"It did it, we did it successfully!" There were bursts of excited cheers from the Longi High-Efficiency Single Crystal Battery R&D Center located in Xi'an, Shaanxi. On September 19, the silicon heterojunction battery (P-HJT) independently developed by Longi Green Energy Technology Co., Ltd. (hereinafter referred to as "Longi Green Energy") achieved a new breakthrough in efficiency: on the gallium-doped P-type full-size single crystal silicon wafer, the conversion efficiency of silicon heterojunction battery was pushed to 26.12%. "This is the highest record of P-type silicon battery efficiency so far, further verifying the feasibility of low-cost silicon heterojunction mass production technology." said Li Zhenguo, founder and president of Longi Green Energy, , .
high efficiency single crystal component production process
photovoltaic cell conversion efficiency refers to the battery's ability to convert light energy into electrical energy, which is closely related to the cost of electricity. "The same area absorbs the same light, and the more electricity it can emit, the better." Li Zhenguo introduced that taking battery cell as an example, based on the 20% conversion efficiency, it is estimated that every time one point of conversion efficiency is improved, the cost of downstream power stations can be saved by more than 5%. "So, every 0.01 percentage point increase in battery conversion efficiency is of great significance," said Li Zhenguo.
This is not the first time that Longi Green Energy has broken a world record. Since April 2021, Longi Green Energy has set a world record for battery conversion efficiency 11 times. It is worth noting that in addition to P-type HJI solar cells, Longi Green Energy has invested in R&D in various battery technology routes and is at the leading level, pushing the conversion efficiency of N-type TOPCon, P-type TOPCon and N-type HJTh solar cells to 25.21%, 25.19%, and 26.30%, and maintaining relevant world records.
Li Zhenguo said that under the existing technical route, some scientists predict that the theoretical limit of conversion efficiency of crystalline silicon cells is 30%, and some prediction model believes that this limit is 29.05%. No matter which one is the norm, Longi Green Energy's R&D results are getting closer and closer to the limit of commercial application of photovoltaic cells.
According to China Photovoltaic Association data, in the first half of this year, the year-on-year growth rate of output in my country's main links of the photovoltaic supply chain exceeded 45%. In the first eight months, the new installed capacity of photovoltaic was 44.47GW, a year-on-year increase of 106%; the total export volume of photovoltaic products from January to August reached US$35.77 billion, and the export volume of photovoltaic modules exceeded 100GW, both of which exceeded the whole year of 2021.
Honorary Chairman of the China Photovoltaic Industry Association said: "In the new era, the photovoltaic industry needs to continuously cultivate itself, continue to innovate and develop, reduce costs and increase efficiency, and coordinated development of the industry, so that photovoltaics can truly become the main force of the new power system." Standing at a new starting point, upstream and downstream enterprises in the photovoltaic industry will continue to bring green beauty with the power of innovation, write a new chapter of high-quality development with a more uplifting attitude, and contribute China's strength to the global energy transformation.
Author丨Zhang Weijia
Edit丨Liu Jing
Editor丨Maria
Producer丨Zhao Chen
