Abstract
Zinc gallate (ZnGa₂O₄) thin film phosphors have been formed on ITO glass substrates by a sol-gel spinning coating method. For the formation of the film phosphors, the starting materials of zinc acetate dihydrate, gallium nitrate hydrate and 2-methoxyethanol as a solution were used. The thin films deposited were firstly dried at 100℃ and fired at 500℃ or 600℃ for 30 min and then, annealed at 500℃ or 600℃ for 30 min under an annealing atmosphere of 3% H₂/Ar. The thin films deposited on ITO glass plates showed the (220), (222), (400), (422), (511), and (440) peaks of spinel structure as well as the (311) peak indicating a standard powder diffraction pattern. The surface morphologies of the thin film phosphors were observed with a firing and an annealing condition. The ZnGa₂O₄ film phosphors showed the blue emission spectra around 410 ㎚ as well as the emission spectra in the UV region (360-380 ㎚).
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