Heterojunction solar cells and methods of making the same

Abstract

Provided are a heterojunction solar battery and a preparation method therefor. The heterojunction solar battery comprises a TCO (50), and a gate electrode (60) formed on the TCO (50), wherein the gate electrode (60) partially extends into the TCO (50). The preparation method for a heterojunction solar battery comprises: providing an underlayment (10), and forming a TCO (50) above the underlayment (10); and forming a gate electrode (60) on the TCO (50), wherein in the step of forming the gate electrode (60) on the TCO (50), the gate electrode (60) partially extends into the TCO (50). By partially extending the gate electrode (60) into the inside of the TCO (50), the contact area between the gate electrode (60) and the TCO (50) is increased, and the contact resistance is reduced. Meanwhile, by the lateral contact between the gate electrode (60) and the TCO (50), the carrier transport is improved to a certain extent, and thus the filling factor of the solar battery is increased and the energy conversion efficiency of the battery is improved.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a heterojunction solar cell and a preparation method thereof. Background technique [0002] With the development of technology, the photovoltaic industry has gradually entered people's lives, especially solar cells have been widely promoted and applied. Solar cells can be divided into homojunction solar cells and heterojunction solar cells according to their matrix materials. The homojunction solar cell is a solar cell made of crystalline silicon as the basic material, while the heterojunction solar cell is an amorphous silicon / crystalline silicon heterogeneous solar cell formed by preparing amorphous and nanocrystalline thin films on a crystalline silicon substrate by a thin film process. A solar cell with a mass junction as the basic structure. Heterojunction solar cells have become a very important technology in the field of solar cells due to their advantages of high efficiency, ...

AI Technical Summary

Problems solved by technology

[0007] The above method has been developed to a certain extent with the advancement of technology, and it is limited to the development of the slurry itself. Its improvement space mainly depends on the slurry supplier, and it cannot be further deepened from the perspective of battery research.

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