![]() The advantages of ABC cells include improved photo-generation of carriers due to the elimination of the optical front-metal grid shading and improved blue response since heavy front-surface doping to reduce the front contact resistance is not required due to the shifting of the front contacts to the rear of the cell. ABC cells have several advantages over conventional silicon wafer solar cells, which have contacts on both surfaces, whereby the front contact is a metal grid consisting of parallel fingers and several busbars connecting the metal fingers. ![]() The cells are sometimes referred to as interdigitated back contact (IBC) cells, because of the interpenetrating contacts (metal fingers) of opposite polarity on the rear of the cell. BACKGROUNDĪll-back-contact (ABC) silicon wafer solar cells have the potential of achieving a high energy conversion efficiency with a cost-effective and industrially feasible fabrication process. ![]() Robust PV Degradation Methodology and Application.The present invention relates broadly to a method of fabricating an all-back-contact (ABC) solar cell, and to an ABC solar cell. 1.64 m²), 8% more energy per watt (based on PVSim runs for avg US climate), 0.5%/yr slower degradation rate (Jordan, et. SunPower 400 W, 22.6% efficient, compared to a Conventional Panel on same-sized arrays (280 W multi, 17% efficient, approx. Jordan, et al, “Robust PV Degradation Methodology Application” PVSC 2018 and “Compendium of Photovoltaic Degradation Rates” PiP 2016 SunPower 400 W, 22.6% efficient, compared to a Conventional Panel on same-sized arrays (310 W mono PERC, 19% efficient, approx. SunPower® Maxon solar systems produce up to 55 percent more energy than conventional systems of the same size in the first 25 years, * providing greater savings over time. IBC technology does have a higher up-front cost, but over time customers see a higher return on investment based on production. And, with better performance at higher temperatures, and the use of more of the light spectrum, the system creates more energy – even in the early morning or late evening. There is also lower degradation with SunPower® Maxeon panels compared to conventional panels, two to three times lower *, meaning more power will be produced over the life of the system. Long term, this allows a homeowner to add more if they need a larger kW system to support and electric vehicle or their energy consumption changes. With the highest-efficiency solar panels available today, there are lower installation costs while maximizing the energy produced with fewer panels needed. * The technology also eliminates the main reasons for cells losing power, failing or breaking. With a thick layer of tin-plated copper on the back, holding the cell together, Maxeon cells are 20% more efficient that PERC panels. SunPower ® Maxeon ® cells, our existing IBC platform, enables us to make the industry’s most efficient panels. This allows for the entire front of the cell to absorb sunlight, without any shading from the metal ribbons, like those on PERC cells, converting more photons to energy. Instead of front contact energy conversion, IBC has back contact energy conversion. The technology is more complicated than other solar cells, but the added value per cell makes it desirable. “Interdigitated back contact" solar cells, known as IBC solar cells, offer more efficiency, energy yield and reliability than other solar panel technologies. There are many kinds of solar panel technologies for customers to choose from. Check out our related articles if you would like to learn more about PERC solar cell technology. Below you will find information on IBC solar cell technology.
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