Abstract
SrGa_2S_4:Eu shows a saturated green luminescence and is expected to be one of green EL phosphor materials. Since a high burning temperature is required to crystallize SrGa_2S_4, it is hard to form SrGa_2S_4:Eu phosphor thin films on cheap glass substrates with a low softening temperature. To solve this problem, in this study, SrGa_2S_4:Eu phosphor thin films have been attempted to prepared by spin-coating method using submicron phosphor particles. Relatively uniform and dense SrGa_2S_4:Eu phosphor layers with a thickness of 1-3μm have been achieved by spin-coating using the particles having an average diameter of about 1μm. The obtained EL devices show a green luminescence with CIE color coordinates of (x,y)=(0.23,0.72), and the luminance under 1kHz driving is about 200cd/m^2.
