Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP27)
Publication date: 22nd October 2026
Mixed tin–lead (Sn–Pb) perovskites are promising low-bandgap absorbers for tandem photovoltaics, but their performance and stability remain limited by Sn oxidation, non-radiative recombination, and heterogeneous crystallization. In this presentation, I will discuss our approaches to addressing these challenges through interface and crystallization engineering. Tuning the hole-contact interface, including PEDOT de-doping and the use of tailored organic materials, reduces interfacial losses in Sn–Pb perovskite solar cells. We further examine how fullerene-based additives and thermal processing influence buried interfaces, film formation, and device stability.1 Building on these findings, we explore hole-transport-layer-free (HTL-free) Sn–Pb devices as a route to a simpler device architecture. By controlling crystallization and the contact between the perovskite and the underlying electrode, our HTL-free cells achieve efficiencies exceeding 20%.2 These results show that careful control of film formation and interfacial properties can reduce reliance on a conventional HTL while retaining strong photovoltaic performance. Together, this work offers design principles for efficient Sn–Pb devices and their integration into tandem solar cells.
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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.