Method of improving photoelectric properties of heterojunction solar cell

Abstract

The invention discloses a method of improving the photoelectric properties of a heterojunction solar cell. A covering layer has the functions of surface antireflection, carrier conduction and electrode selective deposition mask, and the method comprises the following steps of: (a) preparing a heterojunction solar cell substrate, (b) depositing a metal seed layer gate, (c) depositing a covering layer in the non-gate region, (d) drying the covering layer, (e) electrochemically depositing a metal electrode in the gate region, (f) post-processing a covering layer, and (g) drying the cover layer. According to the method disclosed in the invention, the complexity of an electrochemical deposition metal electrode process can be obviously reduced, the polymer covering layer is used, the photoelectric property is obviously improved after treatment, the polymer covering layer can also be used as a transparent conductive film of the heterojunction solar cell, and, according to the method, the process of removing the mask by an electrochemical deposition electrode of a conventional heterojunction solar cell is avoided, the transparent conductive film can be used less or not used, the conversionefficiency of the heterojunction solar cell is improved, the production cost is reduced, and the method has remarkable advantages in industrial production.

Description

technical field [0001] The invention belongs to the technical field of heterojunction solar cells, and relates to a method for improving the photoelectric performance of heterojunction solar cells. Background technique [0002] The principle of solar cells is based on the photovoltaic effect, a device that directly converts solar energy into electrical energy, and is also an important part of the practical application of solar energy. At present, crystalline silicon solar cells have become the mainstream of the photovoltaic industry. More than 80% of the solar cells on the market are crystalline silicon solar cells. However, the cost of producing monocrystalline silicon is still relatively high, the process is complicated, the overall conversion efficiency is not high, and the high temperature performance Poor, light-induced attenuation, etc. restrict its further development. [0003] Heterojunction solar cells deposit intrinsic amorphous silicon films on both sides of n-ty...

AI Technical Summary

Problems solved by technology

However, the above processes all require the step of removing the mask in the later stage, and the process is complicated

Images