Back contact solar battery and preparing method thereof

Abstract

The invention provides a back contact solar battery and a preparing method of the back contact solar battery. The preparing method of the back contact solar battery includes the steps of providing a first mould slide boat and a second mould slide boat, wherein the first mould slide boat comprises first film growing areas and first shielding areas which are distributed alternatively, and the second mould slide boat comprises second film growing areas and second shielding areas which are distributed alternatively, the first film growing areas correspond to the second shielding areas, and the second film growing areas correspond to the first shielding areas. First doped amorphous silicon indication areas and second doped amorphous silicon indication areas are formed on the surfaces, with passivated layers, of monocrystalline silicon substrates through the mould slide boats, wherein the first doped amorphous silicon indication areas and the second doped amorphous silicon indication areas are opposite in doping type and crossed in distribution. By means of the preparing method, a fork structure of a back field of the back contact solar battery is achieved simply at low cost, additional manufacturing process of forming the passivated layers is needless, and the preparing method of the back contact solar battery is simplified.

Description

technical field [0001] The invention belongs to the field of solar cells, in particular to a back-contact solar cell and a manufacturing method thereof. Background technique [0002] Solar power generation technology is an important field of new energy development. In order to increase unit power generation, it is very important to use solar cells with high energy conversion efficiency. The main electrical parameters that determine the energy conversion efficiency of solar cells include short-circuit current, open-circuit voltage, and fill factor. Among them, the short-circuit current corresponds to the optical shading loss of the solar cell, the open-circuit voltage represents the recombination loss of the solar cell, and the fill factor represents the electrical properties of the solar cell. loss. That is, if one wants to improve the energy conversion efficiency of solar cells, breakthroughs can be found in three aspects of reducing optical shading loss, recombination los...

AI Technical Summary

Problems solved by technology

[0004] However, the manufacturing process of traditional back-contact solar cells is complicated, the cost is high, and multiple high-temperature operations are required in the manufacturing process, which increases the pollution path and reduces the bulk life of the silicon substrate.

Images