JinkoSolar recently published three research papers within a single month in *Nature Energy*, one of the premier journals in energy research. This series showcases JinkoSolar’s major breakthroughs in TOPCon and perovskite tandem cell technologies.
26.66% – A new record for industrial-scale TOPCon cell efficiency
In collaboration with the Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, JinkoSolar developed a dual-sided electrical synergy optimization strategy, achieving a certified efficiency of 26.66% on M10‑sized silicon wafers – a new record that significantly narrows the gap to the 29.4% theoretical limit. The research reduced carrier transport losses via a high‑resistance boron emitter and optimized fine‑line grid on the front side, while the rear side employed an innovative double‑layer tunneling oxide/polysilicon structure to suppress silver‑paste puncture. Localized polysilicon thinning delivered an open‑circuit voltage of 744.6 mV, a fill factor of 85.57%, and a bifaciality of 88.3%. This provides a feasible path to enhance TOPCon’s future competitiveness.
Reference link: https://www.nature.com/articles/s41560-026-01982-2
32.73% – A scalable route for perovskite/TOPCon tandem cells
Together with Soochow University, JinkoSolar developed a full‑size bifacial TOPCon cell with a certified efficiency of 26.34%, abandoning the traditional boron‑diffused front emitter in favor of patterned n‑type TOPCon finger contacts on the front and a full‑area p‑type contact on the rear. This localized polysilicon contact reduces parasitic absorption and recombination, improving open‑circuit voltage. A “polysilicon/oxide/polysilicon” double‑layer structure was designed to overcome p‑type TOPCon’s poor contact and corrosion issues, with an ultra‑thin oxide layer blocking silver spikes – enhancing reliability and high‑temperature tolerance. Future laser patterning and back‑side localized contacts could push mass‑production efficiency toward 27%. Using this cell as the bottom cell, a monolithic perovskite/TOPCon tandem achieved a certified efficiency of 32.73% and an open‑circuit voltage of 1.961 V, retaining 80% of initial efficiency after 2,000 hours – proving industrial compatibility.
Reference link: https://www.nature.com/articles/s41560-026-02007-8
32.76% – Breaking the efficiency bottleneck on industrial TOPCon silicon
In partnership with the National University of Singapore, JinkoSolar proposed a dual‑mode coupled ligand (MBT) strategy to regulate the major organic cation (FA⁺), achieving effective control of crystallization kinetics. The resulting perovskite/TOPCon tandem cell was certified by NPVM at 32.76% – approaching the current tandem record – and retained 91% of initial efficiency after 1,700 hours. Achieving this on TOPCon silicon bottom cells (the most market‑dominant technology) provides critical scientific insights and a practical pathway to integrate high‑performance perovskite with industrial TOPCon, marking a solid step toward mainstream industrialization. This strategy is expected to combine with low‑cost, solution‑based production processes to drive commercial adoption.
Reference link: https://www.nature.com/articles/s41560-026-02010-z
Together, these breakthroughs reaffirm JinkoSolar’s leadership in N‑type TOPCon and perovskite tandem technologies, paving the way for higher efficiency, greater reliability, and scalable production.
