Monocrystalline silicon solar cell and production method thereof

Abstract

The invention relates to a monocrystalline silicon solar cell and a production method thereof. The production method includes: forming a texturizing layer on the upper surface of a P-type monocrystalline silicon wafer; forming an N-type silicon layer on the upper surface of the P-type monocrystalline silicon wafer; depositing a silicon nitride passivation layer on the N-type silicon layer, and etching the silicon nitride passivation layer to forming an opening in an area for forming an upper electrode so as to expose the N-type silicon layer; coating the upper surface of the P-type monocrystalline silicon wafer with a solution containing acetyl alkoxy aluminum diisopropoxide in a spin manner, and annealing; sequentially coating the lower surface of the P-type monocrystalline silicon waferwith a solution containing a tungsten sulfide two-dimensional nano material and a solution containing a titanium sulfide two-dimensional nano material in a spin manner, and annealing to form a composite interface layer; forming the upper electrode on the upper surface of the P-type monocrystalline silicon wafer, and forming a lower electrode on the lower surface of the P-type monocrystalline silicon wafer. The monocrystalline silicon solar cell produced by the method is excellent in photoelectric conversion efficiency.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a monocrystalline silicon solar cell and a manufacturing method thereof. Background technique [0002] With the high development of industry and the continuous growth of population, the demand for energy also increases sharply, among which coal and oil are the most important energy materials. However, the total reserves of coal and oil on the earth are limited and non-renewable, so the world is facing severe energy problems. At the same time, the use of coal and oil will also cause serious environmental pollution, causing a huge disaster to our earth. Only the large-scale use of renewable energy to replace coal and oil can promote the sustainable development of human society. Solar energy comes from the energy contained in the nuclear fusion inside the sun and can explode and radiate outward. Compared with traditional energy sources, solar energy is inexhaustible and inexha...

AI Technical Summary

Problems solved by technology

At present, solar cells are usually used to convert light energy into electrical energy. In the preparation process of existing P-type monocrystalline silicon solar cells, the process of etching openings on the passivation layer often causes damage to the N-type silicon layer, which in turn affects the P-type silicon solar cells. Photoelectric conversion efficiency of monocrystalline silicon solar cells

Images