Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP27)
Publication date: 22nd October 2026
At the nanoscale, the surface gains outsize significance. When materials are small enough, a majority of their atoms are exposed at the surface, making them reactive and sensitive to the environment. In colloidal semiconductor nanocrystals, this reactivity can be exploited to extract photogenerated charges for catalysis or artificial photosynthesis. Lead halide perovskite nanocrystals (LHP NCs) are a class of remarkably versatile colloidal quantum dots (QDs), processable in solution under mild conditions and highly tuneable by composition, morphology, and size. LHP NCs are known for their defect tolerance, a result of their labile, ionic lattice. While optically beneficial, this lability has consequences for their colloidal stability. To use LHP NCs for charge extraction, we must balance stabilization of the particles in solution with charge separation. We design a ligand with binding modes for best particle stabilization and moieties that can hybridize to the QD electronic states. We synthesize hole-extracting zwitterionic ligands as proof of principle that ligands can simultaneously stabilize LHP NCs while freeing photogenerated charges, taking a step towards their use in catalysis or artificial photosynthesis.
We present a first step towards accessing photogenerated charges in LHP NCs via a sacrificial moiety on a zwitterionic ligand. While extraction is hampered by ligand decomposition, we show near-total quenching of photoluminescence accompanied by an 83% charge transfer into the ligand. Future steps include stabilizing the hole-scavenging moiety, extending charge delocalization into the ligand tail, and extracting the electron as well as the hole. Careful ligand design can open the door to LHP use in polar solvents and dilute conditions, as well as charge extraction and manipulation for applications such as catalysis, artificial photosynthesis, and devices.
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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.
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