Abstract
The characteristics of SnO 2 reduced in H 2/N 2 at various annealing temperatures are reported. The formation of polycrystalline metallic Sn from SnO 2 is detected by X-ray diffraction above the annealing temperature of 500 °C. The photoluminescence (PL) characteristics of reduced SnO 2 have been studied as a function of temperature. Further studies of Fourier transform infrared (FTIR), differential thermal analysis (DTA-T g), and photoluminescence excitation (PLE) spectroscopy have been performed. Broad emission with peaks at around 590 nm (2.1 eV) and 420 nm is obtained from SnO 2. The reduced SnO 2 shows an increase PL intensity of 420 nm band. In addition the PL intensity of reduced SnO 2 at 420 nm (2.95 eV) increases with annealing in ambient air. The origin of luminescence bands detected in reduced tin oxide is discussed.
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