Optically tuned and large-grained bromine doped CH3NH3PbI3 perovskite thin films via aerosol-assisted chemical vapour deposition

Basak, S; Afzaal, M; Yates, HM

Abstract

Herein, doping of methylammonium lead iodide perovskite thin films with bromine ions is
successfully performed for the first time using the aerosol-assisted chemical vapour deposition
process. Depending on the doping levels, photoluminescence spectra are shifted relative to their
bandgap values. Detailed analysis of scanning electron microscope images showed that
increasing the bromine levels linearly increased the grain sizes. The unchanged amount of
detected lead provided evidence for the controlled processing conditions. Both bulk and surface
compositional techniques confirmed the deposition of marginally iodine rich perovskite thin
films.

• Journal Article Type: Article
• Acceptance Date: Oct 28, 2018
• Online Publication Date: Oct 29, 2018
• Publication Date: Feb 1, 2019
• Deposit Date: Nov 9, 2018
• Publicly Available Date: Oct 29, 2019
• Journal: Journal of Materials Chemistry and Physics
• Print ISSN: 0254-0584
• Publisher: Elsevier
• Volume: 223
• Pages: 157-163
• DOI: https://doi.org/10.1016/j.matchemphys.2018.10.054
• Publisher URL: https://doi.org/10.1016/j.matchemphys.2018.10.054
• Related Public URLs: http://doi.org/10.1016/j.matchemphys.2018.10.054
• Additional Information: Projects : CHEOPS