A rare earth borate-based red phosphor

Abstract

The invention discloses rare earth borate-based red fluorescent powder. According to the fluorescent powder, CaInBO4 is used as a base body, 0.02-0.08 at.% of Al<3+> is doped to enter In<3+> bit, 0.02-0.08 at.% of Ba<2+> is doped to enter Ca<2+> bit and 0.07-0.10 at.% of Eu<3+> is doped to enter In<3+> bit, so that fluorescent powder (In(1-x-z), Alx, Euz)(Ca(1-y), Bay)BO4 is obtained, wherein x is equal to 0.02-0.04, y is equal to 0.05-0.07, and z is equal to 0.07-0.1. The rare earth borate-based red fluorescent powder provided by the invention has excellent properties of high luminous intensity, warm color, rapid decay, short persistence, good heat stability, easiness in long-term preservation and wide application range.

Description

technical field [0001] The invention relates to the field of rare earth luminescent materials, in particular to a rare earth borate-based red fluorescent powder which can be applied to trichromatic fluorescent lamps and plasma flat panel displays (PDP). Background technique [0002] Most of the current commercial light sources need to use phosphors for light conversion. Fluorescent lamps made of rare earth tricolor phosphors are very efficient and energy-saving new light sources. They are the key development direction of the world's lighting sources. There is a huge demand for primary color phosphors, and the supply is basically in short supply. Because the rare earth three-color fluorescent lamp has the characteristics of high luminous efficiency, low light decay and long life, it has been widely recognized and developed rapidly in the current environment where energy conservation and emission reduction are vigorously advocated. my country is also the world's largest produc...

AI Technical Summary

Problems solved by technology

In recent years, many units at home and abroad have devoted themselves to the research of rare earth borate red phosphors, and prepared a series of red phosphors for lamps and displays (Y 2 o 3 : Eu 3+ 、YBO 3 : Eu 3+ ), and showed good optical properties, but compared with the currently commercialized phosphors, there are still some defects, such as low luminous efficiency, large light attenuation, impure chromaticity, etc.

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