Universität zu Köln

Olthof, Selina ORCID: 0000-0002-8871-1549, Marszalek, Magdalena, Peukert, Andreas, Muscarella, Loreta A. ORCID: 0000-0002-0559-4085, Ehrler, Bruno, Vukovic, Olivera, Galagan, Yulia ORCID: 0000-0002-3637-5459, Boehme, Simon Christian and von Hauff, Elizabeth ORCID: 0000-0002-6269-0540 (2019). Control of Surface Defects in ZnO Nanorod Arrays with Thermally Deposited Au Nanoparticles for Perovskite Photovoltaics. ACS Appl. Energ. Mater., 2 (5). S. 3736 - 3761. WASHINGTON: AMER CHEMICAL SOC. ISSN 2574-0962

Full text not available from this repository.

Abstract

In this work, we employ vacuum deposited Au nanoparticles (similar to 4 nm) to control the defect density on the surface of hydrothermally synthesized ZnO nanorod arrays (ZnO-NR), which are of interest for electron-transport layers in perovskite solar cells. Using a combination of photoluminescence spectroscopy, X-ray photoelectron spectroscopy, and ultraviolet photoelectron spectroscopy, we show that the Au particles reduce the presence of defects in the ZnO-NR We discuss this in terms of trap filling due to band bending at the ZnO-NR surface. As a proof-of-concept, we apply the Au-decorated ZnO-NR as electron-transport layers in mixed-cation and mixed-halide lead perovskite solar cells (Cs(0.15)FA(0.85)PbI(2.75)Br(0.25)). Devices prepared with the Au-decorated ZnO-NR electron-transport layers demonstrate higher open-circuit voltages and fill factors compared to solar cells prepared with pristine ZnO-NR, resulting in an increase in the power-conversion efficiency from 11.7 to 13.7%. However, the operational stability of the solar cells is not improved by the Au nanoparticles, indicating that bulk properties of the perovskite may limit device lifetime.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Olthof, Selina UNSPECIFIED orcid.org/0000-0002-8871-1549 UNSPECIFIED Marszalek, Magdalena UNSPECIFIED UNSPECIFIED UNSPECIFIED Peukert, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Muscarella, Loreta A. UNSPECIFIED orcid.org/0000-0002-0559-4085 UNSPECIFIED Ehrler, Bruno UNSPECIFIED UNSPECIFIED UNSPECIFIED Vukovic, Olivera UNSPECIFIED UNSPECIFIED UNSPECIFIED Galagan, Yulia UNSPECIFIED orcid.org/0000-0002-3637-5459 UNSPECIFIED Boehme, Simon Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED von Hauff, Elizabeth UNSPECIFIED orcid.org/0000-0002-6269-0540 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-149157
DOI:	10.1021/acsaem.9b00452
Journal or Publication Title:	ACS Appl. Energ. Mater.
Volume:	2
Number:	5
Page Range:	S. 3736 - 3761
Date:	2019
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	2574-0962
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Physical Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SOLAR-CELLS; GOLD NANOPARTICLES; HALIDE PEROVSKITES; RECENT PROGRESS; EFFICIENT; TRANSPORT; LAYERS; PHOTOLUMINESCENCE; RECOMBINATION; LUMINESCENCE Multiple languages Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14915