四棱台状BiOCl∶0.03Eu^(3+)荧光粉的制备及发光性能研究

Study on preparation and luminescent properties of square pyramid-like BiOCl∶0.03Eu^(3+) phosphor

分别采用水解法、水解+煅烧法及水解+水热法合成了BiOCl∶0.03Eu^(3+)荧光粉,并采用拉曼光谱分析仪、X射线衍射仪(XRD)、扫描电子显微镜(SEM)和荧光光谱仪(PL),对所得样品的结构、形貌和发光性能进行表征.对比可知,水解+水热法合成的BiOCl∶0.03Eu^(3+)荧光粉的发光强度最佳.进一步研究了水热温度对所得荧光粉形貌及发光性能的影响.结果表明,随温度升高,样品颗粒形貌由不规则片状逐渐转变为四棱台状.160℃水热处理所得荧光粉的发光强度最佳,最强发射峰位于616nm处,色坐标位于(0.622 5,0.376 9),与标准红光点(0.67,0.33)最为接近,是一种有潜力的白光LED用红色荧光粉.

The BiOCl:0.03Eu3+phosphor was synthesized by hydrolysis,hydrolysis&calcination and hydrolysis&hydrothermal method,respectively.The structure,morphology and luminescence properties of the samples were characterized by Raman spectrometer,X ray diffraction(XRD),scanning electron microscope(SEM)and fluorescence spectrometer(PL),respectively.By comparision,hydrolysis&hydrothermal method is optimum for luminescence of BiOCl鈭?.03Eu3+phosphor.Thus,the effects of temperature on morphology and luminescence properties have been further investigated.The results showed that with the increasing of temperature,the irregular flakes gradually transformed into square pyramid.The luminescence intensity is the strongest when the temperature is up to160鈩?and the main peak is located at616nm.In addition,the color coordinate is located at(0.6225,0.3769)close to the standard red light point(0.67,0.33),which is a potential red phosphor for white LED.