Jinergy's Novel Mirror-like Surface Treatment for HJT Cells Enables New Efficiency Breakthrough in Cell Efficiency
Recently, Jinneng Clean Energy Technology Ltd. (hereinafter referred to as “Jinergy”) has achieved a major breakthrough in the field of high-efficiency photovoltaic cell technology. After being optimized by the company’s self-developed novel mirror-like surface treatment technology, the conversion efficiency of HJT cells has been increased significantly by 0.25%, paving the new way for the research and development of advanced technologies.
HJT cells, leveraging their advantages of high conversion efficiency, low temperature coefficient, and bifacial power generation, are regarded as one of the core directions for next-generation photovoltaic technologies. Compared with other types of cells, HJT cells combine the strengths of crystalline silicon and amorphous silicon thin films, offering a higher theoretical efficiency limit, a simpler process flow, and more significant cost-reduction potential. In recent years, as demands for high-efficiency, low-carbon technologies have surged in the photovoltaic industry, novel mirror-like surface treatment technology for HJT cells increasingly becomes the focus of global R&D competition.
According to reports, this technology enhances the passivation effect at the crystalline silicon cell interface by optimizing the cleaning process of HJT monocrystalline silicon wafers, performing mirror finishing on the wafer surface, and matching it with the new microcrystalline silicon thin-film structure. This improves the light absorption efficiency within the cell, effectively reduces carrier recombination losses in the microcrystalline silicon, simultaneously increases the open-circuit voltage and fill factor of the cells, and lowers the risk of performance degradation caused by surface defects during long-term use—thereby enhancing the stability and reliability of the cells, and ultimately achieving a significant increase of 0.25% in conversion efficiency. This technical solution not only preserves the core advantages of HJT cells, namely low degradation and high bifaciality, but also further unlocks their efficiency potential.
A technical representative from Jinergy stated: “An efficiency improvement of 0.25% may appear modest, but its significance is profound.” The photovoltaic industry is currently in a critical period of N-type technology replacing P-type technology. HJT cells have attracted considerable attention due to their performance advantages; however, mass-production efficiency and cost remain bottlenecks for large-scale application. According to industry calculation standards, for every 0.1% increase in photovoltaic cell efficiency, the levelized cost of electricity (LCOE) can be reduced by approximately 0.5%.
Industry experts noted that this breakthrough will promote collaborative innovation across the upstream and downstream industrial chains, driving optimization of equipment, materials, and processes, thereby consolidating the leading position of Chinese photovoltaic enterprises in global technology competition. As a representative of N-type high-efficiency cell technology, sustained breakthroughs in the efficiency of HJT cells will further strengthen their competitiveness in photovoltaic technology iteration.
