Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
P-type dye sensitized solar cells (p-DSCs)1,2 have been intensity investigated during the past years owing to its potential applications in fabricating tandem solar cells3,4, as well as developing solar fuels device. In order to improve the performance of this kind of solar cells, the optimization of different components, such as p-type semiconductor, organic dyes and redox couples, has been carried out. However, the efficiency of this solar cell is limited by all the unsatisfying photovoltaic parameters, photocurrent, photovoltage and fill factor. In liquid p-type dye sensitized solar cell, the theoretical open circuit voltage (Voc) is determined by the Fermi level of NiO and the reduced potential of redox mediators. The maximum Voc value of device using I−/I3− is located at 0.2-0.3 V. In order to increase the Voc of this kind of device, new materials including p-type semiconductors with more positive Fermi Level or redox mediators with more negative redox potential are required. In 2013, Bach and co-workers fabricated a device using the cobalt-based electrolyteunder O2-free condition and obtained an impressive Voc of 0.7 mV, rendering an efficiency of up to 1.30%.5 However, so far, all dye sensitized p-type NiO solar cells reported in the literature are constructed on the basis of liquid electrolytes. The fundamental concept proposed in our recentwork is to investigate the potential of solid state p-type DSCs based on mesoporous NiO with an electron transport material as mediator undertaking the electron transport between two electrodes. With an organic dye, we fabricated a solid state device for the first time, which achieved a Voc value of more than 0.6 V. Using (CH3NH3)PbI3 perovskite material instead of organic dye as a photosensitizer, a Voc value of up to 0.8 V with a record efficiency of 1.5% have been achieved by a solid state p-type NiO mesoporous solar cells.
Reference: [1] J. He, H. Lindstroem, A. Hagfeldt and S.-E. Lindquist, J. Phys. Chem. B, 1999, 103, 8940. [3] P. Qin, H. Zhu, T. Edvinsson, G. Boschloo, A. Hagfeldt and L. Sun, J .Am. Chem. Soc., 2008, 130, 17629. [2] E. A. Gibson, A. L. Smeigh, L. Le Pleux, J. Fortage, G. Boschloo, E. Blart, Y. Pellegrin, F. Odobel, A. Hagfeldt and L. Hammarstrom, Angew. Chem. Int. Ed., 2009, 48, 4402. [4] A. Nattestad, A. J. Mozer, M. K. R. Fischer, Y. B. Cheng, A. Mishra, P. Bauerle and U. Bach, Nature Mater., 2010, 9, 31. [5] S. Powar, T. Daeneke, M. T. Ma, D. Fu, N. W. Duffy, G. Götz, M. Weidelener, A. Mishra, P. Bäuerle, L. Spiccia and U. Bach, Angew. Chem. Int. Ed., 2013, 52, 602-605.
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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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