| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Wilson, Chick C.
University of Bath
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2020Phase behavior and substitution limit of mixed cesium-formamidinium lead triiodide perovskitescitations
- 2014Determining hydrogen positions in crystal engineered organic molecular complexes by joint neutron powder and single crystal X-ray diffractioncitations
- 2012Probing hydrogen positions in hydrous compounds:information from parametric neutron powder diffraction studiescitations
- 2012Probing hydrogen positions in hydrous compoundscitations
- 2010Structural isotope effects in metal hydrides and deuteridescitations
- 2010The kinetics of bulk hydration of the disaccharides α-lactose and trehalose by in situ neutron powder diffractioncitations
- 2009Crystallography of hydrogen-containing compoundscitations
- 2009Crystallography of hydrogen-containing compounds: realizing the potential of neutron powder diffractioncitations
- 2009In situ neutron powder diffraction and structure determination in controlled humiditiescitations
- 2002Variable temperature powder neutron diffraction study of SmNiO3 through its M-I transition using a combination of samarium and nickel isotopic substitutioncitations
Places of action
| Organizations | Location | People |
|---|
article
Phase behavior and substitution limit of mixed cesium-formamidinium lead triiodide perovskites
Abstract
The mixed cation lead iodide perovskite photovoltaics show improved stability following site substitution of cesium ions (Cs+) onto the formamidinium cation sites (FA+) of (CH(NH2)2PbI3 (FAPbI3) and increased resistance to formation of the undesirable ∂-phase. The structural phase behavior of Cs0.1FA0.9PbI3 has been investigated by neutron powder diffraction (NPD), complemented by single crystal and power X-ray diffraction and photoluminescence spectroscopy. The Cs-substitution limit has been determined to be less than 15%, and the cubic α-phase, Cs0.1FA0.9PbI3, is shown to be synthesizable in bulk and stable at 300 K. On cooling the cubic Cs0.1FA0.9PbI3, a slow, second-order cubic to tetragonal transition is observed close to 290 K, with variable temperature NPD indicating the presence of the tetragonal β-phase, adopting the space group P4/mbm between 290 and 180 K. An orthorhombic phase or twinned tetragonal phase is formed below 180 K, and the temperature for further transition to a disordered state is lowered to 125 K compared to that seen in phase pure α-FAPbI3 (140 K). These results demonstrate the importance of understanding the effect of cation site substitution on structure–property relationships in perovskite materials.