A near-infrared luminescent material, a preparation method and application thereof

Abstract

This invention discloses a near-infrared luminescent material, its preparation method, and its applications. This invention belongs to the field of near-infrared luminescent materials. The method involves adding Al source, H3BO3, and other raw materials to a SiO2 matrix to suppress Sm. 3+ The light emission, thereby realizing Sm 2+ Near-infrared emission ultimately yields only Sm 2+ Near-infrared luminescent materials with luminescent properties. This process can not only suppress Sm 3+ The orange glow enhances color purity and can also significantly improve Sm. 2+ Luminescent properties. The near-infrared luminescent material of this invention has a chemical composition of Si. 1‑ x Al x B y N z O 2‑z :Sm m ,Ln n The formula Ln represents one or more elements selected from Yb, Eu, Gd, and Ce; where 0 ≤ x ≤ 0.1, 0 ≤ y ≤ 0.5, 0 ≤ z ≤ 0.5, 0 ≤ m ≤ 0.1, and 0 ≤ n ≤ 0.1. This material can be excited by light in the wavelength range of 300–600 nm, thereby emitting narrowband near-infrared light at 683 nm. Therefore, this luminescent material can convert ultraviolet, violet-blue, and green light into near-infrared light. The near-infrared luminescent material of this invention has a simple, pollution-free synthesis method, can be mass-produced, has stable chemical properties, and has a wide range of applications.

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