New Acidic Precursor and Acetone-Based Solvent for Fast Perovskite Processing via Proton-Exchange Reaction with Methylamine

Molecules

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