A kind of nitride orange-red fluorescent material and light-emitting device and its preparation method and application

Abstract

The invention belongs to the technical field of fluorescent materials and discloses a Ce 3+ Activated nitride orange-red fluorescent material and light-emitting device, preparation method and application thereof. The Ce 3+ The general formula of the activated nitride orange-red fluorescent material is HP‑Ca 1‑x‑y Sr y Ce x Si 1‑ z al z N 2 , HP is the abbreviation of high-pressure phase, Ce elements enter the crystal sites of Ca and / or Sr, as luminescent elements and activators, 0<x≤0.05, 0≤y≤0.05, 0≤z≤0.05. Ce provided by the present invention 3+ Activated nitride orange-red fluorescent materials can be effectively excited by blue light, and can be adjusted to achieve a maximum emission peak wavelength of 615nm and a maximum half-peak width of 4212cm ‑1 , the highest quantum yield reaches 56.3%, and has a good application prospect in the field of high-power lighting.

Description

technical field [0001] The invention belongs to the technical field of fluorescent materials, in particular to a Ce 3+ Activated nitride orange-red fluorescent material and light-emitting device as well as its preparation method and application. Background technique [0002] With the advantages of low energy consumption, high energy conversion efficiency, and long service life, solid-state lighting sources have completely replaced traditional incandescent and mercury lamps. With the emergence of the third-generation semiconductor materials represented by GaN, solid-state lighting technology is developing in the direction of high current, high power density, and high brightness. Due to the higher power density, the fluorescent material will withstand higher thermal radiation and be excited by higher photon density, resulting in luminescence saturation. Luminous saturation is currently one of the most important factors limiting the development of high-power lighting. Theref...

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Problems solved by technology

[0008] The purpose of the invention is to overcome existing Ce 3+ Doped orange / red fluorescent materials cannot be practically applied due to various deficiencies, and provide a Ce that can be effectively excited by blue light, with a quantum efficiency of up to 56.3% and an emission spectrum that can cover the range of 500-800nm. 3+ Activated nitride orange-red fluorescent material and light-emitting device, preparation method and application thereof

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