Researchers establish high-efficiency monolithic perovskite/black silicon TOPCon tandem solar cells

• A research study team led by Prof. Ye Jichun at the Ningbo Institute of Materials Technology and Engineering (NIMTE) of the Chinese Academy of Sciences (CAS) has established high-performance monolithic perovskite/black silicon (b-Si) solar cells with a tunnel oxide passivated call (TOPCon), achieving a certified power conversion efficiency (PCE) of 28.2%. Results were published in Joule.

Perovskite/silicon tandems use an appealing pathway to enhance the PCE of solar cells with reasonably low cost, as well as are thus predicted as an arising focus in the field of high-efficiency solar cells. Nevertheless, most reported monolithic perovskite/silicon tandems either experience high prices and also minimal light trapping, or have problem in achieving top notch perovskite films, leading to a terrific challenge in enhancing the efficiency of perovskite/b-Si solar cells.

To resolve this issue, the researchers developed the first monolithic perovskite/Si tandem solar cells based upon industry-relevant b-Si with TOPCon structures.

Combined with the TOPCon, the surface area reconstruction of the b-Si contributes to an excellent trade-off in between high-level surface passivation and also broadband light trapping.

The rebuilded nanotexture of b-Si can dramatically boost the moisture resistance as well as promote the wetting of perovskite. In addition, the b-Si guides the vertically straightened crystal growth of perovskite with nanoconfinement effect, lowering provider recombination and also helping with service provider collection. Additionally, b-Si alleviates the film strains, thus enhancing the stability of the gadget.

With an open-circuit voltage of 1.80 V, fill variable of 81.8%, and a short-circuit present thickness of 19.2 mA/cm2, the ready monolithic perovskite/b-Si TOPCon tandem solar cells produce an incredibly high accredited PCE of 28.2%, which is among the highest possible reported worths for perovskite/Si solar cells with either TOPCon or double-side-textured Si to date.

The unique method in this work can clarify the development and manufacture of high-performance perovskite/b-Si tandem solar cells.