spectra. The inset shows the exodiffusion spectrum of the as-deposited sample.
PL spectra evolution of the as-deposited sample as a function of the ambient annealing time at .
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