Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP27)
Publication date: 22nd October 2026
Interfaces largely determine the efficiency, voltage, and operational stability of organic and perovskite solar cells, and these challenges intensify in the interconnection layers of monolithic tandems where interfacial losses directly limit overall efficiency and reliability. In this talk, I present an epitaxy‑mimicking, molecularly matched interface strategy based on tailored self‑assembled monolayers (SAMs) that are designed to create programmable supramolecular interactions with the adjacent active layer in organic[1], perovskite [2-3], and their tandem solar cells[4] (Figure 1). By incorporating specific noncovalent binding motifs and interfacial dipoles, these SAMs (i) strengthen electronic coupling across the contact to accelerate interfacial charge transfer and reduce extraction losses, (ii) increase interfacial adhesion to suppress delamination and defect generation during operation, and (iii) tune interfacial energetics to optimize energy‑level alignment, charge selectivity, and defect passivation. Crucially, SAM/active‑layer interactions also provide handles to control interfacial stress and direct morphology evolution (nucleation, orientation, phase distribution), mitigating nonradiative recombination and improving robustness. I will highlight how this approach enables simultaneous gains in efficiency and stability in single‑junction devices and how it translates to organic/perovskite monolithic tandems, where molecular control at the recombination junction promotes efficient interconnection, minimizes voltage losses, and improves long‑term tandem reliability.
This work was supported by the Research Grants Council of the Hong Kong Special Administrative Region, China (RGC Senior Research Fellow Scheme: SRFS 2526-1S04; General Research Fund: 11303626; NSFC/RGC Collaborative Research Scheme: CRS_CityU104/23), and the Innovation and Technology Commission of Hong Kong (ITF Grant: MHP/230/24).
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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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