The excellent contact quality of the laser contact openings is proven by the low series resistance of 0.1 Ω cm 2 on the solar cell with a contact area of only 3%. 1. Introduction Passivating contacts enable the highest power conversion efficiencies of up to 26.7% for single junction silicon solar cells.
26.1%-efficient p -type world record back-contact silicon solar cells with laser contact openings. Scanning electron microscopy analysis of laser contact openings. We demonstrate damage-free laser contact openings in silicon oxide layers on polycrystalline silicon on oxide (POLO) passivating contacts.
FAST AND PRECISE LASER PROCESSING OF SOLAR CELLSLaser processes are an impor ant part of the production of modern solar cells. In PERC solar cells, for example, the laser enables backside contacting of the cell by laser contact openi
The theory of solar cells explains the process by which light energy in photons is converted into electric current when the photons strike a suitable semiconductor device.
Patterning techniques arrange contacts on the shaded side of the silicon wafer, offering benefits for light incidence as well. However, the patterning process complicates production and causes power loss. Here we employ lasers to streamline back contact solar cell fabrication and enhance power conversion efficiency.
Back contact silicon solar cells, valued for their aesthetic appeal by removing grid lines on the sunny side, find applications in buildings, vehicles and aircrafts, enabling self-power generation without compromising appearance 1-3.
OverviewWorking explanationPhotogeneration of charge carriersThe p–n junctionCharge carrier separationConnection to an external loadEquivalent circuit of a solar cellSee also
The theory of solar cells explains the process by which light energy in photons is converted into electric current when the photons strike a suitable semiconductor device. The theoretical studies are of practical use because they predict the fundamental limits of a solar cell, and give guidance on the phenomena that contribute to losses and solar cell efficiency.