Development and Future of Photovoltaic HJT Cells

Abstract

Heterojunction Technology (HJT) cells, also known as heterojunction cells, feature a unique PN junction structure. They are formed by covering a crystalline silicon substrate with a layer of amorphous silicon film, combining the properties of both amorphous and crystalline silicon. As a type of N-type cell, HJT cells hold significant importance in the photovoltaic field. They offer high conversion efficiency, a straightforward manufacturing process, applicability to thin silicon wafers, a low-temperature coefficient, and no light-induced degradation or potential-induced degradation, and they can generate electricity on both sides. Notably, HJT cells can be advantageously combined with other technologies. By integrating advanced technologies like IBC and perovskite, the theoretical conversion efficiency of HJT cells could potentially exceed 30%. This prospect makes HJT cells a highly competitive choice in the photovoltaic industry.