LONGi, a China-based PV company, has achieved three certified tandem solar cell efficiency records between September 2024 and July 2025. The latest achievement, released in Nature on July 7, 2025, has been created in association with Soochow University and employs an asymmetric self-assembled molecule named HTL201 to attain 34.6% efficiency with close to 2 V output. On June 26, 2025, Science featured research by LONGi and the Changchun Institute of Applied Chemistry, which has introduced diradical self-assembled molecules that improved charge transport, molecular ordering, and operational stability. An earlier study published in Nature in September 2024 by LONGi has demonstrated a bilayer passivation method using lithium fluoride and diammonium diiodide, achieving 33.9% efficiency. These innovations were designed to reduce non-radiative recombination and optimize buried interface quality, aiming to exceed the 33.7% single-junction limit. All records - 33.9%, 34.2%, and 34.6% - have been listed in Versions 63 to 65 of Martin Green’s Solar Cell Efficiency Tables. At SNEC 2025, LONGi also achieved NREL-certified records for a 33% tandem cell.