Solar cell and preparation method thereof, battery piece based on solar cell and photovoltaic module

Abstract

The present invention discloses a solar cell and preparation method thereof, a battery piece based on a solar cell and a photovoltaic module. Transmitting electrodes on a silicon substrate of a solarcell are a plurality of independent transmitting electrodes, and preset distances are arranged between edges of the adjacent transmitting electrodes; the positive electrode patterns and the negative electrode patterns of a dye-sensitized solar cell are a plurality of independent electrode patterns, and each transmitting electrode corresponds to one independent positive electrode pattern and one independent negative electrode pattern up and down. When the solar cell is sliced, the portion between the edges of the adjacent transmitting electrodes perform cutting for the solar cell to prevent thesolar cell from damaging the pn junction in the slicing process to cause performance degradation of the solar cell and avoid edge leakage and short circuit because the electrode residual slurry afterslicing and the metal powder in the slicing process pollute a notch; and moreover, the notch stress is small to reduce the battery piece fragmenting or subfissure caused by stress releasing and improve the slicing yield and module reliability.

Description

technical field [0001] The invention belongs to the technical field of crystalline silicon solar cells, and in particular relates to a solar cell, a preparation method thereof, and a solar cell and a photovoltaic module based thereon. Background technique [0002] A solar cell is a photoelectric device that uses the photovoltaic effect to directly convert light energy into electrical energy. According to the matrix material used to manufacture solar cells, it can generally be divided into silicon-based solar cells, compound solar cells, thin-film solar cells, organic solar cells, nano-solar cells, and the like. At present, silicon-based solar cell technology is the most mature and has been commercially produced on a large scale, accounting for more than 85% of the solar cell market. [0003] A general crystalline silicon solar cell consists of a silicon substrate, an emitter, a light-trapping structure on the emitter surface, a passivation anti-reflection structure on the e...

AI Technical Summary

Problems solved by technology

However, the sliced ​​batteries used in prior art 1 and prior art 2 are all complete single battery units, that is, the sliced ​​batteries used in prior art 1 and prior art 2 contain only one pn junction

In the cutting process, the original complete pn junction is cut into several pn junction units, and the pn junction is the core structure of the solar cell, once it is destroyed, it will inevitably cause the attenuation of device performance, so prior art one and prior art Second, it will still cause the power output of the sliced ​​battery to attenuate, and the yield rate is low

Images