Method and equipment for controlling growth of quantum dots

Abstract

The embodiment of the invention provides a method and an equipment for controlling the growth of quantum dots, belonging to the field of quantum dot material preparation. The control method comprises the following steps of: arranging a substrate used for growing the quantum dots in a solution in which the quantum dot material is dissolved; arranging at least two lines of intersectant ultrasonic at the same horizontal above the substrate so as to form an ultrasonic standing wave; leading the node column formed by the ultrasonic standing wave to point at the substrate; leading the quantum dot material in the solution to deposit and grow the quantum dots on the substrate by the node columns formed by the ultrasonic standing wave; and adjusting the frequency or wavelength of the ultrasonic in the solution so as to adjust the growth position of the quantum dots on the substrate. The control method has the advantages of simple operation, realizing the controllable positioning growth of the quantum dot, having exact positioning, cheap equipment, and the like, is capable of preparing the material with the specified position growing the quantum dots and is capable of controlling the positions of the quantum dots growing on the substrate by controlling the wavelength and the frequency of the ultrasonic.

Description

technical field [0001] The invention relates to the field of preparation of quantum dot materials, in particular to a quantum dot growth control method and control equipment. Background technique [0002] Confining electrons in a nanoscale structure forms a structure with three dimensions below 100nm, which looks like a very small point, called a quantum dot. In these structures, since the spatial domain of electrons is close to the De Broglie wavelength, its matter wave properties change drastically, and the electrical and optical properties are qualitatively different from those of bulk materials. Quantum dots have extremely broad application prospects in nonlinear optics, magnetic media, biology, medicine, and functional materials. [0003] The application prospects of quantum dot materials are very broad, and can be used in large-scale integrated circuits, electronic components, flat panel displays, information recording and storage, MEMS, sensors, solar cells and other...

AI Technical Summary

Problems solved by technology

[0004] During the existing preparation of quantum dot materials, planar etching is used to prepare quantum dot materials (electron beam, ion beam and photolithography), strain self-organized growth quantum dot technology and other chemical and physical method preparation techniques, but due to quantum dot growth It has the characteristics of randomness and too small volume. Therefore, the existing technology cannot accurately control the positioning of quantum dots when the substrate material grows, so the existing process can only control the growth of quantum dots on a large-area substrate. However, it is impossible to control the specific position of quantum dot growth, so the quantum dot materials obtained after preparation cannot meet the requirements of some specific applications in terms of performance and application.

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