LONGi’s tandem perovskite research published in journals

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).