Method for manufacturing crystalline silicon high-efficiency solar cell

Abstract

The invention discloses a method for manufacturing a crystalline silicon high-efficiency solar cell, which comprises: preparing a textured surface structure on the surface of a crystalline silicon substrate; forming a PN junction structure on the crystalline silicon substrate by a diffusion method; forming a silicon nanocrystal structure on the surface by using thin film deposition technology and heat treatment; depositing a silicon nitride antireflective film on the surface of the substrate by using a plasma-reinforced chemical vapor deposition method; making an anode and a cathode by screen printing; and alloying to make the surface silicon nanocrystal modulated solar cell. In the invention, the PN junction crystalline silicon solar cell prepared by a process means used in a mass production is used, silicon nanocrystals are formed on the surface of the PN junction crystalline silicon solar cell, and under the modulating action of the silicon nanocrystals, the crystalline silicon cell can utilize the solar wavelength more effectively to improve the efficiency of the crystalline silicon cell. The method is compatible with the convenient mature large-scale production technology, has the characteristics of simple production process, easy industrialization and the like and can effectively reduce cost and acquire the high-efficiency crystalline silicon solar cell.

Description

technical field [0001] The invention relates to a method for manufacturing crystalline silicon high-efficiency solar cells. The quantum confinement effect of surface silicon nanocrystals is used to modulate light with photon energy greater than the forbidden band width (1.1eV) of bulk silicon, especially short-wavelength light, so that it is crystallized Silicon cells are fully absorbed and utilized to achieve the purpose of improving conversion efficiency and reducing costs. Background technique [0002] In recent years, energy shortages such as rising oil prices and environmental pollution such as global warming have become increasingly serious, and people's demand for clean and renewable energy is unprecedentedly urgent. Solar energy is inexhaustible and is expected to replace traditional energy sources. As an important form of solar energy, solar cells have attracted much attention. [0003] Since Chapin et al first proposed the application of silicon-based PN junction ...

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Problems solved by technology

[0004] At present, the main problems faced by crystalline silicon cells are: the conversion efficiency is not very high (mass production can achieve an average of 17%), the price is expensive, etc.

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