Scientists create effective inverted perovskite solar cells making use of a novel molecular hole-transporter

• Researchers from East China University of Science and also Technology, Jilin University, Huazhong University of Science and also Technology, ShanghaiTech University, Chinese Academy of Sciences, Shanghai Jiao Tong University and also University of Potsdam have actually located that a new molecular hole-transporter can improve the performance of inverted perovskite solar cells and mini modules.

Inverted perovskite solar cells are seen as especially promising thanks to their basic fabrication at low costs and their family member stability. Inverted perovskite solar cells appear like natural solar cells, with a layer of perovskite replacing the natural absorber layer. In the recent research, the authors established a novel hole transportation layer based upon a self-assembled monolayer. This monolayer contains amphiphilic molecules, molecules that are both hydrophilic (water-soluble) and hydrophobic (water-fearing).

"The freshly developed amphiphilic molecules offer a superwetting underlayer for the perovskite layer. This enhances the morphology as well as condensation of the perovskite at the buried interface to the hole transportation layers which lowers interfacial recombination losses" discusses Martin Stolterfoht, leader of the PotsdamPero team as well as matching author.

The resulting perovskite films were really emissive (giving off 17% of the inbound light under open-circuit) as well as allowed record perovskite solar cells with a reported licensed efficiency of 25.4%. In addition, 10 square centimeters mini modules provided efficiencies of 22.0% with amazing stability under both functional and damp warmth examination conditions.