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Synthesis of Perfectly Oriented and Micrometer-Sized MAPbBr3 Perovskite Crystals for Thin-Film Photovoltaic Applications

Lookup NU author(s): Dr Pablo Docampo

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This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Chemical Society, 2016.

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Abstract

Wide band gap perovskites such as methylammonium lead bromide are interesting materials for photovoltaic applications because of their potentially high open-circuit voltage. However, the fabrication of high-quality planar films has not been investigated in detail for this material. We report a new synthesis approach for the fabrication of bromide-based perovskite planar films based on the control of the deposition environment. We achieve dense layers with large and perfectly oriented crystallites 5-10 um in size. Our results show that large crystal sizes can be achieved only for smooth indium-doped tin oxide substrates, whereas lateral perovskite crystal growth is limited for the rougher fluorine-doped tin oxide substrates. We additionally correlate photocurrent and perovskite crystal properties in photovoltaic devices and find that this parameter is maximized for ordered systems, with internal quantum efficiencies approaching unity. Hence, our work not only gives a new pathway to tune morphology and crystal orientation but also demonstrates its importance for planar perovskite solar cells.


Publication metadata

Author(s): Giesbrecht N, Schlipf J, Oesinghaus L, Binek A, Bein T, Mueller-Buschbaum P, Docampo P

Publication type: Article

Publication status: Published

Journal: ACS Energy Letters

Year: 2016

Volume: 1

Pages: 150-154

Print publication date: 08/07/2016

Online publication date: 16/05/2016

Acceptance date: 16/05/2016

Date deposited: 31/05/2017

ISSN (electronic): 2380-8195

Publisher: American Chemical Society

URL: http://dx.doi.org/10.1021/acsenergylett.6b00050

DOI: 10.1021/acsenergylett.6b00050


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