Kinetics vs. Thermodynamics—Pathways to Improving the Stability of Halide Perovskites

Since the first demonstration of efficient halide perovskite solar cells, there has been sustained and growing research interest in this class of materials. With facile deposition processes and excellent optoelectronic properties, these materials have found applications not only in photovoltaics, but in a myriad of optoelectronic devices. While research into halide perovskites for light emission and X-ray detection is just beginning to surge, perovskites are most well known for their remarkable PV performance, achieving certified power conversion efficiencies over 26% in single junction devices. Despite their truly impressive device performance, these materials have not yet reached their true potential. One potential hurdle to this is an incomplete understanding of the crystallisation dynamics and interfaces in halide perovskite thin-films, which can result in marked changes to the long-term stability and performance of these devices. In this talk, I will discuss kinetic approaches to fabricating improved stability halide perovskite thin-films and devices of a variety of bandgaps. Importantly, I will discuss how utilising various kinetic pathways enable us to stabilise conventionally thermodyamically unstable phases, opening new pathways to perovskite-based tandem devices.