Progress in preparation and surface modification of Mn4+-activated fluoride red phosphor
White light emitting diodes have great advantages over traditional light sources owe to their energy-saving,environmental protection,high efficiency,and so on,which have a wide range of applications in indoor lighting,outdoor lighting,automotive lamps and electronic backlighting devices.It is always the unremitting pursuit of researchers in this field to obtain warm white light emitting diodes with low correlated color tempera-ture(CCT=2 700-4 500 K),high color rendering index(CRI,Ra＞80),cost saving and suitable for human eyes.Red phosphor can effectively improve the shortcomings and enhance the luminescent performance of such devices,which plays an important role in high color rendering phosphor-converted white light emitting diodes.Therefore,its research and development is of great significance.In this paper,the research progress of Mn4+-doped fluoride red phosphor in recent years was reviewed,and the conventional and green preparation methods of this phosphor were introduced.In terms of the poor moisture stability of Mn4+-doped fluoride red phosphor,relevant studies on improving its moisture-resistance property were summarized.Prospectively,this review con-cludes with a brief view of potential challenges and future development directions of high-performance Mn4+doped fluoride phosphor.
red phosphorMn4+dopingfluoridesynthetic methodstability
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