Electroluminescence device and its light-emitting layer and application

Abstract

The present invention relates to a light-emitting layer of an electroluminescent device, comprising at least one nanocrystalline semiconductor material and at least one luminescent material of a lanthanide rare earth metal Tb complex; wherein, the luminescent material of the lanthanide rare earth metal Tb complex The emission peak wavelength is shorter than that of the nanocrystalline semiconductor material. The invention innovatively uses the luminescent material of the lanthanide rare earth metal Tb complex to cooperate with the nano-crystal semiconductor material, which facilitates the transfer of energy from the Tb complex luminescent material to the nano-crystal semiconductor material. At the same time, the rare earth element Tb in the luminescent material of the lanthanide rare earth metal Tb complex is a heavy metal, which has a strong spin-orbit coupling effect, and can efficiently utilize the singlet and triplet energy in the electroluminescent device at the same time, thereby Effectively improve the luminous efficiency of electroluminescent devices.

Description

technical field [0001] The invention relates to the technical field of light-emitting devices, in particular to an electroluminescence device, a light-emitting layer and applications thereof. Background technique [0002] Nanocrystalline semiconductor materials, also known as nanocrystals, are composed of a limited number of atoms, and at least two dimensions are on the order of nanometers. The two-dimensional space is restricted, and the quantum confinement effect is particularly significant. When excited by light or electricity, nanocrystalline semiconductor materials will emit a spectrum with a very narrow half-peak width (usually less than 40nm), and the luminous color is mainly determined by the particle size. Stability and other characteristics. [0003] Due to the advantages of high luminous efficiency, controllable luminous color, and high color purity, nanocrystalline semiconductor materials have great application potential in next-generation display technologies....

AI Technical Summary

Problems solved by technology

[0006] Through the improvement of nanocrystalline semiconductor materials and the continuous optimization of QLED device structure, the performance of existing QLED devices has been greatly improved, but its luminous efficiency is still far from the requirements of industrial production.

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