Technology
perc solar cells
we enable high-efficiency solar cell manufaturing
The Passivated Emitter and Rear Contact (PERC) solar technology is highly efficient and improved type of PV technology that uses Crystalline Silicon (c-Si) and fixes some inconveniences. Bifacial silicon solar cell is a special kind of crystal silicon solar cell structure, which can receive sunlight and produce electricity power from both front and back sides. These cells are designed with special structure and finger contact, so they can absorb more sunlight and produce much power from both sides.
Advantages:
Higher Generation Process Of The Modules
The M10 cell P-type bificial half cut solar cell could provide up to 30% of the gain in the generation process of the modules, as for the half cut cell technology has a higher conversion efficiency than the full piece.
Lower Rated Operating Temperature
Compared with the full cell modules, the temperature of the mono perc cell module is 2-3 degrees lower, and the hot spot temperature is 10-20 degrees lower.
Lower Shadow Shielding Loss
Solar cell M10 module has a lower shadow shielding loss.
Frequently asked questions
PERC stands for "Passivated Emitter and Rear Contact". Compared to standard solar cells, PERC cells are provided with a dielectric passivation layer on the cell rear side, which usually consists of aluminum oxide (AlOx). This layer plays a significant role for the increase in conversion efficiency:
Reduction of recombination losses
Recombination blocks the free flow of electrons through the cell and thus reduces cell efficiency. Passivation makes the electron flow more uniform and consistent and ensures that more electrical current is generated.
Maximization of light absorption
The rear side passivation layer reflects unabsorbed solar radiation partially back into the solar cell. This again opens the possibility of light absorption and conversion into electrical energy.
Reduction of heat concentration within the cell
Long wavelength light in the range of more than 1,180 nm is not absorbed in the silicon and causes heat generation in the metallization on the back surface. The temperature increase has a negative effect on cell efficiency. This effect can be reduced with backside passivation: the long wavelength light is reflected before it hits the aluminum metallization and exits through the cell. This keeps the PERC solar cell at a lower operating temperature, which has a positive effect on its energy yield.
