Publication date: 22nd July 2026
Formamidinium-based metal halide perovskites have emerged as leading candidates for next-generation photovoltaic technologies due to their exceptional optoelectronic properties and compositional tunability, allowing them to be applied to both single- and multijunction devices. Despite this progress, their rich structural landscape presents significant challenges, with multiple competing crystalline phases often coexisting in device-relevant thin films, where the presence of the lower symmetry polymorphs is often regarded as detrimental to device performance.
In this presentation, I will discuss our recent work exploring the relationship between crystal structure and optoelectronic behaviour in FA-based perovskites. In particular, I will demonstrate how composition and crystallisation kinetics can be used to manipulate structural complexity, providing new insight into the origin of unusual optical signatures that have recently been linked to reduced photovoltaic performance. I will also present emerging strategies for controlling phase formation across challenging compositional regimes, highlighting opportunities to both suppress performance-limiting structural motifs and exploit them to access new nanoscale optoelectronic phenomena. Overall, these investigations demonstrate how understanding and controlling polymorphism provides a powerful framework for engineering the structure–property relationships of metal halide perovskites, with potential implications extending beyond photovoltaics to emerging quantum and photonic applications.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.