One-Step Hydrothermal Synthesis of Methylammonium Lead Halide Perovskites
Vladimir V. Shvartsman a, Irina Anusca a, Doru C. Lupascu a, Christian Fettkenhauer a, Gerhard Lackner a, Maryam Khazaee a
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Swansea, United Kingdom, 2016 June 29th - July 1st
Organizers: James Durrant, Henry Snaith and David Worsley
Poster, Christian Fettkenhauer, 308
Publication date: 28th March 2016

Recently perovskite solar cells (PSC) have attracted a lot of attention due to high achievable efficiencies using abundant hybrid organic-inorganic perovskite absorber materials. These materials combine the benefits of both inorganic (e.g. high carrier mobility, wide range of bandgaps) and organic semiconductors (e.g. highly efficient luminescence, mechanical properties). In the present work we report the preparation of the organic-inorganic methylammonium lead trihalides CH3NH3PbX3, (X = Cl, Br, I) by a low temperature (130°C) and autogenous pressure hydrothermal route. The products were characterized by X-ray powder diffraction. Crystal structures were refined via Pawley and Le Bail analysis using TOPAS 5 Software with final RBragg indices in the range of 6-19 %. The optical band gaps were determined by UV-VIS spectroscopy. Hydrothermal synthesis proved to be a viable route to produce large crystalline methylammonium lead trihalides thus offering an alternative to the established routes and may prove to be of extra use where other routes fail.



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