Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP27)
Publication date: 22nd October 2026
Solar energy is a clean and abundant renewable energy source, but its use is affected by changes in sunlight. Photoelectrochemical (PEC) technology can convert solar energy into hydrogen for energy storage. However, the oxygen evolution reaction (OER) in conventional water splitting involves a complex four-electron transfer process, which requires a high overpotential and has slow reaction kinetics. These limitations increase the overall operating voltage and reduce solar energy conversion efficiency.¹
In this study, the ascorbic acid oxidation reaction (AAOR) was used to replace OER and reduce the required anodic potential. AAOR was coupled with the hydrogen evolution reaction (HER) to develop a bias-free PEC hydrogen production system. The catalytic activity of different catalysts toward AAOR was studied, and a solar cell was combined with a commercial Pt/C catalyst to form a monolithic photocathode. Compared with conventional OER, AAOR can occur at a lower oxidation potential and convert ascorbic acid into the valuable product dehydroascorbic acid (DHA) through a two-electron oxidation reaction.²
The developed PEC system achieved a hydrogen Faradaic efficiency (FE) of over 90% and a DHA selectivity of over 90%. These results show that combining AAOR with HER can produce hydrogen and valuable chemicals at the same time without external electrical bias. This approach provides a promising way to reduce the energy required for PEC hydrogen production while using solar energy to produce valuable chemicals.
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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.