Study of lattice dynamics in the lead-free hybrid perovskite CH3NH3BaCl3
We propose to investigate the lattice dynamics in a new lead-free organic-inorganic halide perovskite, CH3NH3BaCl3. Previous study on the lead variant has shown a strong damping of the transverse acoustic phonon modes towards the X and M Brillouin zone boundaries at 300K, due to the coupling to the disordered molecular cation. Such damping is responsible for the ultra-low thermal conductivity observed in these systems. We would like to investigate the lattice dynamics in a lead-free variant, CH3NH3BaCl3, in order to establish wether these new materials present similar behaviour. These systems have attracted attention recently, in the context of developing lead-free photovoltaic materials with enhanced efficiencies. We request 7 days on IN22 to map out the transverse acoustic phonons in the (HK0) scattering plane.
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SONGVILAY Manila; SCHMALZL Karin and STOCK Christopher. (2021). Study of lattice dynamics in the lead-free hybrid perovskite CH3NH3BaCl3. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-01-523
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