New methods for producing pervoskite solar cells with efficiency above 21%

Michael Graetzel^a

^aLaboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Switzerland, Station 6, CH-1015 Lausanne, Lausanne, Switzerland

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

Invited Speaker, Michael Graetzel, presentation 247
Publication date: 28th March 2016

My lecture will describe our new methods for fabricating perovskite solar cells showing a solar to electric power conversion efficiency (PCE) above 21% under standard reporting conditions. I shall also describe a procedure allowing for upscaling the production of these devices with minor loss in performance. These photovoltaics shows intense electroluminescence [1]exceeding the external quantum efficiency of silicon solar cells. As a consequence, very high Voc values over 1.2 V for 1.55 eV band gap materials have been obtained under standard reporting conditions. These high Voc values render perovskite-based photosystem very attractive for use in tandem cellsand for generation of fuels from sunlight. 1. D. Bi, W. Tress, M. I. Dar, P. Gao, J. Luo, C. Renevier, K. Schenk, A. Abate, F. Giordano, J.-P. Correa Baena, J.-D. Decoppet, S. M. Zakeeruddin, M. K. Nazeeruddin, M. Grätzel,A. Hagfeldt, Efficient luminescent solar cells based on tailored mixed-cationperovskites.Sci. Adv. 2, e1501170 (2016).

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