Lookup NU author(s): Dr Pablo Docampo
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
Understanding the charge carrier dynamics and charge transport in metal halide perovskites and their correlation to the synthesis procedure is crucial for the fabrication of competitive thin film photovoltaic devices and their further improvement. In this work we investigate two CH3NH3PbI3 films both deposited by a two-step protocol and only differing in the optional addition of a chloride containing salt to the precursor solution. Although being highly akin from a chemical point of view, these films show substantial differences in their optoelectronic characteristics, such as enhanced charge carrier mobilities in the chloride-treated perovskite films. We furthermore observe different light-soaking behavior and increased photoluminescence lifetimes which we assign to the chloride addition during film deposition resulting in controlled crystal growth with fewer defects.
Author(s): Grill I, Handloser K, Hanusch FC, Giesbrecht N, Bein T, Docampo P, Handloser M, Hartschuh A
Publication type: Article
Publication status: Published
Journal: Solar Energy Materials & Solar Cells
Print publication date: 01/07/2017
Online publication date: 28/11/2016
Acceptance date: 18/11/2016
ISSN (print): 0927-0248
Publisher: Elsevier BV * North-Holland
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