采用双坩埚嵌套高温固相法在950℃下成功地合成了Ba2Zn3:Cu荧光粉,探讨了工艺条件和Cu掺杂量对样品发光亮度的影响,用X射线粉末衍射(XRD)、扫描电子显微镜(SEM)和荧光分光光度计分别对其结构、形貌和发光性能进行了表征.结果表明:样品具有单一的Ba2ZnS3晶相结构;与Ba2Zn3基质不同,该荧光粉的激发光谱在近紫外区存在一个从275～350 nm的宽激发带,归因于Cu发光中心的吸收;该荧光粉在近紫外光激发下发出明亮的黄光,发射中心波长位于560 nm处,是一种良好的黄光材料.
Novel Ba2ZnS3 : Cu phosphors were successfully prepared by conventional solid reaction via a double-crucible method for the first time. The effect of the technological conditions and Cu doping concentration on luminescent properties of Ba2ZnS3 :Cu phosphors was observed. The crystal structure, morphology and photoluminescent properties of the particles were examined, respectively. XRD results indicate that the pure Ba2ZnS3 crystal structure was obtained at 950 ℃ for all samples. The Ba2ZnS3:Cu phosphors can excited effectively by 322 nm ultraviolet. The photoluminescence spectra show that the Ba2ZnS3 :Cu phosphor emits a yellow light with a broad emission band centered at 560 nm, which was a promising phosphor.
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