Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP27)
Publication date: 22nd October 2026
In conventional solution-based approaches, SnO2 film formation and chemical composition are intrinsically coupled during deposition, making it difficult to control film morphology and defect formation independently. Here, we introduce a cation-exchange strategy that decouples these processes into sequential steps. A pre-formed ZnO film first defines the thickness and substrate coverage, followed by solution-phase exchange that replaces Zn with Sn while largely preserving the original morphology, yielding an approximately 13 nm-thick cation-exchanged SnO2 (ce-SnO2) layer. We demonstrate that the water content of the exchange solution critically determines how SnO2 forms at the film interface. This controlled conversion improves the electronic and interfacial properties of SnO2, facilitating faster electron transfer and longer carrier lifetimes in the overlying perovskite. Consequently, perovskite solar cells incorporating the optimized ce-SnO2 achieve a power conversion efficiency of 25.38% and an open-circuit voltage of 1.201 V, exceeding 1.20 V without any additional passivation of the buried perovskite/SnO2 interface. Beyond SnO2, this sequential control of the initial oxide film and its chemical conversion provides a versatile solution-based platform for engineering metal-oxide charge transport layers in optoelectronic devices.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
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.