Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)
Publication date: 30th March 2023
The fluctuating nature of renewable energy sources demands novel concepts bridging energy conversion and storage. The emerging field of solar batteries offers solutions that combine light absorption and electrical energy storage for subsequent use. In this talk, an overview of existing concepts is given, emphasizing on bifunctional materials, which can intrinsically combine light absorption and charge storage. They promise significantly reduced fabrication costs and device complexity of solar energy storage systems.
Operation of bifunctional materials relies on light induced redox-reactions in the photoabsorber material, being commonly assisted by ions from the environment. As such, different types of photo(de-)intercalation concepts can be exploited for bifunctional solar battery photo-anodes and -cathodes.[1] To date, most concepts rely on bifunctional half-cells only, which store counter-charges in an electrolyte. However, technologies more reminiscent of batteries with solid state electrodes are emerging. Of particular interest here is the carbon nitride poly(heptazine imide) or PHI, which can store electrons even in aqueous conditions, at potentials negative of the reversible hydrogen electrode. These properties were previously exploited for solar battery anode half cells,[2] for photocatalyic hydrogen production after irradiation,[3] for light charged microswimmers,[4] and even for photomemristive sensors,[5] that all rely on electron storage in PHI as half-cell only. By engineering a hole transfer cascade with an organic hole transport and separator material, and a hole storage material, the first full solar battery based on purely earth abundant polymeric materials is now reported.[6] While being inspired from organic solar cells, it can be charged purely by light or electrically – and discharged on demand. Different operation modes of such a device are highlighted and compared, which can increase the effective capacity by 243% if discharged under illumination. Finally, design considerations from modelling such devices are discussed, showing requirements and possibilities for optimizing photocharging kinetics or the battery capacity for the desired application scenario.
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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.