Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics 2018 (AP-HOPV18)
Publication date: 27th October 2017
Organometal halide perovskite crystal, which is constructed from A (organic cations) : B (metal cations) : X (halide anions) = 1 : 1 : 3, shows various crystal phases and optical properties.1-5. In general, it is anticipated to further improve optical properties and discover of new valuable knowledge by novel materials.
In this study, we used several organic cations of lager radius than commonly-used Methylammonium cation (MA+) (238 pm), such as Formamidinium cation (FA+) (277 pm), Dimethylammonium cation (DMA+) (296 pm), Acetamidinium cation (AA+) (300 pm), and Guanidium cation (GA+) (280 pm), into A site with cesium cation (Cs+) (167 pm), and tried making perovskite layer. As a result, we revealed that some of the composite cations layers were turned black at relatively lower annealing temperature (100 ℃), and their minimum optical bandgaps were 1.54eV, 1.69eV, 1.70eV and 2.23eV, respectively, although the layers were not black phase up to 400℃ in the case of using DMA+ or AA+ without Cs+. The results of XRD analysis indicated that crystal orientation could be controlled by A site cations combination. Remarkably, optical bandgaps were narrowed by crystal orientation at the certain Cs+ ratio.
References
1. Michael Saliba, Taisuke Matsui, Michael Grätzel, et al. Energy Environ. Sci., 2016,9, 1989-1997.
2. Zhen Li, et al. Chem. Mater. 2016, 28, 284−292.
3. Michael Saliba, Taisuke Matsui, Michael Grätzel, et al. Science 29 Sep 016: aah5557.
4. Zeguo Tang, Takeru Bessho, Hiroshi Segawa et al. Scientific Reports 7, 12183 (2017).
5. Wan-Jian Yin, et al. Mater. Chem. A, 2015,3, 8926-8942.
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.