Global solar technology leader LONGi has announced a series of breakthrough achievements in perovskite-silicon tandem solar cell research. On June 26, 2025, the results of a joint study between LONGi and the Changchun Institute of Applied Chemistry (CIAC) of the Chinese Academy of Sciences were published in Science. The paper, titled Stable and uniform self-assembled organic diradical molecules for perovskite photovoltaics, presents a novel open-shell diradical organic molecule that significantly improves both the efficiency and stability of perovskite solar cells.
In July 2025, another collaboration between LONGi and Soochow University, titled Efficient perovskite/silicon tandem with asymmetric self-assembly molecule, was published in Nature. This work leveraged a new self-assembled organic molecule (HTL201) with an asymmetric structure to facilitate high-quality perovskite film deposition, leading to a certified tandem cell efficiency of 34.6%.
Previously, in 2023, LONGi’s laboratory achieved a record perovskite-silicon tandem cell conversion efficiency of 33.9%, surpassing the Shockley-Queisser limit for single-junction cells (33.7%). The results were published in Nature in 2024.
In April, LONGi announced that its silicon-perovskite 2-terminal tandem solar cell developed in-house had achieved a conversion efficiency of 34.85% (see China Solar PV News Snippets).
Solar cell and module maker HY Solar has signed a Cooperative Management Agreement with SF-PV, solar module manufacturer Suntech’s parent company. Under this agreement, HY Solar will oversee Suntech’s operations for a 5-year term, with responsibilities spanning operations, finance, HR, and market expansion, but excluding board and shareholder-level decisions. The cooperation period may be extended upon mutual agreement. Despite the partnership, SF-PV will remain solely responsible for all business risks and liabilities during the term.
Previously, at the end of 2024, Xiamen Jianfa Group had taken over temporary custodianship of Suntech from SF-PV. With HY Solar’s involvement, Jianfa’s custodianship has officially concluded. Last month, Suntech entered a second round of restructuring (see China Solar PV News Snippets).
Perovskite solar module manufacturer Perovs is building a large-scale production base for perovskite solar modules in Jiangjin District, Chongqing. With a total investment of RMB 5 billion ($694 million), the facility will be constructed in 2 phases and eventually include production lines with 3 GW of annual capacity. Construction on the plant began in October 2024 and is progressing steadily according to local reports. The company has invested about RMB 140 million ($19.4 million) until now, and 25% of the site’s groundwork has been completed.
Earlier this week, Perovs announced its plans to establish a 200 MW perovskite production line in Xining, Qinghai Province (see China Solar PV News Snippets).
A subsidiary of China General Nuclear Power Group (CGN) has signed an agreement to develop a 700 MW renewable-powered hydrogen production demonstration project in Yumen, Gansu Province. This is one of China’s large-scale wind and solar base projects located in desert, Gobi, and barren land.
The hybrid energy project will include 100 MW of solar thermal, 200 MW of solar photovoltaics, and 400 MW of wind power, all supplying green electricity for hydrogen production. The facility is designed to produce hydrogen at a rate of 4,000 Nm³/h and store up to 8,000 m³ of hydrogen across four 2,000 m³ spherical tanks (operating pressure 0.3-1.6 MPa). Average annual green hydrogen output is expected to reach 2,857.14 tons.