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The theoretical efficiency of N-type TOPCon cells can reach 28.7%, and the theoretical efficiency of heterojunction cells can reach 27.5%. TOPCon technology is a technology based on the “N-type cell” process, and continues to develop the “tunneling through oxide layer passivation contact”.
N-type cell technology can be subdivided into heterojunction (HJT), TOPCon, IBC and other technology types. Currently, PV cell manufacturers mostly choose TOPCon or HJT to pursue mass production. The theoretical efficiency of N-type TOPCon cells can reach 28.7%, and the theoretical efficiency of heterojunction cells can reach 27.5%.
N-type cells have many advantages, including high conversion efficiency, high bifacial rate, low temperature coefficient, no light decay, good weak light effect, and longer carrier life. N-type cell technology can be subdivided into heterojunction (HJT), TOPCon, IBC and other technology types.
According to theoretical calculation, the current TOPCon mainstream battery mass production efficiency is about 23.7-23.8%, some battery manufacturers announced that they have achieved 24.0%+, including: many companies such as Zhonglai shares have achieved laboratory efficiency of 25% or more, and the future prospects are bright.
TOPCon holds a significant advantage in expanding N-type cell production capacity, and it is projected to reach a cell capacity of approximately 441GW in 2023, accounting for 80.27% of the market share. However, the presence of new entrants with less advanced technology could potentially impact the overall production capacity.
In recent years, there has been many developments in n-type c-Si solar cells basically due to the advantages of n-type c-Si wafers over p-type wafers. However, there are some limitations in making n-type solar cells considering the technologies involved to fabricate p-type cells.
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