Rapid Synthesis of Eu2+ and Dy3+ Co-doped SrAl2O4 Thick Film by Chemical Vapor Deposition and Its Photoluminescence Properties

Eu 2+ and Dy 3+ co-doped SrAl 2 O 4 (Eu 2+ , Dy 3+ :SrAl 2 O 4 ) has a wide range of applications as a persistent phosphor.We demonstrate the rapid synthesis of Eu 2+ , Dy 3+ :SrAl 2 O 4 thick film phosphors grown by laser-assisted CVD at deposition temperatures of 1010-1163 K, total chamber pressures of 280-6000 Pa, and Sr molar ratios in precursor vapor of 28.0-93.2at%.A (100)-oriented Eu 2+ , Dy 3+ :SrAl 2 O 4 thick film was epitaxially grown on a c-cut sapphire substrate.Under UV irradiation, the film exhibited a green emission originating from 4f 6 5d 1 4f 7 transitions of Eu 2+ ions.