白光LED具有工作电压低、功耗低、可靠性高、使用寿命长、环境友好和高能效等一系列优点,是未来照明光源的发展方向.利用LED技术实现白光的方法主要有3种,其中采用蓝光、紫光及近紫外LED芯片激发红、绿、蓝等三基色或多基色荧光粉得到白光LED的技术具有成本低、显色性好等优势,是白光LED的主要发展方向.红色荧光粉在调制白光的色温及改善其显色性等方面起重要作用,其制备技术是目前制约白光LED大规模应用的关键技术,亟待解决.详细介绍了白光LED用红色荧光粉的十余个主要材料体系的发光性能、基本制备方法、取得的研发进展,简单探讨了其未来发展趋势.
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