Publication date: 1st July 2014
Liquid dye-sensitized solar cells (DSCs) are now rapidly giving way to solid-state devices. The removal of organic liquid electrolytes containing the I−/I3− redox couple, was achieved using perovskite materials. Using a novel inorganic material, CsSnI3, we have created new all-solid-state solar cells TiO2 based devices free of liquid electrolyte. This results set off an avalanche of new reports worldwide on the application of Pb-based perovskites in all solid state cells with rapid and spectacular advances in power conversion efficiency. Perovskite materials however are complex and they present challenges in stability, handling, processing etc. How much of this chemistry do we understand? Is it important to understand the chemistry at a fundamental level in order to make further progress? For example, CH3NH3PbI3 and CsSnI3 are unusual materials that undergo complex displacive and reconstructive phase transitions that affect their physical behavior. Tin based materials have even more potential in this field because they can replace the lead based systems, for which there are significant environmental toxicity concerns. The synthesis and chemistry of ASnI3 and APb1-xSnxI3 (A = CH3NH3+, HC(NH2)2+, etc) compounds will be presented. These materials consist of a 3D network and behave as medium band gap semiconductors (Eg = 1.20-1.40 eV) with octahedral metal coordination. The mobilities of carriers in these materials appear to be very high, and when doped the compounds also display significant electrical conductivity. This combination of properties renders the materials ideal for solar cell and other applications. Moreover, CH3NH3SnI3 exhibits intense room temperature photoluminescence at ~ 970nm and HC(NH2)2SnI3 at ~ 900 nm, a property that can be utilized in luminescent solar concentrators. All three properties strongly depend on the synthetic method and are very sensitive to Sn4+ doping level. Results on solar cells constructed from these materials will be presented.
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.