Publication date: 17th February 2025
Mesoporous carbon-based (mC) hole-transporting-layer-free architectures offer a cost-effective solution for the commercialization of perovskite solar cells (PSCs). Adding 5-aminovaleric acid (AVA) to MAPbI3 reduces defect concentration and enhances pore filling, while Eu enrichment in CsPbI3 reduces cation migration and enables device reusability [1].
In this study, AVA-MAPbI3 mC-PSCs were encapsulated at room temperature (RT) with a solvent- and water-free polyurethane (PU) resin [2]. Under continuous ambient light, RT, and 40% relative humidity (RH), PU encapsulant acts as a barrier to extend device durability and enable reusability. The formation of a bump in the J-V curve after ~250 h, already reported at low scan-rate but here observed at 50 mV/s, strongly reduces the photovoltaic performances. We demonstrate that the bump is not linked to the formation of PbI2 but is explained by a water-vacancy interaction that increases cation mobility and enhances screening effects near the electron-transport layer. The photovoltaic performances are fully restored by drying the devices under N2 flow for ~48 hours.
A further addition of a hydrophobic Kapton tape interlayer between the PU and the device mitigates bump formation, boosts t90 to ~6000 h and projects t80 to ~10,800 h. Differently from the Kapton tape used alone, PU provides an effective sealing all around the devices, ensuring stability in 100% RH at 90 °C and even underwater.
For indoor applications, Eu:CsPbI3 mC-PSCs typically degrade from γ- to δ-phase within ~1 h in air, whereas PU-encapsulated devices achieve t80 ~250 h, extendable to 1250 h with an additional closure glass slide[3].
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.