Speaker
Description
In order to make eco-friendly energy sources more widely available, there is an interest in manufacturing more efficient solar cells. This can be done by finding appropriate abundant materials that require less intensive production and typically at a lower cost. For this purpose, lead halide perovskites (APbX$_3$, A is an alkyl ammonium cation and X is a halide ion) have been researched recently and already show a lot of promise. As well as being easier to make, lead halide perovskite solar cells have shown power conversion efficiencies on the same level as conventional silicon-based cells. However, in order to avoid the toxic effects of lead, materials with similar structures are being sought out with comparable properties. Double perovskites, such as Cs$_2$AgBiCl$_6$ and Cs$_2$AgBiBr$_6$ are materials that have structures with similar perovskite cages and band gaps that are suited for indoor photovoltaic applications. In this talk I will present some results from studying these materials using $\mu$SR. This includes evidence for the formation of muonium, and insights from longitudinal field experiments into the muonium formed and associated charge dynamics.
| cac42@sfu.ca | |
| Supervisors Name | Sarah Dunsiger |
| Supervisors Email | dunsiger@triumf.ca |
