Publication date: 22nd July 2026
Halide perovskites are promising semiconductors for photovoltaics and other optoelectronic technologies, but their acute moisture sensitivity remains a major barrier to long-term operational stability. The earliest stages of water-induced degradation are especially difficult to resolve as they are confined to ultrathin surface layers and often produce disordered phases that evade diffraction-based structural probes. Here I'll discuss how we have exposed lead halide perovskites suitable for state-of-the-art perovskite photovoltaics and LEDs to 17O-enriched water vapor and used ultra-high-field solid-state 17O MAS NMR to identify the surface species formed during moisture-induced degradation. We find that water does not simply adsorb as isolated molecules but instead forms liquid-like interfacial nanofilms that act as both solvents and reactive media. These nanofilms selectively leach ions from perovskite surfaces and direct composition-dependent degradation pathways leading to hydrate, hydroxyhalide, hydroxide and oxide phase formation. These findings establish reactive water nanofilms as the key intermediate in moisture-driven degradation, map how degradation products evolve across the lead halide perovskite compositional space and provide clear design rules for moisture-stable perovskite photovoltaics and LEDs.
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.