白光LED用Eu掺杂红色荧光粉

白光LED因亮度高、体积小、寿命长、高效节能、绿色环保等优点而引起人们的广泛关注,但是目前大部分白光LED用荧光粉的不足之处在于其发光效率较低,显色指数较差,色温较高,成本较高等等。红色荧光粉可明显改善白光LED的色温和显色指数,因此红色荧光粉在调制白光LED和改善其显色指数方面具有至关重要的作用。近年来红色荧光粉得到了深入研究,并有不少文献报道了新型的红色荧光粉。本文介绍了Eu~(3+)掺杂的线状红光发射荧光粉、Eu~(2+)掺杂的带状红光发射荧光粉并着重介绍了Eu~(2+)掺杂的新型窄带红光发射荧光粉,以及目前Eu掺杂红色荧光粉发展的不足及其改善方法。

Red Phosphors Doped by Eu Used in White LED

The white LED with advantages of high brightness, small volume, long service life, high efficiency, energy saving and green environmental protection arouses wide attention. But currently most of the phosphors used in white LED also owns some drawbacks such as low luminous efficiency, poor color rendering index, high color temperature, high cost. However, red phosphors can obviously improve the luminous efficacy and color rendering index of the white LED, so the red phosphors in white LED play an important role in improving its color rendering index modulation. In recent years, red phosphors have been deeply studied and a lot of new type red phosphors have been reported. This paper introduces the red line emission phosphors doped by Eu³⁺, the band red emission phosphors doped by Eu²⁺, and emphatically introduces the narrow band red emission phosphors doped by Eu²⁺. The development of Eu doped red phosphors, the methods to improve the deficiency of the phosphor, as well as the recent frontier and development tendency of red phosphors are also introduced.