Laser-lighting-application-based terbium heavily-doped gallium germanate green emitting phosphor and preparation method thereof

Abstract

The invention discloses laser-lighting-application-based terbium heavily-doped gallium germanate green emitting phosphor. A chemical formula of the laser-lighting-application-based terbium heavily-doped gallium germanate green emitting phosphor is Sr<2>(1-x)M<3>TbGe3O<14>:xTb<3+>(M=Al, Ga), wherein M is equal to Ga and Al, x is greater than or equal to 0 and is less than or equal to 0.30, and x isa relative mole number of a Tb<3+> ion occupying a divalent Sr ion. The invention further discloses a preparation method of the laser-lighting-application-based terbium heavily-doped gallium germanate green emitting phosphor. The laser-lighting-application-based terbium heavily-doped gallium germanate green emitting phosphor and the preparation method of the laser-lighting-application-based terbium heavily-doped gallium germanate green emitting phosphor have the advantages that (1), the preparation technology of the material is simple, and a target product has uniform particles; (2), a prepared sample emits bright green fluorescence under laser excitation; (3), a temperature quenching phenomenon cannot occur on the green emitting phosphor, with the temperature increasing, the light emitting intensity is reinforced on the contrary, and the excellent heat-quenching resistance performance is achieved; and (4), in a matrix, terbium can be heavily doped, and a high quantum saturation absorption rate is achieved.

Description

technical field [0001] The invention relates to the technical field of photoluminescent inorganic luminescent materials, in particular to a heavily terbium-doped gallogermanate green fluorescent powder based on laser lighting applications and a preparation method thereof. Background technique [0002] At present, laser diode (LD) white light lighting, as an emerging technology in the field of lighting, has become the focus of increasing attention in the upgrading of the LED industry. It has important applications in special fields such as car headlights, projectors, digital theaters, stage lights, and large-screen splicing. prospect. In laser display technology, the LED chip as the excitation light source will be replaced by a higher-power LD emission unit. The high-energy-density LD light source can provide a higher excitation light power density, thereby greatly improving the illumination brightness of the light source. Although LED lighting technology has been improving,...

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Problems solved by technology

Professor Xie Rongjun of Xiamen University found that nitrogen oxide yellow powder and nitride red powder can reach saturated absorption under high energy density excitation of LD. If the LD excitation power continues to increase, the luminous efficiency will decrease instead.

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