Universität zu Köln

Uenlue, Feray, Jung, Eunhwan ORCID: 0000-0002-9326-6486, Haddad, Jinane ORCID: 0000-0003-3747-0412, Kulkarni, Ashish ORCID: 0000-0002-7945-208X, Oz, Senol, Choi, Heechae, Fischer, Thomas, Chakraborty, Sudip ORCID: 0000-0002-6765-2084, Kirchartz, Thomas and Mathur, Sanjay ORCID: 0000-0003-2765-2693 (2020). Understanding the interplay of stability and efficiency in A-site engineered lead halide perovskites. APL Mater., 8 (7). MELVILLE: AMER INST PHYSICS. ISSN 2166-532X

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Abstract

Organic-inorganic hybrid lead halide perovskites have gained significant attention as light-harvesting materials in thin-film photovoltaics due to their exceptional optoelectronic properties and simple fabrication process. The power conversion efficiency of perovskite solar cells (PSCs) has surged beyond 25% in a short time span. Their transition to commercial market is a work in progress due to limited long-term operational stability and the persisting environmental concern due to the presence of lead. Comprehensive investigations on the interplay of material composition and interfacial effects on the device performance of PSCs based on methylammonium lead iodide have shown the crucial role of an A-site cation in incipient deterioration of the material through external stimuli (moisture, light, oxygen, or heat). Consequently, a partial or complete replacement of A-site cations by up to four isoelectronic substituents has resulted in many new perovskite compositions. The correlations between the chemical composition and the optoelectronic properties are, however, not always easy to determine. A-site cation management is governed by stability and charge neutrality of the lattice, and the choices include Cs+-cations and organic cations such as CH(3)NH(3)(+)or CH(NH2)(2)(+)and combinations thereof. Since the size of the cations is an important structural parameter, an adequate compositional engineering of the A-site could effectively optimize the stability by reducing non-radiative defect sites and enhancing carrier lifetimes. This Perspective reflects on the experimental strategies for A-site cation management and their direct impact on the stability and device performance. It also highlights the opportunities and challenges for further research and industrial commercialization of PSCs.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Uenlue, Feray UNSPECIFIED UNSPECIFIED UNSPECIFIED Jung, Eunhwan UNSPECIFIED orcid.org/0000-0002-9326-6486 UNSPECIFIED Haddad, Jinane UNSPECIFIED orcid.org/0000-0003-3747-0412 UNSPECIFIED Kulkarni, Ashish UNSPECIFIED orcid.org/0000-0002-7945-208X UNSPECIFIED Oz, Senol UNSPECIFIED UNSPECIFIED UNSPECIFIED Choi, Heechae UNSPECIFIED UNSPECIFIED UNSPECIFIED Fischer, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Chakraborty, Sudip UNSPECIFIED orcid.org/0000-0002-6765-2084 UNSPECIFIED Kirchartz, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED orcid.org/0000-0003-2765-2693 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-327995
DOI:	10.1063/5.0011851
Journal or Publication Title:	APL Mater.
Volume:	8
Number:	7
Date:	2020
Publisher:	AMER INST PHYSICS
Place of Publication:	MELVILLE
ISSN:	2166-532X
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 SOLAR-CELLS; IODIDE PEROVSKITE; HIGHLY EFFICIENT; HYBRID PEROVSKITES; EFFECTIVE MASSES; METHYLAMMONIUM; PHASE; RUBIDIUM; FORMAMIDINIUM; GUANIDINIUM Multiple languages Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/32799