Lorentz force based novel polymer solar cell preparation method

Abstract

The invention provides a lorentz force based novel polymer solar cell preparation method. The preparation method comprises the following steps of sputtering an indium-tin oxide positive electrode (2) on a glass substrate (1), and performing spin-coating on a hole transport layer (3); enabling a layer of 40-60nm neodymium-iron-boron magnetic materials (4-1) to be grown in a strong magnetic field, and performing photoetching to form strip-shaped patterns (4-1), wherein the strip-shaped direction is perpendicular to the magnetic field direction; enabling polymer light-sensitive layer materials (4-2) which are formed by co-mixing of a donor and a receptor to be dispensed or printed between the strip-shaped patterns (4-1) which are formed by photoetching, and forming a lorentz force light-sensitive layer (4) based on alternative growth of the magnetic materials and the strip-shaped light-sensitive materials; and performing spin-coating on an electron transport layer (5) and evaporating an aluminum negative electrode (6). According to the preparation method, the mutual alternative growth mode of the magnetic materials and the strip-shaped light-sensitive materials is established; the directions of the magnetic fields formed by every two strip-shaped magnetic materials are consistent, so that the movement of electrons to the direction of the negative electrode, and the movement of holes to the direction of the positive electrode are reinforced; therefore, the transport of electrons and holes to the transport layer after exciton dissociation can be promoted; the exciton recombination is reduced; the thickness of the light-sensitive layer is increased; and the improvement of the photoelectric conversion efficiency of the polymer solar cell is facilitated.

Description

technical field [0001] The invention relates to a method for preparing a novel 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 ...

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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