A kind of preparation method of polymer solar cell based on Lorentz force

Abstract

The present invention proposes a method for preparing a polymer solar cell based on Lorentz force. The preparation steps are as follows: sputtering an indium tin oxide anode on a glass substrate, spin-coating a hole transport layer; growing a layer of 40-60 in a strong magnetic field nm NdFeB magnetic material, photolithography to form a strip pattern, the direction of the strip is perpendicular to the direction of the magnetic field; drop coating or printing the polymer photosensitive layer material mixed with donor and acceptor between the strip patterns to form a strip magnetic The Lorentz force photosensitive layer in which the material and the strip-shaped photosensitive material are grown alternately; the electron transport layer is spin-coated, and the aluminum cathode is evaporated. The alternate growth mode of strip-shaped magnetic materials and strip-shaped photosensitive materials is established, and the direction of the magnetic field formed between each two strip-shaped magnetic materials is consistent to enhance the movement of electrons to the cathode direction and the movement of holes to the anode direction. It is conducive to the transmission of electrons and holes after excitons are separated to the transport layer, reducing the recombination of excitons, increasing the thickness of the photosensitive layer, and improving the photoelectric conversion efficiency of polymer solar cells.

Description

technical field [0001] The invention relates to a method for preparing a polymer solar cell based on Lorentz force, and belongs to the technical field of organic solar cells. Background technique [0002] With the increasing depletion of non-renewable energy sources and the increasing demand for energy, solar cells have become a hot spot in current research. So far, the conversion efficiency of inorganic silicon-based solar cells has reached 24%, which is the mainstream of the market. However, it faces shortcomings such as high manufacturing cost, not easy to carry, harsh production conditions, and difficult to process, which provides challenges for follow-up research. Solar cells using organic materials, including sensitized dye solar cells, polymer solar cells, and small molecule solar cells, currently have a conversion efficiency of about 9%. Polymer solar cells can be fabricated in a large area by printing methods with low cost, and are one of the most promising organi...

AI Technical Summary

Problems solved by technology

However, the current photoelectric conversion efficiency is low, and the main reason limiting the efficiency of polymer solar cells is that the excitons generated by the photosensitive layer are not easy to separate, and the separated holes and electrons are easy to recombine, and the transmission distance is only about 10 nm, which limits the photosensitive layer. layer thickness

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