A Method of Using Magnetic Field to Regulate the Ordered Growth of Organic Thin Film Molecules

Abstract

A method for using a magnetic field to regulate the orderly growth of organic film molecules disclosed in the present invention is specifically implemented according to the following steps: Step 1. Select a photosensitizer and an organic solvent according to the organic material, and dissolve the organic material and the photosensitizer in the organic solvent to form Uniform mixed solution; step 2, select the excitation light source and magnetic field according to the photosensitizer in step 1; step 3, first pour the mixed solution obtained in step 1 into the solution tank, and then clamp the pre-cleaned substrate in the On the jig of the pulling device, the parameters of the excitation light source and the magnetic field are set, and under the action of the excitation light source and the magnetic field, the organic film molecules are grown by the solution pulling method. During the growth process of organic thin films, by adding photosensitizers in the growth solution, exciting light sources, applying magnetic fields and other technological conditions, the degree of ordering of organic thin film molecules is improved, and the quality and photoelectric characteristics of the thin films are improved.

Description

technical field [0001] The invention belongs to the technical field of organic semiconductor thin films, and relates to a method for regulating the orderly growth of organic thin film molecules by using a magnetic field. Background technique [0002] Organic semiconductor thin films are generally molecularly highly disordered thin films. The disorder of molecules leads to the decrease of molecular arrangement density in the film, the increase of the distance between adjacent molecules, the generation of a large number of defect traps, the reduction of orbital overlap, the formation of potential barriers between molecules, and the discontinuity of energy bands. These problems will lead to a decrease in the diffusion length of excitons by 10nm and a decrease in free carrier mobility10 -7 cm 2 / V·S~10 -2 cm 2 / V·S, thereby reducing the transport efficiency. In addition, due to the increase of heterojunction interface states formed at the same time, the exciton recombinatio...

AI Technical Summary

Problems solved by technology

The disorder of the molecules leads to the reduction of molecular arrangement density in the film, the increase of the distance between adjacent molecules, the generation of a large number of defect traps, the reduction of orbital overlap, the formation of potential barriers between molecules, and the discontinuity of energy bands.

These problems will lead to a decrease in the diffusion length of excitons by 10nm and a decrease in free carrier mobility10 -7 cm 2 / V·S~10 -2 cm 2 / V·S, thus reducing the transport efficiency

In addition, due to the increase of heterojunction interface states formed at the same time, the exciton recombination rate increases and the separation efficiency decreases, which will eventually affect the electrical characteristics of optoelectronic devices.

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