Publication date: 27th March 2025
The energy crisis and climate change are among the most pressing challenges facing society today. To address the global warming caused by human activities, it is essential to transition from fossil fuels to clean, renewable energy sources like solar and wind. (Photo)electrocatalysis is considered as a promising technology to decarbonize key sectors as energy, industry and transport, providing sustainable energy vectors and added-value chemicals, with low environmental impact. In the present talk, we will focus on BiVO4 photoanodes, which is a very attractive materials for photoelectrochemical oxidation, given its relatively Earth-abundant constituent elements, robust stability, favorable band structure for efficient charge separation and low processing cost. Yet it suffers from slow reaction rates for water oxidation, rapid recombination of photo-generated electron-hole pairs, coupled with poor charge carrier mobility and short diffusion lengths (~70 nm) of the carriers optical properties.
With this overall context, we will discuss on recent studies at our lab, aimed at maximizing the performance of this material by different heterostructing strategies, like deposition of organic hole transport layers and catalytic materials, which lead to excellent photoactivity and stability. Furthermore, scalable solutions can be obtained by using a flow-synthetic approach, achieving photoelectrode sizes of 50 cm2, which achieve state-of-the-art performance. A central focus of our work is the fundamental understanding of the processes that govern device operation, and we will show how we approach carrier dynamics by a comprehensive suite of spectroscopic tools to probe the underlying operation mechanisms.
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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.
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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.
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