Preparation method of InP quantum point

Abstract

The invention discloses an InP quantum point preparing method, comprising the steps of: (1) mixing InCl3 with trioctylphosphine oxide, and preserving heat at 90-110DEG C to prepare a solution whose In content is 0.1-0.3mol / L; (2) raising temperature to 130-180DEG C, and charging argon gas; (3) injecting P(Si(CH3)3)3 into InCl3-TOPO compound in the molar ratio of 1 to 1-1 to 2; (4) when the solution color turns into transparent red or orange, raising temperature to 260-270DEG C and preserving heat; (5) lowering temperature to 90-110DEG C and injecting dodecyl amine, decyl amine or mercaptan; (6) dissolving reacting mixture in nonpolar solvent to form transparent colloidal solution, then adding in polar solution until the colloidal solution is muddy, and centrifugally separating and obtaining deposits and supernatant; and (7) centrifugally separating the supernatant, where the above steps (1)-(5) are performed. And it has characters of high crystallizability, uniform size, and good optical properties.

Description

technical field [0001] The invention belongs to the technical field of preparation of compound semiconductor nanometer materials, and in particular relates to a preparation method of InP quantum dots. Background technique [0002] When the size of semiconductor material particles is equivalent to the exciton Bohr radius or the De Broglie wavelength of electrons (<100nm), such particles can be called quantum dots (Quantum dots, QDs) or nanocrystals (Nanocrystals), which The scale is between macroscopic solids and microscopic atoms and molecules, with a typical size of 1-10nm, containing dozens to tens of thousands of atoms. At this time, quantum dots will show quantum confinement effects, and the electronic structure will also change. The most notable is The forbidden band widens, and the electronic density of states presents a discrete "quantized" energy level structure similar to atoms. [0003] When the particle size enters the nanometer level, the movement of carriers...

AI Technical Summary

Problems solved by technology

In this field, Nozik and Micic have made significant contributions. They have synthesized some III-V colloidal quantum dots, but the quality is poor compared with II-VI quantum dots. The best results are limited to InP colloidal quantum dots. Moreover, the preparation conditions and operation requirements are strict

These will seriously affect the research on III-V semiconductor nanomaterials and restrict the development of semiconductor devices

Images