Heterojunction (HJT) Technology

About

Heterojunction (HJT) technology is a hybrid solar cell technology that combines the strengths of crystalline silicon and amorphous silicon thin-film technologies. It enhances efficiency by using a heterojunction formed between semiconductors with different band gaps. HJT cells typically consist of a crystalline silicon substrate passivated by thin layers of amorphous silicon, which act as selective contacts. This structure allows for improved passivation and reduced recombination losses, leading to higher cell efficiencies. HJT technology offers several advantages, including high bifaciality, stable performance in high temperatures, and reduced degradation over time. The manufacturing process is simplified, involving fewer steps than other technologies like PERC and TOPCon. This results in cost savings and increased production efficiency. HJT cells are suitable for various applications, including utility-scale solar farms and building-integrated photovoltaics, due to their superior efficiency and durability. They are expected to play a significant role in the future of solar energy.