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.