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PV: Plenarvorträge

PV XXVIII

PV XXVIII: Plenarvortrag

Freitag, 20. März 2015, 08:30–09:15, H 0105

Nanocrystalline Junctions and Mesoscopic Solar Cells — •Michael Graetzel — Laboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne Switzerland

Mesoscopic solar cells have emerged as credible contenders to conventional p-n junction photovoltaics [1,2]. Separating light absorption from charge carrier transport, dye sensitized solar cells (DSCs) were the first to use three-dimensional nanocrystalline junctions for solar electricity production, reaching currently a power conversion efficiency (PCE) of 13% in standard air mass 1.5 sunlight. Large-scale production and commercial sales have been launched. Recently we witnessed the meteoric rise of metal halide perovskites such as CH3NH3PbI3 as powerful light harvesters [3,4]. Carrier diffusion lengths in the micron range have been measured for solution-processed perovskites which now attain a certified PCE of 20.1%. Perovskite-based mesoscopic photosystem that mimic natural photosynthesis in generating fuels from sunlight [6] will also be presented.

1.M. Grätzel, Nature 414, 338 (2001). 2.A.Yella, H.-W. Lee, H. N. Tsao, C. Yi, A.Kumar Chandiran, Md.K. Nazeeruddin, EW-G .Diau,,C.-Y Yeh, S. M. Zakeeruddin and M. Grätzel, Science 629, 334 (2011). 3. M. Grätzel, Nature Materals 13, 838 (2014) 4. J. Burschka, N. Pellet, S.-J. Moon, R.Humphry-Baker, P. Gao1, M K. Nazeeruddin and M. Grätzel, Nature 499, 316 (2013). 5. J. Luo, J.-H. Im, M.T. Mayer, M. Schreier, Md.K. Nazeeruddin, N.-G. Park, S.D.Tilley, H.J. Fan, M. Grätzel, Science 345, 1593 (2014).