Cation Order & Disorder in Photovoltaic Hybrid Perovskites - The Need for Neutron Spectroscopy under Pressure
Since its first use as a sensitizer in 2009, MAPI has become one of the most promising materials for photovoltaics. Notwithstanding the ongoing `race' to develop new solar-energy technologies based on this class of organic-inorganic hybrid materials, access to the phase diagram of MAPI and the underlying structural and dynamical properties has not been a trivial task. Building upon a recent study using the TOSCA spectrometer at ISIS and detailed computational modelling at ambient pressure, this proposal seeks to provide new insights into the local structure and underlying motions of the organic cation in this important material. To this end, we propose to conduct INS experiments on LAGRANGE as a function of pressure across the phase transition associated with the onset of cation disorder. We believe that this work would pave the way for a detailed mapping of important regions of the phase diagram of MAPI that remain entirely unexplored, and where the interplay between cation disorder and function can be explored under controlled conditions, including the emergence of global disorder via amorphisation.
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The recommended format for citing this dataset in a research publication is in the following format:
FELIX FERNANDEZ-ALONSO; Balthasar Braunewell; DRUZBICKI Kacper; Mattia Gaboardi; IVANOV Alexandre; JIMENEZ RUIZ Monica and SADYKOV Ravil A.. (2021). Cation Order & Disorder in Photovoltaic Hybrid Perovskites - The Need for Neutron Spectroscopy under Pressure. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-04-177
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