Communication—Large Electron-Hole Diffusion Lengths in Methylammonium Lead Triiodide Perovskite Films Prepared by an Electrochemical-Chemical Approach. (29th November 2017)

• Record Type: Journal Article
• Authors: Macor, Lorena; Sigal, Agustín; Dittrich, Thomas; Rappich, Jörg; Otero, Luis; Gervaldo, Miguel
• Is Part Of: ECS journal of solid state science and technology. Volume 6:Number 12(2017)
• Page Start: P819
• Page End: P821
• Publication Date: 2017-11-29
• Subjects: Lead dioxide -- Perovskite -- Surface photovoltage; Solid state chemistry -- Periodicals; Electronics -- Materials -- Periodicals; Electrochemistry -- Periodicals; 541.0421
• DOI: 10.1149/2.0181712jss
• Languages: English
• ISSNs: 2162-8777

Abstract

Abstract : Methylammonium lead triiodide (CH3 NH3 PbI3 ) perovskite films were generated by chemical conversion of PbO2 layers electro-deposited over NiO hole selective contact, by simple immersion in CH3 NH3 I isopropanol solution under ambient conditions. 2.4 μm charge carrier diffusion lengths were measured by surface photovoltage, being these very similar to the size of the as formed perovskite crystals, showing that there are not deleterious encounters with defects or impurities. The electrochemical procedure used here demonstrates the capacity of this technique for the fabrication of perovskite films with large electron-hole diffusion lengths by solution based processes using only water and isopropanol.