Publication date: 17th February 2025
Perovskite thin films show excellent optoelectronic properties for next-generation solar cells. However, their long-term stability under operating conditions remains a critical challenge. We investigate the degradation mechanisms of Methylammonium Lead Iodide (MAPI) perovskite thin films, using AFM in controlled nitrogen atmospheres. Based on prior research on light-induced degradation in ambient conditions,1,2 this study isolates the role of light under controlled nitrogen environments.
We aimed to assess the degree to which the degradation caused by light alone differs in nitrogen compared to ambient conditions. Surface morphology, roughness, and any potential variations were compared across both conditions. MAPI thin films exposed to a controlled nitrogen environment exhibited negligible morphological changes under AFM analysis, both in darkness or under low light intensity. This is due to the absence of moisture and oxygen in the nitrogen environment, which contributes additionally to degradation. Thus, this approach facilitates the isolation of light-induced degradation from moisture and oxygen.
We observed a light intensity threshold, and a minimum exposure time required to initiate perovskite film degradation within a nitrogen environment. This suggests even in inert atmospheres, photochemical pathways remain active, albeit potentially slowed. To isolate the effects of light and other environmental factors, we quantify the degradation in ambient darkness and under illumination in nitrogen, exceeding the established threshold light intensity and time. This highlights the independent or synergistic contributions of light and other factors to perovskite film degradation, further validating nitrogen's protective role in enhancing solar cell longevity.
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.