一种黄绿光LED用荧光粉:Ga_2S_3∶Eu^(2+)

Ga_2S_3∶Eu^(2+):Phosphor for Yellowish-green LED

用GaN基发光二极管（light—emitting diode．LED）与稀土发光材料组成的固体照明光源具有节能、寿命长、光效高、工作电压低、耗电量小、体积小、可平面封装、易于开发轻薄型产品等特点，被认为是21世纪的光源；另外，LED光源本身不含汞、铅等有害物质．无红外线和紫外线污染，不会在生产和使用中产生对外界的污染．是一种环境友好的光源。随着GaN基LED的发射波长向短波扩展，研究开发与GaN基管芯匹配的稀土发光材料受到广泛关注．

Eu^2＋ -activated Ga2S3 phosphors were synthesized by solid-state reaction and their luminescence properties were studied with diffuse reflection spectroscopy, excitation spectra, emission spectra and fluorescence lifetime. The parameters of LED manufactured with phosphors Ga2S3：Eu^2＋ were measured. The excitation spectra of these phosphors are broadband and can be matched with the emission wavelength of GaN chip.