Universität zu Köln

Unlu, Feray ORCID: 0000-0001-7242-8020, Kulkarni, Ashish, Le, Khan, Bohr, Christoph ORCID: 0000-0002-8427-8346, Bliesener, Andrea, Oz, Seren Dilara, Jena, Ajay Kumar ORCID: 0000-0002-9279-5079, Ando, Yoichi, Miyasaka, Tsutomu, Kirchartz, Thomas ORCID: 0000-0002-6954-8213 and Mathur, Sanjay (2021). Single- or double A-site cations in A(3)Bi(2)I(9) bismuth perovskites: What is the suitable choice? J. Mater. Res., 36 (9). S. 1794 - 1805. HEIDELBERG: SPRINGER HEIDELBERG. ISSN 2044-5326

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Abstract

Investigations on the effect of single or double A-site cation engineering on the photovoltaic performance of bismuth perovskite-inspired materials (A(3)Bi(2)I(9)) are rare. Herein, we report novel single-and double-cation based bismuth perovskite-inspired materials developed by (1) completely replacing CH3NH3+ (methylammonium, MA(+)) in A(3)Bi(2)I(9) with various organic cations such as CH(NH2)(2)(+) (formamidinium, FA(+)), (CH3)(2)NH2+ (dimethylammonium, DMA(+)), C(NH2)(3)(+) (guanidinium, GA(+)) and inorganic cations such as cesium (Cs+), rubidium (Rb+), potassium (K+), sodium (Na+) and lithium (Li+) and (2) partially replacing MA(+) with Cs+ in different stoichiometric ratios. Compared to single-cation based bismuth perovskite devices, the double-cation bismuth perovskite device showed an increment in the device power conversion efficiency (PCE) up to 1.5% crediting to the reduction in the bandgap. This is the first study demonstrating double-cation based bismuth perovskite showing bandgap reduction and increment in device efficiency and opens up the possibilities towards compositional engineering for improved device performance.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Unlu, Feray UNSPECIFIED orcid.org/0000-0001-7242-8020 UNSPECIFIED Kulkarni, Ashish UNSPECIFIED UNSPECIFIED UNSPECIFIED Le, Khan UNSPECIFIED UNSPECIFIED UNSPECIFIED Bohr, Christoph UNSPECIFIED orcid.org/0000-0002-8427-8346 UNSPECIFIED Bliesener, Andrea UNSPECIFIED UNSPECIFIED UNSPECIFIED Oz, Seren Dilara UNSPECIFIED UNSPECIFIED UNSPECIFIED Jena, Ajay Kumar UNSPECIFIED orcid.org/0000-0002-9279-5079 UNSPECIFIED Ando, Yoichi UNSPECIFIED UNSPECIFIED UNSPECIFIED Miyasaka, Tsutomu UNSPECIFIED UNSPECIFIED UNSPECIFIED Kirchartz, Thomas UNSPECIFIED orcid.org/0000-0002-6954-8213 UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-589131
DOI:	10.1557/s43578-021-00155-z
Journal or Publication Title:	J. Mater. Res.
Volume:	36
Number:	9
Page Range:	S. 1794 - 1805
Date:	2021
Publisher:	SPRINGER HEIDELBERG
Place of Publication:	HEIDELBERG
ISSN:	2044-5326
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language Materials Science, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/58913