Data for: Unraveling the Electronic Control of Hydride Diffusivity in Oxyhydrides from Model Studies on BaTiO3−xHy

Hybrid organic-inorganic perovskites (HOIPs) are currently accumulating considerable interest because of their photoelectric and luminescent properties and concomitant promise for use in solar cells and light emitting diodes.One common property, linking the performance of these devices is a high radiative efficiency, but non-radiative losses due to thermal quenching of luminescence, in which the radiative efficiency decreases with increasing temperature, hinder the application of HOIPs in practical devices. Hybrid organic-inorganic perovskites (HOIPs) are currently accumulating considerable interest because of their photoelectric and luminescent properties and concomitant promise for use in solar cells and light emitting diodes. One common property, linking the performance of these devices is a high radiative efficiency, but non-radiative losses due to thermal quenching of luminescence, in which the radiative efficiency decreases with increasing temperature, hinder the application of HOIPs in practical devices. The development of new, better performing materials depends on a better understanding of the underlying mechanisms causing this unwanted behavior. Recent work points toward the importance of organic cation dynamics. However, previous studies in relation to organic cation dynamics is limited to only very few HOIPs, wherefore there is a clear gap of fundamental understanding pertaining to the general behavior of organic cation dynamics in these materials. My proposal is to provide a crucial contribution to this problem by unravelling the nature of organic cation dynamics in a set of prototypical HOIP materials and, especially, how it is linked to thermal quenching of luminescence. The primary tools to this end involve the use of advanced neutron scattering and optical characterization techniques. The project is intended for the period 2022-01-01 - 2025-12-31 and is based on the collaboration between myself, one new doctoral student, and colleagues in Italy and the U.K.

Fuel cells of different types offer different advantages but also bring different disadvantages. The benefits include flexibility for different energy carriers, and that it can enable a completely renewable energy system. Some of the disadvantages are that noble metals are required for catalysis at low temperatures <90 degrees Celsius, but at high temperatures > 800 degrees Celsius, problems with sealing or corrosion occur. This project aims to study proton conductors for fuel cells that should have an estimated working temperature of 200-500 degrees Celcius, which means an intermediate stage between low and high temperatures which could in the long term enable easier implementation of this technology in the automotive sector, among other things. The project is expected to be able to contribute strongly to a flexible and robust, as well as completely renewable, energy system.