Abstract
Homogeneous luminescent Eu3+-doped Y3Al5O12 (YAG : Eu3+) films were successfully synthesised by facile sol–gel technology via multi-layers deposition process on quartz substrate. The crystallisation, morphology and optical properties of as-prepared samples were investigated by X-ray diffraction, scanning electron microscopy and spectrofluorophotometry. And the effect of metal-ions' concentration in sol on the crystallinity of as-prepared films was also studied. Our results showed that the concentration of metal ions in sol played a crucial role on crystallinity of as-prepared films. With a concentration of 1 mol L−1 metal ions in sol, well crystallised YAG : Eu3+ films with a thickness of about 2·20 μm and grains size of about 80 nm were obtained on quartz substrate via spin-coating technology from 20 layers deposition. The as-synthesised YAG : Eu3+ films show high transparency, excellent photoluminescence performance at red-light range under 394 nm excitation, suggesting that it has promising applications for lighting displays and field emission displays.
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