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本文综合评述了近年来氮(氧)化合物荧光粉的制备方法、发光性质、机理及其在白光LED中的应用情况。这类荧光粉因其结构的多样性和电子云扩大效应的影响,一般在紫外-蓝光区具有高的吸收效率,并且随着基质和激活离子的改变,发射光谱可覆盖整个可见光区域,因此它们适用于荧光粉转换型白光LED。利用氮(氧)化合物封装的白光LED具有高的发光效率、色坐标稳定性、显色指数和可调节的色温,进一步显示它们将是一类在白光LED上非常适用的材料。最后本文指出了氮(氧)化合物荧光粉研究中尚未解决的问题。
This review summarizes the preparation, luminescent properties, mechanism and application of nitrogen (oxygen) compounds in white LEDs in recent years. Due to their structural diversity and electron cloud expansion effects, such phosphors generally have high absorption efficiency in the UV-blue region, and the emission spectrum covers the entire visible light region as the matrix and the activated ions change. Therefore, For phosphor conversion white LED. White LEDs encapsulated with nitrogen (oxygen) compounds have high luminous efficiency, color coordinate stability, color rendering index and adjustable color temperature, further indicating that they will be a class of very suitable materials for white LEDs. Finally, this paper points out the unresolved problems in the research of nitrogen (oxygen) compound phosphors.