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:
CreatorsEmailORCIDORCID Put Code
Unlu, FerayUNSPECIFIEDorcid.org/0000-0001-7242-8020UNSPECIFIED
Kulkarni, AshishUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Le, KhanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bohr, ChristophUNSPECIFIEDorcid.org/0000-0002-8427-8346UNSPECIFIED
Bliesener, AndreaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Oz, Seren DilaraUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jena, Ajay KumarUNSPECIFIEDorcid.org/0000-0002-9279-5079UNSPECIFIED
Ando, YoichiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Miyasaka, TsutomuUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kirchartz, ThomasUNSPECIFIEDorcid.org/0000-0002-6954-8213UNSPECIFIED
Mathur, SanjayUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
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:
KeywordsLanguage
Materials Science, MultidisciplinaryMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/58913

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