Universität zu Köln

Tsarev, Sergey ORCID: 0000-0001-7634-1088, Olthof, Selina, Boldyreva, Aleksandra G., Aldoshin, Sergey M., Stevenson, Keith J. and Troshin, Pavel A. (2021). Reactive modification of zinc oxide with methylammonium iodide boosts the operational stability of perovskite solar cells. Nano Energy, 83. AMSTERDAM: ELSEVIER. ISSN 2211-3282

Full text not available from this repository.

Abstract

Low operational stability of perovskite solar cells represents a major obstacle for practical implementation of this technology. In that context, ZnO was considered as a promising electron transport material with suppressed oxidizing properties as compared to SnO2 and TiO2. However, the first studies revealed the chemical instability of the interface between lead halide perovskites and zinc oxide, whereas the underlying reasons are still under active debates. Still, the interfacial instability issues made ZnO a largely overlooked electron transport layer despite its excellent optoelectronic properties. This study presents a novel approach to the zinc oxide surface modification with methylammonium iodide that suppresses further reactions with the adjacent perovskite absorber layer. Consequently, the solar cells based on CH3NH3PbI3 exhibited largely improved thermal stability. Furthermore, the application of Cs0.12[HC(NH2)2]0.88PbI3 as absorber material in devices with the modified ZnO electron transport layer resulted in 82% retention of the initial efficiency after aging for 2100 h at 50 mW cm-2 and 65 ?C. On the contrary, the reference cells fabricated with the pristine non-modified ZnO degraded completely under the same conditions. We attribute the revealed stabilization effect of the methylammonium iodide treatment to passivation of the reactive ZnO surface and inhibiting the parasitic interfacial chemistry leading to the lead iodide formation. To our best knowledge, here we have demonstrated the highest operational stability for the perovskite cells when using ZnO-based ETL.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Tsarev, Sergey UNSPECIFIED orcid.org/0000-0001-7634-1088 UNSPECIFIED Olthof, Selina UNSPECIFIED UNSPECIFIED UNSPECIFIED Boldyreva, Aleksandra G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Aldoshin, Sergey M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stevenson, Keith J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Troshin, Pavel A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-582257
DOI:	10.1016/j.nanoen.2021.105774
Journal or Publication Title:	Nano Energy
Volume:	83
Date:	2021
Publisher:	ELSEVIER
Place of Publication:	AMSTERDAM
ISSN:	2211-3282
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language EFFICIENT; LAYER; INTERFACE; FILMS; INSTABILITY; TIO2; COST Multiple languages Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/58225