Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
DOI: https://doi.org/10.29363/nanoge.hopv.2022.281
Publication date: 20th April 2022
Lead halide perovskites have recently emerged as a new class of semiconductor materials with exceptional properties. Their bandgaps can be tuned simply by adjusting their composition, in particular their halide ratio. Unfortunately, light-induced phase segregation is readily observed in mixed-halide perovskites, resulting in a material with inhomogeneous composition and optoelectronic properties on the nanoscale. We studied light-induced phase segregation in single-crystalline platelets, revealing that photoinduced phase-segregation occurs even in absence of grain-boundaries. Surprisingly, the cause, which induces phase-segregation to occur, light, can also be employed to reverse phase-segregation and cause halide-remixing. We show this effect in mixed-halide single-crystalline lead halide perovskite platelets and present a polaron-based two-dimensional lattice model to rationalise our findings [1]. The photoinduced complete reversal of halide-ion segregation under sufficiently high photon fluxes opens opportunities for the future usage of these materials in high power applications such as concentrator solar cells and high-power light-emissive devices.
This work was financially supported by the Australian Research Council through the Centre of Excellence in Exciton Science (CE170100026) and additional grants (DP160104575, LE170100235). We acknowledge financial support from the Australian Government through the Australian Renewable Energy Agency and the Australian Centre for Advanced Photovoltaics (ACAP). W.M. acknowledges an ACAP fellowship supported by the Australian Government through the Australian Renewable Energy Agency (ARENA).
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
The science and technology of advanced materials is a major resource of humanity to tackle global challenges. The Materials for Sustainable Development Conference is a forum for directing the knowledge and tools of science and technology of advanced materials to the areas and problems that contribute to the societal change.
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.