What is the prospect of TopCon battery?

Advantages of TopCon Batteries

1. High battery conversion efficiency, excellent interface passivation and carrier transport capacity, high Voc and FF;

2. The light-induced attenuation is low, and the boron content in phosphorus-doped N-type crystalline silicon is extremely low, which weakens the influence of boron and oxygen on the pair;

3. Process equipment production line High compatibility, compatible with PERC, N-PERT double-sided cell high-temperature preparation process production line;

4. N-type TOPCon cells can be combined with SE, IBC, multi-busbar, half-cell, and lamination technologies to significantly improve cell efficiency and module power.

Disadvantages of TopCon Batteries

1. The cost is high. Compared with the standard PERC process, the capital expenditure of TOPCon technology is about 10% higher, and the operating cost is about 25% higher;

2. The potential for efficiency improvement is limited.

Cost reduction optimization direction

1. Reduce the thickness of the n-poly layer, reduce the cost, and reduce the absorption of free carriers;

2. Avoid edge wrapping and improve battery performance;

3. Equipment maturity and cost reduction;

4. A breakthrough in slurry performance.

In order to further improve battery efficiency, the photovoltaic technology route has been upgraded from P-type to N-type, starting the next round of battery technology change. Due to its excellent efficiency and compatibility, TOPCon has attracted more and more attention from the market, and has become an entry point for the industrialization of N-type high-efficiency batteries.