Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
Publication date: 21st February 2018
Due to their high power conversion efficiency, organic-inorganic lead halide perovskites have emerged as promising materials for next-generation solar devices. However, the long-term stability of this kind of devices is an open question because various different crystalline phases exist in a narrow temperature range.[1] Especially, due to the liquid processing of hybrid organic-inorganic halide perovskites, there is only limited control of the crystal phase that is formed. Since, the crystalline phases can crucially affect the optical and transport properties of the materials, a complete knowledge of the stability ranges of the various crystalline phases is crucial for the design of suitable photovoltaic materials.
To predict reliably the structure of a material, a method that is able to provide an accurate potential energy surface, as well as an algorithm which can find all the low-energy local minima on this potential energy surface are required. Density functional theory (DFT) has proven to work well for lead halide perovskites, with an error in the lattice parameter of ~ 1%. However, DFT is computationally rather expensive that makes it unsuitable for an extensive screening of the phase space of these materials. Therefore, a classical force field is used, instead. For the identification of the different crystalline structures the minima hopping method (MH)[2] has been employed. A variety of different structures was collected from MH simulations of MAPbI3. Apart from the known structures of MAPbI3 (orthorhombic, tetragonal, cubic) many new structures have been explored. To classify these structures with respect to their structural characteristics, a sketchmap is used.[3] A subset of the new structures obtained by MH simulations are further examined as potential candidates for solar cells applications.
[1] Stoumpos, C. C.; Malliakas, C. D.; Kanatzidis, M. G., Inorg. Chem. 52, 9019 (2013).
[2] Goedecker, S., J. Chem. Phys. 120, 9911 (2004).
[3] Ceriotti, M. ; Tribello, G. A. ; Parrinello, M., Proc. Natl. Acad. Sci. 108, 13023 (2011).
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.