Proceedings of nanoGe Fall Meeting 2018 (NFM18)
DOI: https://doi.org/10.29363/nanoge.nfm.2018.136
Publication date: 6th July 2018
Experimental and theoretical studies show that the presence of mobile ions in perovskite solar cells (PSCs) modifies the electronic operation of the device [1-3]. The effects of the ion migration on the PSC performance can be enhanced or attenuated with the selective contacts (charge-transport-layer /perovskite heterojunctions) [2]. Thus, the knowledge of the mechanisms that take place at the selective contacts is crucial for the optimization of PSCs.
Anomalous high values of the low-frequency capacitance at open-circuit (OC) and short-circuit (SC) indicate a high accumulation of charge at the heterojunctions, which could hinder the extraction of charge and increase hysteresis in current-voltage curves [2]. This accumulation of charge can be affected by the presence of ionic species. Our goal is to quantify this accumulation of charge as a function of the different physical mechanisms that take place along its bulk and heterojunctions [2].
To investigate this issue, we developed a simulation model based on the drift-diffusion equations with specific boundary conditions at the heterojunctions [1-2]. The effect of ion migration on the charge and energy profile distributions along the PSC in OC and SC conditions was analyzed. We conclude that the accumulation of charge at the interfaces is strongly affected by the specific contact materials, and critically depends on a compromise among the presence of ions, the values of the carrier mobility, and the interfacial and bulk recombination parameters.
1. López-Varo, P. et al. ACS Energy Letters 1450-1453(2017)
2. García-Rosell, M. et al. J. Phys. Chem. C. (2018)
3. Reenen, S. et al. J. Phys. Chem. Lett. 6, 3808-3814(2015)
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.