Photoluminescence Properties of SnO₂·H₂O Phosphor

SnO 2 ·H 2 O phosphor was synthesized by chemically etching metallic tin in aqueous HNO 3 solution. The optical properties of the synthesized phosphor were investigated by diffuse reflectance measurement, photoluminescence (PL) analysis, and PL excitation (PLE) spectroscopy. SnO 2 ·H 2 O phosphor exhibited red (R) and green (G) emission bands with peaks at ∼600 and ∼500 nm, respectively. The PL spectra showed a clear dependence not only on lattice temperature but also on excitation light wavelength and power. The R emission band showed a single excitation peak at ∼4 eV, while the PLE spectrum of the G emission band exhibited three main peaks at ∼3.9, ∼4.5, and ∼5.4 eV. Such PL properties were interpreted considering electron transfer at excited states and using the configurational-coordinate model. The PL properties of SnO 2 ·H 2 O phosphor were also discussed in comparison with those of SnO 2 nanomaterials.