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(a) Typical XRD pattern and (b) room-temperature PL spectrum of as-deposited thin films.
(a) XRD patterns and (b) refractive index of the as-deposited film after annealing at various temperatures in flowing argon.
(a) Room-temperature PL spectra; (b) the position and (c) the intensity of the PL peaks of films annealed in flowing argon; (d) the PL intensity of films annealed at as a function of the excitation laser power.
(a) XRD patterns of films annealed in argon at and that further annealed in oxygen at ; (b) PL spectrum of films annealed in argon at ; (c) PL spectra of films annealed first in argon and then in oxygen at (black curve) and the as-deposited films (red curve), respectively.
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