The Difference Between N-type Solar Cells And P-type Solar Cells
Mar 24, 2023
Solar crystalline silicon cells are divided into N-type cells and P-type cells according to the properties of silicon wafers. The difference between P-type batteries and N-type batteries is that the raw material silicon wafers and the battery preparation technology are different. P-type silicon wafers are made by doping boron elements in silicon materials, and N-type silicon wafers are made by doping phosphorus elements in silicon materials.
The raw material of P-type battery is P-type silicon wafer. The main preparation technologies include traditional Al-BSF (aluminum back field) and PERC technology emerging in recent years. The raw material of N-type battery is N-type silicon wafer. The main preparation technologies include TOPCon, HJT, PERT/PERL, IBC, etc.
P-type batteries only need to diffuse one kind of impurity, and the cost is low, but the minority carrier life is short and the conversion efficiency is low. The N-type battery has a long minority carrier life and high conversion efficiency. The difficulty lies in the need to diffuse two kinds of impurities, and the cost is relatively high.
The PERC technology of P-type cells is currently the mainstream technology of crystalline silicon cells. N-type technology is still in the initial stage of industrialization. It is the next-generation crystalline silicon cell technology, which has the characteristics of short manufacturing process, high conversion efficiency, anti-attenuation, and low temperature coefficient. It is conducive to increasing photovoltaic power generation and reducing power generation costs, and has broad development prospects. However, due to high costs, the current N-type technology is far from reaching the stage of mass production.
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