New technique based upon bis-diazirine (BD) molecules enables stable and also efficient perovskite solar cells

• Scientists from China's Fudan University, Central South University, East China Normal University, Chinese Academy of Sciences and Suzhou University of Science as well as Technology, together with Canada's University of Victoria and also Austria's University of Vienna, have actually recommended a novel strategy to achieve reliable and also stable perovskite solar cells (PSCs) through introducing bis-diazirine molecules to paralyze the organic cations by covalent bonds.

The resulting PSCs displayed a high qualified efficiency of over 24% with lengthy operational security of over 1,000 hours. The scientists think that this strategy also has great prospective in various other perovskite-based optoelectronic devices.

The group's method was based on the use of a new sticky to shield perovskites. It's called BondLynx, and also it was originally created by Canadian materials firm XlynX for various other objectives before being checked on solar cells.

BondLynx is a crosslinker that creates chemical covalent bonds with organic components, avoiding them from getting loose and also minimizing performance.

The team treated perovskite solar cells with BondLynx, and after that revealed them to long-lasting heat and also light to see exactly how they carried out compared to solar cells that hadn't been dealt with. The solar cells began with an effectiveness of 24%, and preserved practically 99% of this after 1,000 hours of continuous exposure to simulated sunshine. Comparative, neglected solar cells shed 35% of their original effectiveness under the very same problems over the very same period.

The solar cells were also exposed to a continuous heat of 60 ° C (140 ° F) for 600 hrs. The BondLynx-treated ones managed to hang onto nearly 98% of their efficiency over that time, while the control group shed 27% of theirs.