Quantum dot ligand structure, luminescent device, preparation method and display device

Abstract

The embodiment of the invention provides a quantum dot ligand structure, a luminescent device, a preparation method and a display device. The quantum dot ligand structure is an azobenzene compound; each benzene ring of the azobenzene compound has at least one group, and coordinate bonds can be formed between the groups and quantum dots. According to the quantum dot ligand structure provided by the embodiment of the invention, the quantum dot ligand structure is the azobenzene compound, each benzene ring of the azobenzene compound has at least one group, the groups on the benzene rings of the azobenzene compound can be connected with quantum dots through the coordinate bonds, the quantum dot ligand structure can be connected with the quantum dots through the coordinate bonds, and therefore, a net-shaped or chain-shaped structure can be formed easily, the problem that surface atom coordination of the quantum dots is insufficient is avoided, unsaturated bonds are reduced, and surface defects of the quantum dots are reduced; the azobenzene compound has the carrier transmission characteristic, the transmission rate of carriers among the quantum dots is increased, the luminous efficiency of the quantum dots is improved, and the service life of the luminescent device is prolonged.

Description

technical field [0001] The invention relates to the display field, in particular to a quantum dot ligand structure, a light-emitting device, a preparation method, and a display device. Background technique [0002] Because quantum dots have the characteristics of adjustable emission spectrum, narrow emission spectrum and good photostability, quantum dot light-emitting diodes have become a potential emerging display technology. Due to the high surface atom ratio of quantum dots, most of the atoms are located on the surface of quantum dots, resulting in insufficient coordination of surface atoms, increasing unsaturated bonds, and existing in the form of defect states, which have the ability to capture electrons or holes , causing non-radiative transitions of exciton recombination, reducing the luminous efficiency of quantum dots, resulting in a reduction in the lifetime of light-emitting devices. Contents of the invention [0003] In view of this, the present invention prov...

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Problems solved by technology

[0003] In view of this, the present invention provides a quantum dot ligand structure, a light-emitting device and a preparation method, and a display device, which are used to solve the problems of insufficient coordination of surface atoms of quantum dots and defects on the surface of quantum dots, which lead to a decrease in the luminous efficiency of quantum dots. question

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