Universität zu Köln

Liu, Zhifa ORCID: 0000-0003-1068-4867, Krueckemeier, Lisa, Krogmeier, Benedikt ORCID: 0000-0002-3523-4451, Klingebiel, Benjamin, Marquez, Jose A., Levcenko, Sergiu, Oez, Senol, Mathur, Sanjay ORCID: 0000-0003-2765-2693, Rau, Uwe ORCID: 0000-0003-3526-3081, Unold, Thomas and Kirchartz, Thomas ORCID: 0000-0002-6954-8213 (2019). Open-Circuit Voltages Exceeding 1.26 V in Planar Methylammonium Lead Iodide Perovskite Solar Cells. ACS Energy Lett., 4 (1). S. 110 - 125. WASHINGTON: AMER CHEMICAL SOC. ISSN 2380-8195

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Abstract

We demonstrate open-circuit voltages exceeding 1.26 V for inverted planar CH3NH3PbI3 solar cells fabricated using a combination of lead acetate and PbCl2 precursors leading to smooth films and large grain sizes. Surface recombination is suppressed by careful optimization of the PTAA hole transport and PCBM electron transport layers. Suppression of bulk and surface recombination is verified by absolute photoluminescence measurements with external quantum efficiencies of similar to 5% in complete cells. In addition, we find exceptionally long photoluminescence lifetimes in full cells and in layer stacks involving one or two contact layers. Numerical simulations reveal that these long photoluminescence lifetimes are only possible with extremely low recombination velocities at the interfaces between absorber and contact materials.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Liu, Zhifa UNSPECIFIED orcid.org/0000-0003-1068-4867 UNSPECIFIED Krueckemeier, Lisa UNSPECIFIED UNSPECIFIED UNSPECIFIED Krogmeier, Benedikt UNSPECIFIED orcid.org/0000-0002-3523-4451 UNSPECIFIED Klingebiel, Benjamin UNSPECIFIED UNSPECIFIED UNSPECIFIED Marquez, Jose A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Levcenko, Sergiu UNSPECIFIED UNSPECIFIED UNSPECIFIED Oez, Senol UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED orcid.org/0000-0003-2765-2693 UNSPECIFIED Rau, Uwe UNSPECIFIED orcid.org/0000-0003-3526-3081 UNSPECIFIED Unold, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Kirchartz, Thomas UNSPECIFIED orcid.org/0000-0002-6954-8213 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-140020
DOI:	10.1021/acsenergylett.8b01906
Journal or Publication Title:	ACS Energy Lett.
Volume:	4
Number:	1
Page Range:	S. 110 - 125
Date:	2019
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	2380-8195
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language EFFICIENT; LUMINESCENCE; FILMS; LIFETIMES Multiple languages Chemistry, Physical; Electrochemistry; Energy & Fuels; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14002