Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
Organic-inorganic halide perovskite archetypically CH3NH3PbX3 (X=Cl, Br or I) have shown remarkable performance in optoelectronic devices, particularly in solar cells where the solar to electrical power conversion efficiency reaching >20%. However, due to the toxicity issue associated with Pb, the real world application of these materials can be difficult. Therefore there is a need to create, investigate and optimise sustainable nontoxic perovskite materials for solar cell application. To this end, we have prepared Hexyldiammonium bismuth iodide (HDABiI5), developed the protocol to make thin-films and investigated the application of Hexyldiammonium bismuth iodide (HDABiI5) as an absorber in solar cell applications. The single crystal analysis of the compound shows that corner sharing BiI6-octahedras form one-dimensional zig-zag chains and the hexyl diammonium cations fills the space between the inorganic chains. UPS and IPES spectra of HDABiI5 on FTO reveal that the Ionization potential (IP) and electron affinity (EA) of HDABiI5 are 6.30 and 4.12 eV, respectively. We prepared solar cell using HDABiI5 as absorber, mesoporous TiO2 as electron transporting and Spiro-OmeTAD as hole transporting materials. The power conversion efficiency was found to be <1% and we attributed to strong excitonic nature of the HDABiI5 and/or mismatched energetics at the interface. As this material is at a preliminary stage of development, further improvement in material quality and use of other type of electron acceptor materials can improve the efficiency of Bi- perovskite based solar cell .
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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.
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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.
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