Lead Iodide and Perovskite Films Obtained by Iodination of PbS Thin Films

Author(s)

Clemente da Silva Filho, Jose Maria ^[1] ; Landers, Richard ^[1] ; Marques, Francisco Chagas ^[1]

Affiliation

^[1] Univ Estadual Campinas, Gleb Wataghin Inst Phys, 777 Sergio Buarque de Holanda St Cidade Univ, BR-13083859 Campinas, SP - Brazil

• Document type: Journal article
• Source: Journal of Inorganic and Organometallic Polymers and Materials; v. 29, n. 6, p. 2161-2167, NOV 2019.
• Web of Science Citations: 0

Abstract

Here we demonstrate a low-temperature process for the synthesis of pinhole-free lead iodide and perovskite (CH3NH3PbI3) films. The approach consists in converting amorphous sputtered lead sulfide films onto lead iodide (PbI2) films through an iodination process. The following step consists of the conversion of PbI2 into CH3NH3PbI3 through dipping into methylammonium iodide (CH3NH3I) solution. The effectiveness of this new route was investigated through X-ray diffraction, optical transmittance, scanning electron microscopy and X-ray photoelectron spectroscopy. This method is comprehensibly compatible with large-scale and large-area deposition and provides a convenient and highly reproducible route for the preparation of perovskite thin films. (AU)

• FAPESP's process: 12/10127-5 - Research and development of nanostructured materials for electronic and surface physics applications
• Grantee: Fernando Alvarez
• Support Opportunities: Research Projects - Thematic Grants