CN-121991690-A - Antimonate near-infrared luminescent material and preparation method thereof

Abstract

The invention discloses an antimonate near-infrared luminescent material and a preparation method thereof. YGD (Sc 1‑x‑y Ga y )SbO 7 :xCr 3+ , wherein x=0.003-0.1 and y=0-0.97. The preparation method of the luminescent material comprises the steps of weighing corresponding raw materials of yttrium oxide, gadolinium oxide, scandium oxide, gallium oxide, antimony oxide and chromium oxide according to the stoichiometric ratio of the chemical formula, grinding and uniformly mixing the raw materials to obtain a mixture, filling the mixture into a crucible, sintering the crucible in an air atmosphere at 1100-1300 ℃ for 2-7 hours in a high-temperature furnace, and cooling the crucible to room temperature to obtain the antimonate near-infrared luminescent material.

Inventors

• MA SHUANGBIN
• DENG DEGANG
• LI CHENXIA
• YE RENGUANG
• HUANG FEITING
• CHEN JINGAO
• SHAO BING

Assignees

• 浙江好易点科技股份有限公司

Dates

Publication Date

20260508

Application Date

20260112

Claims (3)

1. 1. The antimonate near-infrared luminescent material is characterized by having a chemical formula of YGD (Sc 1-x-y Ga y )SbO 7 : xCr 3+ , wherein x=0.003-0.1 and y=0-0.97).
2. 2. A method for preparing the antimonate near infrared luminescent material of claim 1, which is characterized by comprising the following steps: Weighing corresponding raw materials according to a chemical formula YGD (stoichiometric ratio of Sc 1-x-y Ga y )SbO 7 : xCr 3+ ), wherein the raw materials are yttrium oxide, gadolinium oxide, scandium oxide, gallium oxide, antimony oxide and chromium oxide respectively, x=0.003-0.1 and y=0-1, grinding and uniformly mixing to obtain a mixture, loading the mixture into a crucible, sintering the mixture in a high-temperature furnace for 2-7 hours under a specific atmosphere and at 1100-1300 ℃, and cooling to room temperature to obtain the antimonate near-infrared luminescent material.
3. 3. The method of producing a near infrared antimonate luminescent material according to claim 2, wherein the specific atmosphere is an air atmosphere.

Description

Antimonate near-infrared luminescent material and preparation method thereof Technical Field The invention relates to the technical field of luminescent materials, in particular to an antimonate near-infrared luminescent material and a preparation method thereof. Background The near infrared luminescent material has been widely studied for its wide applicability in biomedical imaging, nondestructive testing, night vision technology and balcony illumination plant light filling. Unlike conventional near infrared light sources such as halogen lamps or tungsten halogen lamps, these materials exhibit superior characteristics in terms of luminous efficiency, operational stability, and structural flexibility. By virtue of the key advantages of low cost, high efficiency, compact structure, excellent portability and the like, pc-LEDs based on the material have great potential in intelligent optoelectronic device integration application. However, the design and synthesis of high performance near infrared luminescent materials remains a central research goal in this area. At present, activator ions such as Eu 2+、Mn2+、Ni2+ and Cr 3+ have been widely studied as broadband near infrared emission centers. However, determining a suitable host lattice provides a sufficiently strong crystal field environment for Eu 2+ and Mn 2+ ions, thereby inducing large crystal field splitting and achieving emissions above 800nm remains a significant challenge. Eu 2+ or Mn 2+ doped luminescent materials have been reported to be capable of near infrared emission, but the development of their systems still faces significant limitations. Ni 2+ ions are considered to be promising broadband near infrared emitters whose emission band is capable of covering the NIR-II window (1000-1600 nm), but their emission efficiency is still relatively low. In contrast, the Cr 3+ -activated luminescent material exhibits excellent broadband near infrared emission properties. They exhibit a pronounced absorption capacity in the blue region, whose emission wavelength can be tuned over a broad spectral range of 600 to 1400 nm. The tuning effect is highly dependent on the strength of the surrounding crystal field. In different intensities of the crystal field, cr 3+ ions (3 d 3) can exhibit different emission modes, with spin-forbidden 2E→4A2 transitions producing sharp emissions with long lifetime (in the order of milliseconds) at Jiang Jing fields, and spin-allowed 4T2→ 4A2 transitions producing wider emission bands with shorter lifetimes (in the order of microseconds) at weaker crystal fields. Based on the above characteristics, the most widely studied broadband near infrared luminescent material activated ions are currently. Cr 3+ activates the luminescent material, which is one of the research hot spots for near infrared materials for LEDs in recent years. Disclosure of Invention The invention aims to provide an antimonate near-infrared luminescent material and a preparation method thereof. In order to achieve the purpose, the invention adopts the technical scheme that the antimonate near-infrared luminescent material has the following chemical formula: YGd(Sc1-x-yGay)SbO7: xCr3+, Wherein x=0.003 to 0.1 and y=0 to 0.97. The preparation method of the antimonate near-infrared luminescent material comprises the following steps: Weighing corresponding raw materials according to a chemical formula YGD (stoichiometric ratio of Sc 1-x-yGay)SbO7: xCr3+), wherein the raw materials are yttrium oxide, gadolinium oxide, scandium oxide, gallium oxide, antimony oxide and chromium oxide respectively, x=0.003-0.1 and y=0-0.97, grinding and uniformly mixing to obtain a mixture, putting the mixture into a crucible, sintering the mixture in a high-temperature furnace for 2-7 hours under the specific atmosphere and at 1100-1300 ℃, and cooling to room temperature to obtain the antimonate near-infrared luminescent material. Further, the specific atmosphere in the invention is an air atmosphere. Compared with the prior art, the invention has the beneficial effects that: (1) The luminescent material of the invention takes antimonate as a matrix material, and the antimonate luminescent material has the advantages of good chemical stability, good thermal stability, low sintering temperature and the like. Compared with silicate near infrared luminescent materials, the invention has the advantages of low reaction temperature and simple synthesis process, has the advantages of good chemical stability and moisture resistance compared with phosphate and aluminate near infrared luminescent materials, and has the advantages of good chemical stability and thermal stability compared with fluoride near infrared luminescent materials. (2) The near infrared luminescent material is prepared by taking Cr 3+ as an activator, and has wider emission band (the half-width is about 117 nm) compared with other antimonate green luminescent materials, and in addition, the luminescent material has wid