Why The Next Generation Technology Is N-Type TOPCon？

The earliest application of single crystal cell technology is called aluminum back field technology, which was used from 2013 to 2016. It was replaced by single crystal PERC technology in 2017. During the development of PERC technology, MWT, PERL, PERT, EWT also appeared during this period. However, due to the large-scale extrusion of PERC, or the low cost performance, mass production has not been achieved.

There are currently three technologies that can replace PERC, TOPCon, HJT and IBC. Among them, N-type IBC technology cannot compete with TOPCon and HJT at this stage due to its high cost (IBC technology can be superimposed with other technologies in the future). Therefore, At present, the most likely alternative to PERC is TOPCon and HJT technology.

N-type HJT is also a technical route that is currently hot in the market, but there are several problems in this technical route that need to be solved by the industry: first, the cost of equipment, from PERC technology to TOPCon technology, and about 70% of the battery production line is compatible. The new investment of GW is around 50-70 million, and the HJT production line needs to be rebuilt. The investment per GW is more than 350 million. Now the entire photovoltaic industry has a PERC capacity of over 200GW. After the transformation to HJT, the PERC capacity burden is The entire industry chain is unacceptable. Secondly, HJT technology needs to use 200 ℃ low temperature silver paste, the price is higher than normal silver paste, and currently mainly depends on Japan imports. In addition, the HJT technology needs to use metal indium, and the demand for indium will make the price of indium, which is not high in the earth's crust, soar, thereby pushing up the price of components.

TOPCon technology is supported by a complete technical route of sustainable development, and there is a broad space for future iterative upgrades. It is expected to be combined with IBC technology in 2024-2025 to form TBC technology, and the mass production efficiency can reach 26%-28%.

N-type TOPCon modules have four advantages, two high and two low: high efficiency, high bifacial ratio, low attenuation, low power temperature coefficient.