Journal Article

FZJ-2021-03133

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Single- or double A-site cations in A3Bi2I9 bismuth perovskites: What is the suitable choice?

Ünlü, F. ; Kulkarni, A.FZJ* ; Lê, K. ; Bohr, C. ; Bliesener, A. ; Öz, S. D. ; Jena, A. K. ; Ando, Y. ; Miyasaka, T. ; Kirchartz, T.FZJ* ; Mathur, S. (Corresponding author)

2021
Cambridge Univ. Press Cambridge [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/28367  doi:10.1557/s43578-021-00155-z

Abstract: Investigations on the effect of single or double A-site cation engineering on the photovoltaic performance of bismuth perovskite-inspired materials (A3Bi2I9) are rare. Herein, we report novel single- and double-cation based bismuth perovskite-inspired materials developed by (1) completely replacing CH3NH3+ (methylammonium, MA+) in MA3Bi2I9 with various organic cations such as CH(NH2)2+ (formamidinium, FA+), (CH3)2NH2+ (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.

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Contributing Institute(s):

1. Photovoltaik (IEK-5)

Research Program(s):

1. 1212 - Materials and Interfaces (POF4-121) (POF4-121)

Appears in the scientific report 2021

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Database coverage:
; ; Allianz-Lizenz / DFG ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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