Green luminescent material for infrared excitation

Abstract

The invention discloses a green luminescent material for infrared excitation, which comprises a matrix material namely strontium sulfide, wherein the matrix material is added with an activator containing cerium, a co-activator containing samarium and a fluxing agent containing lithium chloride, and the mixture is sintered at a high temperature in a protective atmosphere. The prepared luminescent material, after absorbing ultraviolet light, does not have long-lasting phosphorescence, and can release green fluorescent light for a long time under the irradiation of infrared light. The green luminescent material can be used for detecting, tracking, checking and identifying invisible near infrared light, and can be widely used in the technical fields of a plurality of subjects such as near infrared laser detection, laser facula display, optical fiber communication instruction, optical information storage, X-ray image processing, infrared imaging and the like.

Description

technical field [0001] The invention belongs to the technical field of infrared laser detection and luminescent material application. Background technique [0002] Light-stimulated luminescent materials are also called electron-trapping luminescent materials or infrared luminescence luminescent materials. Light-stimulated luminescence means that when the luminescent materials are irradiated with high energy and short wavelengths, the free electrons and holes generated are trapped in the traps inside the crystal. The energy is stored, and when it is stimulated by infrared low-energy long-wave light again, these electrons and holes will break away from the trap and produce recombination luminescence. [0003] The existing materials are mainly barium fluoride and calcium strontium sulfide doped with rare earth activator europium. The former absorbs X-ray energy and emits light under red laser irradiation. It is a good X-ray image storage material, but it cannot be realized. Vi...

AI Technical Summary

Problems solved by technology

But its disadvantage is that when this kind of material detects microstrip visible red luminescence 808nm wavelength laser, the red-orange luminescence emitted by itself is mixed with the red light in the excitation light, which cannot be effectively distinguished, and the practical application range is limited. It is greatly restricted, such as the commercially available product grades HT582 and HT612 of Shanghai Kerun Optoelectronics Technology Co., Ltd.

[0004] In addition, the existing near-infrared laser detection up-conversion luminescent materials are mainly rare earth system materials, which have the characteristics of narrow excitation and emission spectra, Chinese patent 96122293.X, Chinese patent 01138927.3, Chinese patent 01138920.6, US5541012, US7648648, etc Its preparation method is described, and its shortcoming is that it cannot detect a wide range of near-infrared light bands, such as the commercially available product brand HT111