ISIS Neutron and Muon Source Data Journal

Reciprocal space imaging of acoustic and optical phonons in methylammonium lead iodide

Abstract: Hybrid organic-inorganic metal halide perovskites (HOIPs) are a class of materials that have potential use as high-efficiency solar absorbers. These materials can be synthesized with a small organic cation on the A site; greatly affecting the lattice dynamics. Currently, there are no published dispersions of the optical phonons, which have been proposed to affect carrier thermalization due to formation of a "hot phonon bottleneck". Theoretical studies have proposed that the optical phonons lose their wavevector dependence to become diffusons. We propose to use the multi-rep rate option of the MERLIN instrument to map out the acoustic and optical phonons in methylammonium lead iodide with high energy resolution. This will help elucidate the character of the optical phonons and their effect on optoelectronic properties.

Principal Investigator: Dr Nicholas Weadock
Experimenter: Dr Michael Toney
Experimenter: Professor Aron Walsh
Local Contact: Dr David Voneshen
Experimenter: Dr Peter Gehring
Experimenter: Dr Dmitry Reznik
Experimenter: Mr Tyler Sterling

DOI: 10.5286/ISIS.E.RB2010431

ISIS Experiment Number: RB2010431

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
Select the data format above to find out more about it.

Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Nicholas Weadock et al; (2020): Reciprocal space imaging of acoustic and optical phonons in methylammonium lead iodide, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2010431

Data is released under the CC-BY-4.0 license.