Rare earth/quantum dot composite upper conversion luminous material as well as preparation method and application thereof

Abstract

The invention relates to a rare earth / quantum dot composite upper conversion luminous material as well as a preparation method and application thereof. The composite material is prepared from two parts including a rare earth upper conversion luminous material and a quantum dot. The composite material has the advantages that the preparation is simple; the rare earth upper conversion luminous material and the quantum dot are directly mixed. By regulating and controlling the type and the proportion of the rare earth upper conversion luminous material and the quantum dot, the composite material can realize the efficient upper conversion luminous effect in the full visible multispectral section. The composite material overcomes the limitation of continuous adjusting incapability of the upper conversion spectrum due to the rare earth ion discrete energy level of the conventional rare earth upper conversion luminescence and solves the problem of low upper conversion efficiency of the quantumdot through multiphoton absorption. The fine regulation and control is realized on the upper conversion spectrum and fluorescence service life of the material; the composite material can be applied tothe fields of biological detection, bioimaging, laser, optical coding, anti-counterfeiting, three-dimensional display, photoelectric detector, solar spectral conversion and the like.

Description

Technical field

[0001] The invention belongs to the technical field of luminescent materials, and specifically relates to a rare earth / quantum dot composite up-conversion luminescent material and a preparation method and application thereof. Background technique

[0002] Up-conversion luminescence is a nonlinear optical process that can convert two or more low-energy photons into one high-energy photon. Compared with traditional down-conversion luminescence excited by ultraviolet or visible light, up-conversion luminescence is generally excited by near-infrared laser, so it has high light penetration depth, high spatial resolution, no background fluorescence interference, and less damage to samples. advantage. These advantages make up-conversion luminescent materials have broad application prospects in high-sensitive biological detection, super-resolution biological imaging, lasers, optical coding, multiple anti-counterfeiting, three-dimensional display, solar spectrum conversio...

Images