CH3NH3PbI3 and CH3NH3PbBr3 films deposited by automated spray-pyrolysis for applications in photovoltaic energy

Abstract

The substrate was a smooth and transparent glass slide, commonly employed in microscopic analysis, that was precisely cut and meticulously cleaned to facilitate its fitting in the automated spray-pyrolysis (ASP) deposition system. To obtain the precursor solutions, the reagents were calculated by stoichiometry, diluted in the dimethylformamide (DMF) solvent (99.8% purity), and magnetically stirred for 40 min. Lead iodide (PbI 2 , powder, 99.0% purity)