| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Payne, Julia Louise
University of St Andrews
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2023Manipulation of structure and optoelectronic properties through bromine inclusion in a layered lead bromide perovskitecitations
- 2022Synthesis, structure and tunability of zero dimensional organic-inorganic metal halides utilising the m-xylylenediammonium cation: MXD2PbI6, MXDBiI5, and MXD3Bi2Br12·2H2Ocitations
- 2021Time-resolved in-situ X-ray diffraction study of CaO and CaO:Ca3Al2O6 composite catalysts for biodiesel productioncitations
- 2021Use of interplay between A-site non-stoichiometry and hydroxide doping to deliver novel proton-conducting perovskite oxidescitations
- 2020Bandgap bowing in a zero-dimensional hybrid halide perovskite derivativecitations
- 2018Transition metal chlorides NiCl2, KNiCl3, Li6VCl8 and Li2MnCl4 as alternative cathode materials in primary Li thermal batteriescitations
- 2017Charge carrier localised in zero-dimensional (CH 3 NH 3 ) 3 Bi 2 1 9 clusterscitations
- 2017Charge carrier localised in zero-dimensional (CH3NH3)3Bi219 clusterscitations
- 2017Charge carrier localised in zero-dimensional (CH3NH3)3Bi219 clusterscitations
- 2017Synthesis and electrochemical study of CoNi2S4 as a novel cathode material in a primary Li thermal batterycitations
- 2016Zirconium trisulfide as a promising cathode material for Li primary thermal batteriescitations
Places of action
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article
Bandgap bowing in a zero-dimensional hybrid halide perovskite derivative
Abstract
<p>We have considered a zero-dimensional hybrid halide perovskite derivative system, namely MA<sub>3</sub>(Sb<sub>1-x</sub>Bi<sub>x</sub>)<sub>2</sub>I<sub>9</sub>, to study the bandgap dependence on metal substitution. Similar to tin-lead mixed halide perovskites (MASn<sub>1-x</sub>Pb<sub>x</sub>I<sub>3</sub>), the composition dependence of the optical bandgap in the MA<sub>3</sub>(Sb<sub>1-x</sub>Bi<sub>x</sub>)<sub>2</sub>I<sub>9</sub> solid-state alloys showed evidence of a quadratic (bow-like) behavior where an intermediate compound containing an equimolar contribution of antimony and bismuth, MA<sub>3</sub>(Sb<sub>0.5</sub>Bi<sub>0.5</sub>)<sub>2</sub>I<sub>9</sub> offered the narrowest bandgap of around 1.90 eV; this is markedly lower than the bandgap of the end members MA<sub>3</sub>Sb<sub>2</sub>I<sub>9</sub> (2.36 eV) and MA<sub>3</sub>Bi<sub>2</sub>I<sub>9</sub> (2.16 eV). In addition, we have observed the bowing in the transport gap of MA<sub>3</sub>(Sb<sub>1-x</sub>Bi<sub>x</sub>)<sub>2</sub>I<sub>9</sub> that has been derived from scanning tunneling spectroscopy and density of states spectra thereof. To explain the underlying mechanism, we speculate that an antagonism between spin orbit coupling and its competing component, namely lattice strain, may have led to this bow-like nature in both optical and transport gaps. The band-diagram of heterojunctions based on MA<sub>3</sub>(Sb<sub>1-x</sub>Bi<sub>x</sub>)<sub>2</sub>I<sub>9</sub> accordingly depended on the metal-composition; solar cell characteristics of the heterojunctions followed the change in the bandgap, morphology, and also the exciton binding energy.</p>