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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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Jagadamma, Lethy Krishnan
University of St Andrews
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2024Metal oxide vs organic semiconductor charge extraction layers for halide perovskite indoor photovoltaics
- 2023Manipulation of structure and optoelectronic properties through bromine inclusion in a layered lead bromide perovskitecitations
- 2023Chlorine retention enables the indoor light harvesting of triple halide wide bandgap perovskitescitations
- 2023Lead-free perovskite-inspired semiconductors for indoor light-harvesting - the present and the futurecitations
- 2023Status report on emerging photovoltaicscitations
- 2022Crystalline grain engineered CsPbIBr2 films for indoor photovoltaicscitations
- 2022Solution-processable perylene diimide-based electron transport materials as non-fullerene alternatives for inverted perovskite solar cellscitations
- 2022Solution-processable perylene diimide-based electron transport materials as non-fullerene alternatives for inverted perovskite solar cellscitations
- 2022Hysteresis in hybrid perovskite indoor photovoltaicscitations
- 2021Organic photovoltaics for simultaneous energy harvesting and high-speed MIMO optical wireless communicationscitations
- 2021New thiophene-based conjugated macrocycles for optoelectronic applicationscitations
- 2021New thiophene-based conjugated macrocycles for optoelectronic applicationscitations
- 2019Efficient indoor pin hybrid perovskite solar cells using low temperature solution processed NiO as hole extraction layerscitations
- 2019Interface limited hole extraction from methylammonium lead iodide filmscitations
- 2017Charge carrier localised in zero-dimensional (CH3NH3)3Bi219 clusterscitations
- 2017Charge carrier localised in zero-dimensional (CH3NH3)3Bi2I9 clusterscitations
- 2017Novel 4,8-benzobisthiazole copolymers and their field-effect transistor and photovoltaic applicationscitations
- 2016Solution-processable MoO x nanocrystals enable highly efficient reflective and semitransparent polymer solar cellscitations
- 2016Solution-processable MoOx nanocrystals enable highly efficient reflective and semitransparent polymer solar cellscitations
- 2015Polymer solar cells with efficiency >10% enabled via a facile solution-processed Al-doped ZnO electron transporting layercitations
- 2015Polymer solar cells with efficiency >10% enabled via a facile solution-processed Al-doped ZnO electron transporting layercitations
Places of action
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article
Manipulation of structure and optoelectronic properties through bromine inclusion in a layered lead bromide perovskite
Abstract
One of the great advantages of organic–inorganic metal halides is that their structures and properties are highly tuneable and this is important when optimizing materials for photovoltaics or other optoelectronic devices. One of the most common and effective ways of tuning the electronic structure is through anion substitution. Here, we report the inclusion of bromine into the layered perovskite [H<sub>3</sub>N(CH<sub>2</sub>)<sub>6</sub>NH<sub>3</sub>]PbBr<sub>4</sub> to form [H<sub>3</sub>N(CH<sub>2</sub>)<sub>6</sub>NH<sub>3</sub>]PbBr<sub>4</sub>·Br<sub>2</sub>, which contains molecular bromine (Br<sub>2</sub>) intercalated between the layers of corner-sharing PbBr<sub>6</sub> octahedra. Bromine intercalation in [H<sub>3</sub>N(CH<sub>2</sub>)<sub>6</sub>NH<sub>3</sub>]PbBr<sub>4</sub>·Br<sub>2</sub> results in a decrease in the band gap of 0.85 eV and induces a structural transition from a Ruddlesden–Popper-like to Dion–Jacobson-like phase, while also changing the conformation of the amine. Electronic structure calculations show that Br<sub>2</sub> intercalation is accompanied by the formation of a new band in the electronic structure and a significant decrease in the effective masses of around two orders of magnitude. This is backed up by our resistivity measurements that show that [H<sub>3</sub>N(CH<sub>2</sub>)<sub>6</sub>NH<sub>3</sub>]PbBr<sub>4</sub>·Br<sub>2</sub> has a resistivity value of one order of magnitude lower than [H<sub>3</sub>N(CH<sub>2</sub>)<sub>6</sub>NH<sub>3</sub>]PbBr<sub>4</sub>, suggesting that bromine inclusion significantly increases the mobility and/or carrier concentration in the material. This work highlights the possibility of using molecular inclusion as an alternative tool to tune the electronic properties of layered organic–inorganic perovskites, while also being the first example of molecular bromine inclusion in a layered lead halide perovskite. By using a combination of crystallography and computation, we show that the key to this manipulation of the electronic structure is the formation of halogen bonds between the Br<sub>2</sub> and Br in the [PbBr<sub>4</sub>]<sub>∞</sub> layers, which is likely to have important effects in a range of organic–inorganic metal halides.