% and 33.9% mean that China's technology has achieved the world's first in the two new energy tracks of silicon-based single-junction batteries and silicon-based tandem batteries! 26.81
%
On November 19, 2022, according to the certification report of Hamelin Solar Energy Research Institute (ISFH) in Germany, the conversion efficiency of silicon heterojunction cells independently developed by Longji Green Energy, a leading global photovoltaic company in Xi'an, was achieved. It has broken the new record of silicon solar cell efficiency which has been monopolized by foreign countries and dust-laden for five years, which is also the first world record of silicon cell efficiency created by Chinese solar energy technology enterprises in photovoltaic history. 33.9
%
On November 3, 2023, according to the latest certification report of the National Renewable Energy Laboratory (NREL) of the United States, Longji Green Energy achieved another success, and its self-developed crystalline silicon-perovskite tandem battery refreshed the 33.7% efficiency index previously maintained by the King's University of Science and Technology of Saudi Arabia. It has become the highest efficiency record of crystalline silicon-perovskite tandem cells in the world. This is also the first time that the efficiency record of this technology has been broken by Chinese enterprises since it was recorded in 2016. The photoelectric conversion efficiency of
solar cells is the key index and wind vane to evaluate the potential of photovoltaic technology. " Photovoltaic industry is a cost-oriented industry, reducing costs and increasing efficiency is the core of development, and continuously improving the conversion efficiency of photovoltaic cells is an effective measure to reduce the cost of electricity.". Once this high-efficiency battery technology really achieves mass production, it will promote the cost of photovoltaic power generation to be greatly reduced, which is absolutely good for promoting the growth of photovoltaic market in China and even in the world. The growth of the photovoltaic market will also drive the whole energy transformation and energy transformation. Jiang Hua, deputy Secretary-General of China Photovoltaic Industry Association, said in an interview earlier.
As the mainstream battery technology occupying more than 90% of the market share, the conversion efficiency of crystalline silicon single-junction battery has been continuously improved, which is getting closer and closer to its theoretical efficiency limit of 29.4%. The theoretical efficiency limit of crystalline silicon-perovskite tandem cells can reach 43%, which is recognized as the mainstream technology to break through the efficiency limit of monocrystalline silicon cells.
"26.81% and 33.9%, behind these two world record data, in fact represent the most mainstream technology in the global photovoltaic field and the most mainstream technology in the next generation respectively." Zhong Baoshen, chairman of Longji Green Energy, recently made this statement at the 17th China New Energy International Exposition and Summit Forum, which more clearly "demarcated" the significance of China's technology "world double champion". Through independent research and development,
Chinese enterprises have achieved the "double track global record creator". While we cheer for it, it is not difficult to imagine the hardships and efforts of the process.
"No matter how the external environment changes, technological innovation is still the eternal theme of the photovoltaic industry." Zhong Baoshen sighed at this. He traced the development process of the domestic photovoltaic industry , "from the past raw materials outside, the market outside, the equipment outside the" three heads outside "to the present overall lead, thanks to technological innovation, the cost of electricity has been reduced by more than 90%, photovoltaic can compete with traditional thermal power and enter the era of parity ahead of time.". On this basis, photovoltaic can really fly into ordinary people's homes from the original luxury goods, and play an important role in the global energy transformation and the realization of carbon neutrality in the future.
Scientific research is a road that few people take, a road of inch advance and a pawn of day arch. Take the record-breaking path of silicon-based tandem batteries as an example.
"We have gone through nearly three years to achieve the efficiency of 33.9%." Zhong Baoshen revealed that the laminated battery project was established in 2020; the equipment was introduced in January 2021; the first certification efficiency was 23.3% in June 2021; through continuous climbing and experiments, it broke through 31.8% in May this year, "at that time, it was only the first in China, and the world just squeezed into the top three"; in June, it reached 33.5%. Through continuous self-breakthrough, it created an absolute leading value of 33.9% in November.
"In order to achieve the technological breakthrough of refreshing the world record, Longji scientific research team has gone through 960 days and nights, carried out more than 1700 batches of experiments, collected data of more than 83000 batteries, regardless of weekends or the Spring Festival holidays, scientific research work insists on" personnel rotation, equipment rest ". Dr. Xu Xixiang, chief scientist of Longji Green Energy and vice president of Academia Sinica, said.
According to the statistics of market observers, since 2021, Longji has constantly surpassed itself and has broken the world record of photovoltaic solar cell conversion efficiency 15 times in a row.
Scientific and technological innovation needs to calm down and endure loneliness, and needs continuous investment day after day and year after year.
Data show that Longji Green Energy has been focusing on the main line of technological innovation for a long time. From its listing in 2012 to the end of June 2023, Longji Green Energy has invested 22 billion yuan in R & D and obtained 2525 patents. In the past five years, R & D investment has reached 18 billion yuan.
"Technological innovation is the gene of Longji and the foundation of Longji." Zhong Baoshen said that in the future, Longji will continue to promote technological innovation and collaborative innovation and make more contributions to the industry.
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