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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/23340

Title: Structure–Property Relations of Methylamine Vapor Treated Hybrid Perovskite CH3NH3PbI3 Films and Solar Cells
Authors: Conings, Bert
Bretschneider, Simon
Babayigit, Aslihan
Gauquelin, Nicolas
Cardinaletti, Ilaria
Manca, Jean
Verbeeck, Jo
Snaith, Henry
Boyen, Hans-Gerhard
Issue Date: 2017
Citation: ACS Applied Materials & Interfaces, 9(9), p. 8092-8099
Abstract: The power conversion efficiency of halide perovskite solar cells is heavily dependent on the perovskite layer being sufficiently smooth and pinhole-free. It has been shown that these features can be obtained even when starting out from rough and discontinuous perovskite film by briefly exposing the film to methylamine (MA) vapor. The exact underlying physical mechanisms of this phenomenon are, however, still unclear. By investigating smooth, MA treated films based on very rough and discontinuous reference films of methylammonium triiode (MAPbI3) and considering their morphology, crystalline features, local conductive properties, and charge carrier lifetime, we unraveled the relation between their characteristic physical qualities and their performance in corresponding solar cells. We discovered that the extensive improvement in photovoltaic performance upon MA treatment is a consequence of the induced morphological enhancement of the perovskite layer together with improved electron injection into TiO2, which in fact compensates for an otherwise compromised bulk electronic quality simultaneously caused by the MA treatment.
Notes: Conings, B (reprint author), Hasselt Univ, Inst Mat Res IMO, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. bert.conings@uhasselt.be
URI: http://hdl.handle.net/1942/23340
DOI: 10.1021/acsami.6b15175
ISI #: 000396186000025
ISSN: 1944-8244
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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