Molecules | |
New Acidic Precursor and Acetone-Based Solvent for Fast Perovskite Processing via Proton-Exchange Reaction with Methylamine | |
Ekaterina I. Marchenko1  Eugene A. Goodilin1  Sergey A. Fateev1  Andrey A. Petrov1  Alexey B. Tarasov1  | |
[1] Laboratory of New Materials for Solar Energetics, Department of Materials Science, Lomonosov Moscow State University, 1 Lenin Hills, 119991 Moscow, Russia; | |
关键词: thin films; methylamine; hybrid perovskites; lead halide perovskites; perovskite solar cells; lead precursor; | |
DOI : 10.3390/molecules25081856 | |
来源: DOAJ |
【 摘 要 】
A new solvent system for PbI2 based on HI solution in acetone with a low boiling point is proposed. High solubility of PbI2 is caused by the formation of iodoplumbate complexes, and reaches a concentration of 1.6 M. Upon its crystallization metastable solvate phases PbI2∙HI∙n{(CH3)2CO} are formed. The latter allows for their easy deposition on substrates in a form of smooth and uniform thin films by spin-coating. Through a fast acid-base reaction with a gaseous amine, the films of the intermediate phase can be completely converted to single-phase perovskite films. The developed method allows one to form smooth perovskite films with high crystallinity with a thickness up to 1 μm. Due to easy and fast processing, the developed method can be promising for perovskite technology upscaling.
【 授权许可】
Unknown