Composite material, preparation method thereof and quantum dot light-emitting diode

Abstract

The invention discloses a composite material, a preparation method thereof and a quantum dot light-emitting diode. The composite material comprises carbon quantum dots, organic molecule connectors and metal nano particles, and the surfaces of the carbon quantum dots are combined with hydroxyl groups; and one ends of the organic molecule connectors are combined with hydroxyl groups of the carbon quantum dots through carboxyl groups, and the other ends of the organic molecule connectors are combined with the metal nano particles through functional groups with a metal bonding property. On the premise of keeping the excellent performance of the carbon quantum dots, the luminescence performance of the carbon quantum dots can be enhanced by utilizing surface plasma resonance formed on the surfaces of the carbon quantum dots by the metal nano particles. The carbon quantum dots have very excellent conductivity by utilizing the good conductivity of the metal nano particles. The composite material disclosed by the invention is excellent in film-forming property, capable of effectively inhibiting the phenomenon of carbon quantum dot solid-state fluorescence quenching, good in bio-compatibility, low in preparation cost and easy to prepare.

Description

technical field [0001] The invention relates to the field of quantum dot light emitting devices, in particular to a composite material, a preparation method thereof and a quantum dot light emitting diode. Background technique [0002] Quantum dots (QDs) have significant advantages in the field of luminescent materials due to their own superior photoelectric properties. In order to explore the potential application of quantum dot films in solid-state fluorescence and display, the preparation of ultra-thin quantum dot films with excellent optical properties has become a research hotspot for many researchers. [0003] Since the particle size of quantum dots is generally between 1 and 10 nm, it has a very large specific surface area, and the increase in the number of atoms on the surface leads to insufficient coordination of surface atoms, unsaturated bonds and dangling bonds (that is, unsaturated bonds on the surface of the crystal lattice). Paired electrons) increase, making ...

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a composite material and its preparation method and quantum dot light-emitting diodes, aiming to solve the problem of low brightness of the existing devices based on carbon quantum dots and easy quenching in solid state to a certain extent. Extinction, and poor film-forming ability, etc.

Images