Universität zu Köln

Oz, Senol, Hebig, Jan-Christoph, Jung, Eunhwan, Singh, Trilok ORCID: 0000-0003-2322-7403, Lepcha, Ashish, Olthof, Selina ORCID: 0000-0002-8871-1549, Flohre, Jan, Gao, Yajun, German, Raphael, van Loosdrecht, Paul H. M., Meerholz, Klaus, Kirchartz, Thomas ORCID: 0000-0002-6954-8213 and Mathur, Sanjay (2016). Zero-dimensional (CH3NH3)(3)Bi2I9 perovskite for optoelectronic applications. Sol. Energy Mater. Sol. Cells, 158. S. 195 - 202. AMSTERDAM: ELSEVIER. ISSN 1879-3398

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Abstract

We present the preparation and characterization of solution processed lead free films of zero dimensional methylammonium iodo bismuthate (CH3NH3)(3)Bi2I9 perovskite. Structural characterization reveals the formation of hexagonal micro-crystals with preferred growth orientation along the c-axis. The material exhibits a wide band gap of 2.9 eV and upon optical excitation the photoluminescence emission is observed at 1.65 eV (751 nm). Photoelectron spectroscopy confirms the stoichiometry of the (CH3NH3)(3)Bi2I9 perovskite and yields an ionization energy of 6.24 eV, while Raman spectra confirm the vibrational modes of the bioctahedral inorganic anion framework (Bi2I9)(3-) in the low wavenumber regime (< 200 cm(-1)) regime. Density Functional Theory (DFT) and Time-Dependent Density Functional Theory (TDDFT) are employed to evaluate the experimental results. We apply this novel bismuth-based hybrid perovskite in proof of principle simple heterojunction solar cell devices, which yield power conversion efficiencies of similar to 0.1%. Further enhancement is expected once the film morphology and device stack are optimized. (C) 2016 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Oz, Senol UNSPECIFIED UNSPECIFIED UNSPECIFIED Hebig, Jan-Christoph UNSPECIFIED UNSPECIFIED UNSPECIFIED Jung, Eunhwan UNSPECIFIED UNSPECIFIED UNSPECIFIED Singh, Trilok UNSPECIFIED orcid.org/0000-0003-2322-7403 UNSPECIFIED Lepcha, Ashish UNSPECIFIED UNSPECIFIED UNSPECIFIED Olthof, Selina UNSPECIFIED orcid.org/0000-0002-8871-1549 UNSPECIFIED Flohre, Jan UNSPECIFIED UNSPECIFIED UNSPECIFIED Gao, Yajun UNSPECIFIED UNSPECIFIED UNSPECIFIED German, Raphael UNSPECIFIED UNSPECIFIED UNSPECIFIED van Loosdrecht, Paul H. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Meerholz, Klaus UNSPECIFIED UNSPECIFIED UNSPECIFIED Kirchartz, Thomas UNSPECIFIED orcid.org/0000-0002-6954-8213 UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-255272
DOI:	10.1016/j.solmat.2016.01.035
Journal or Publication Title:	Sol. Energy Mater. Sol. Cells
Volume:	158
Page Range:	S. 195 - 202
Date:	2016
Publisher:	ELSEVIER
Place of Publication:	AMSTERDAM
ISSN:	1879-3398
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 HALIDE PEROVSKITES; OPTICAL-PROPERTIES; SOLAR-CELLS; ABSORPTION; EFFICIENCY; METAL Multiple languages Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/25527