Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
Perovskite solar cells, notably methyl ammonium lead iodide (MAPI), have become a big player in the area of photovoltaic with new peak efficiencies (22.1 %) challenging the previously well established inorganic thin film cells. Proper understanding of the structure and interactions present in these complicated materials is incredibly important. It is necessary to further the development of both MAPI, but also of new materials which retain the promising features of MAPI but without its downsides.
Previous NMR experiments have shown that there is an interaction between the NH3 head group of the methyl ammonium iodide and the inorganic network of MAPI; but NMR could not fully probe the nature of interaction.[1] More recent Raman spectroscopy studies hypothesised that changing of the halogen – NH3 group interaction caused a change in the MA torsion mode.[2] To further investigate this theory we have synthesised CD3NH3I and CD3ND3I and subsequently synthesised MAPI using both the d3 and d6 deuterated organic cations. Films of d3-MAPI and d6-MAPI have been deposited and will be fully characterised. The impact of the deuterated MAPI will be investigated using impedance spectroscopy, Raman spectroscopy and also basic solar cell characterisation.
1. T. Baikie, N. S. Barrow, Y. Fang, P. J. Keenan, P. R. Slater, R. O. Piltz, M. Gutmann, S. G. Mhaisalkar, and T. J. White, J. Mater. Chem. A, 2015, 3, 9298–9307.
2. R. G. Niemann, A. G. Kontos, D. Palles, E. I. Kamitsos, A. Kaltzoglou, F. Brivio, P. Falaras, and P. J. Cameron, J. Phys. Chem. C, 2016, 120, 2509–2519.
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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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