Three Papers Published Consecutively in Nature Energy: JinkoSolar’s Breakthroughs in TOPCon/Perovskite Ta

SHANGHAI, April 18, 2026/ CNW/– JinkoSolar, the international leading PV and ESS provider, just recently released 3 research study documents in succession within a single month in Nature Energy, among the premier journals in the field of energy research study. This series of documents showcases JinkoSolar’s numerous significant advancements in TOPCon and perovskite tandem cell innovations.

JinkoSolar, in cooperation with the research study group from the Ningbo Institute of Products Innovation and Engineering of the Chinese Academy of Sciences, effectively established a dual-sided electrical synergy optimization technique. This method attained a licensed performance of approximately 26.66% on M10-sized silicon wafers, setting a brand-new performance record for industrial-scale TOPCon cells and considerably narrowing the space in between industrial-scale TOPCon cells and the theoretical performance of 29.4%.

Furthermore, the research study lowered provider transportation losses through a high-resistance boron emitter on the front side and an enhanced fine-line grid style, while the rear end utilizes an ingenious double-layer tunneling silicon oxide/polysilicon structure on the rear side to successfully reduce efficiency deterioration brought on by silver paste leak. In addition, by using localized polysilicon thinning innovation, the research study attained impressive efficiency metrics, consisting of an open-circuit voltage of 744.6 mV, a fill aspect of 85.57%, and a bifaciality of 88.3%. This accomplishment offers a possible and detailed service for narrowing the performance space in between TOPCon cells and the theoretical limitation, considerably boosting the core competitiveness of TOPCon innovation in the future photovoltaic market.

JinkoSolar, in cooperation with the research study group from Soochow University, has actually effectively established a full-size bifacial TOPCon crystalline silicon solar battery with a licensed photoconversion performance of 26.34%. This research study deserts the conventional TOPCon cell style including a boron-diffused emitter on the front surface area. Rather, it innovatively presents patterned n-type TOPCon finger contacts on the front surface area while keeping the full-area p-type TOPCon contact on the back. By localizing the polycrystalline silicon contact location, this structure considerably minimizes parasitic absorption and recombination losses on the front surface area, accomplishing a licensed performance of 26.34% and considerably enhancing the open-circuit voltage.

In addition, to attend to the concerns of bad contact efficiency and vulnerability to metal paste deterioration in P-type TOPCon, a “polysilicon/silicon dioxide/polysilicon” double-layer composite structure was developed. Integrated with enhanced rear-side polishing and a specifically developed silver paste, this structure not just accomplishes very low contact resistance and recombination existing however, more significantly, the ultra-thin oxide layer in the center successfully avoids silver crystal spikes from permeating the silicon substrate, considerably boosting the gadget’s dependability and high-temperature resistance. In the future, by enhancing the accuracy of laser pattern to more narrow the finger width and presenting localized contacts on the rear end to lower the polycrystalline silicon layer density, parasitic absorption can be lowered, and mass production performance is anticipated to approach 27%.

Utilizing a high-efficiency bifacial TOPCon cell with a textured front surface area as the bottom cell, the research study group produced a monolithic perovskite/TOPCon tandem cell, accomplishing a licensed performance of 32.73% and a high open-circuit voltage of 1.961 V. These outcomes not just set a brand-new efficiency record for this class of tandem cells however likewise showed outstanding long-lasting functional stability (keeping 80% of the preliminary performance after 2,000 hours), showing the tremendous capacity of this TOPCon innovation path in tandem applications. They likewise supply a scalable and industrially suitable technical path for the advancement of higher-efficiency TOPCon and perovskite/TOPCon tandem photovoltaic modules.

To attend to the important difficulty of quick perovskite formation and movie quality deterioration brought on by the high thermal conductivity of commercial thin silicon substrates, JinkoSolar, in cooperation with the National University of Singapore and other research study organizations, innovatively proposed a technique to manage the significant natural cation (FA ⁺) utilizing a dual-mode-coupled ligand (MBT), effectively accomplishing reliable control over formation kinetics. A perovskite/TOPCon tandem solar battery produced utilizing this technique was licensed by the National Photovoltaic Market Metrology and Screening Center (NPVM) with a conversion performance of 32.76%, approaching the existing performance record for tandem solar batteries. Furthermore, the cell kept 91% of its preliminary performance after 1,700 hours of constant operation, showing outstanding long-lasting functional dependability.

This research study is of considerable significance as it accomplishes high performance (licensed at 32.76%) in TOPCon silicon-back-contact cells, which hold the best capacity for market supremacy. Not just does it raise the performance of perovskite/TOPCon tandem cells to brand-new heights, however more significantly, it offers important clinical insights and a useful path for incorporating high-performance perovskite products from the lab with market-dominant TOPCon silicon innovation, marking a strong action towards the mainstream industrialization of perovskite/ crystalline silicon tandem innovation towards mainstream industrialization. In the future, this technique is anticipated to be integrated with solution-based production procedures– which provide the capacity for massive fabrication and low expenses– to drive the commercial application of these research study findings.