LONGi Sets a New World Record of 27.09% for the Efficiency of Silicon Heterojunction Back-Contact (HBC) Solar Cells

XI'AN, China, Jan. 5, 2024 /PRNewswire/ — The world-leading solar technology company, LONGi Green Energy Technology Co., Ltd. (hereafter as "LONGi"), announced today that it has set a new world record of 27.09% for the efficiency of crystalline silicon heterojunction back-contact (HBC) solar cells, certified by the Institute for Solar Energy Research Hamelin (ISFH) in Germany. The 27.09% efficiency HBC cell was developed independently in LONGi using an all-laser patterning process. This is a new world record for single-crystalline silicon solar cells, breaking the 26.81% efficiency record announced in November 2022.

To mitigate the problem of high patterning cost for back-contact cells, the R&D team in LONGi has been continuing technological innovation, abandoned the costly photolithography process, and successfully developed an all-laser patterning process. The all-laser patterning process was utilized in the 27.09% efficiency record cell.

Another advantage of HBC cells over bifacial heterojunction solar cells is the reduced usage of transparent conductive oxide layers (ITO). Through continuous technological improvements, LONGi's R&D team has developed an ultra-thin TCO layer with reduced indium usage. The indium usage of the 27.09% efficiency record cell is only 1/5 of that of traditional bifacial heterojunction solar cells.

"Innovation is the core competitiveness of enterprises and LONGi is committed to 'making the best of solar energy to build a green world'. We at LONGi believe that photovoltaics will play a crucial role in the worldwide energy transition," said Li Zhenguo, Founder & President of LONGi. Li highlighted the company's continuous pursuit of high-quality product and high-efficiency solar cell technology.

About LONGi

Founded in 2000, LONGi is committed to being the world's leading solar technology company, focusing on customer-driven value creation for full scenario energy transformation.

Under its mission of 'making the best of solar energy to build a green world', LONGi has dedicated itself to technology innovation and established five business sectors, covering mono silicon wafers cells and modules, commercial & industrial distributed solar solutions, green energy solutions and hydrogen equipment. The company has honed its capabilities to provide green energy and has more recently, also embraced green hydrogen products and solutions to support global zero carbon development. www.longi.com

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