Quantum dot LED and preparation method

Abstract

The invention provides a quantum dot LED and a preparation method, and the quantum dot LED comprises a pair of electrodes arranged side by side at intervals; a flip-chip LED chip which is disposed onthe electrode and electrically connected with the electrodes; a quantum dot interlayer disposed on the flip-chip LED chip; a packaging layer which covers the electrodes, the flip-chip LED chip and thequantum dot interlayer; and a white glue layer surrounding the packaging layer. Through the setting of the quantum dot interlayer, the LED can prevent the invasion of the quantum dot layer and the LED chip by the external water and oxygen, provides an environment for isolating water and oxygen for the quantum dots, and facilitates the improvement of the luminous efficiency and the prolonging of the service life of the quantum dots. The LED is provided with the organic layer of the structure, and improves the light-emitting efficiency. The inorganic packaging layer is formed by atomic layer deposition, and the LED can be flat in surface and uniform in thickness. A film cannot crack.

Description

technical field [0001] The invention relates to the technical field of screen display, in particular to a quantum dot LED and a preparation method. Background technique [0002] Quantum Dot (Quantum Dot, QD) is a semiconductor nanostructure that binds conduction band electrons, valence band holes and excitons in three spatial directions, also known as nanocrystals. Nanoparticles composed of III-V elements. The particle size of quantum dots is generally between 1 and 10 nm. Since electrons and holes are quantum-confined, the continuous energy band structure becomes a discrete energy level structure with molecular characteristics, and can emit fluorescence after being excited. CSP (Chip Scale Package) LED, as a kind of LED without bracket, has become an important development direction of LED because of its simple manufacturing process, good heat dissipation, and small light-emitting surface. [0003] figure 1 is the absorption spectrum diagram of red light quantum dots and ...

AI Technical Summary

Problems solved by technology

[0004] However, due to the serious temperature quenching of quantum dots, the temperature rises and the luminous efficiency decreases.

In addition, if the quantum dots are exposed to the water and oxygen environment, the fluorescence efficiency will decrease rapidly and irreversibly. Therefore, at present, the quantum dots need to be isolated from the water and oxygen environment, isolated from high temperature or have a better heat dissipation environment.

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