The Principle And Structure Of Double-sided PERC Solar Panels
Bifacial PERC (passivated emitter rear cell) solar panels, as the name suggests, are solar panels designed to absorb light from both sides. This innovative technology has significantly increased efficiency over the past few years and is proving to be an excellent solution for the solar industry.
PERC solar panels have gained attention for their ability to increase the efficiency of photovoltaic (PV) cells. PERC technology has a passivation layer on the back of the cell that prevents electrons from recombining with holes. This technology has become popular because it works efficiently in low-light conditions while reducing electrical resistance.
The manufacturing process of P-type PERC bifacial solar cells includes: texturing, diffusion, etching, annealing, back passivation layer deposition, PECVD back coating, front PECVD coating, screen printing, and sintering.
Bifacial PERC Technology builds on the success of PERC technology with an innovative design that maximizes every bit of available light. Unlike traditional solar panels that only absorb light from one side, bifacial PERC panels can absorb light from both sides, doubling the amount of sunlight captured and increasing power output.
The structure of a PERC solar cell consists of multiple layers of semiconductor doped with metal (usually silicon). The backside of a PERC solar cell is an ultra-thin layer of aluminum oxide that acts as a passivation layer. Passivation layers help prevent defects that occur when layers come into contact with each other. This layer helps reduce the likelihood of electrons and holes recombination, allowing for more efficient electron flow.
The front side of PERC cells has a textured surface, often created using chemical etching techniques, that helps scatter light and reduce reflections. The back of the battery has a passivation layer that reduces the possibility of contact with impurities in the environment, thus protecting the battery from degradation.
Bifacial PERC panels employ a unique mechanism to increase their efficiency. The back of the solar panel is placed parallel to the reflective surface to absorb light from the back of the panel and increase the power output of the cell. The bottom layer of the panel also has a reflective coating that helps increase reflected light from the ground.
The main mechanism to improve the performance of bifacial PERC panels is to reduce light loss. In traditional solar panels, light falling on the inactive side is lost. However, bifacial PERC panels change this by shifting the backside area from passive components to active cells in the circuit. This changes the dynamics of the circuit and both the front and rear cells will work actively, which will maximize the final output.
The efficiency of bifacial PERC panels has led to their rapid adoption in solar installations in recent years. In addition to being more efficient, they come in a variety of sizes, making them ideal for both small and large installations. These panels can be used in small applications, such as powering boats or gadgets, or in larger facilities, such as solar parks or wind farms.
In summary, bifacial PERC solar panels are a game-changing technology for the solar industry. Its unique mechanism improves the performance of traditional solar panels, and its efficiency has led to its rapid adoption by the solar industry in recent years. They are ideal for both small and large applications and have proven to be more efficient, long-lasting and environmentally friendly.