Heterojunction technology (HJT) is an advanced solar cell technology that combines the benefits of both crystalline silicon and amorphous silicon thin-film technologies. It uses N-type monocrystalline silicon as a substrate and deposits silicon-based thin films with different characteristics and transparent conductive films on the front and rear surfaces respectively, resulting in an N-type bifacial solar cell.

HJT technology has excellent photoabsorption and passivation effects, resulting in the highest conversion rate and power output. This technology represents the new generation of solar cell platform technology, paving the way for the development of more advanced and efficient solar panels.

The conversion efficiency of mass-produced bifacial microcrystalline HJT cells is as high as 25.2%, and the power of the module exceeds that of modules of the same size as other technologies by more than 25–55 watts.

The bifacial rate of the HJT module can reach more than 90%, with an extremely low-temperature coefficient and excellent low-light power generation capability, which can effectively enhance the power generation output of the module and increase the power generation revenue. The power generation capacity of HJT modules decreases by no more than 12% in 30 years, and the power generation capacity is more stable throughout its lifecycle.

The high conversion efficiency and low-temperature manufacturing process of HJT cells, as well as the application of thin silicon wafers, can reduce the use of raw materials such as silicon, reduce energy consumption, and effectively reduce carbon emissions.