Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
Dye sensitized photocathode has been intensively investigated due to its potential application in solar cells and solar fuels [1]. For solar cells, the dye sensitized photocathode solar cells (p-type DSCs) are expected to be integrated with n-type solar cells to form dye sensitized tandem solar cells (t-DSCs) [2,3]. However, the efficiency of p-type DSC is limited by all the unsatisfying photovoltaic parameters, photocurrent, photovoltage and fill factor. Molecular engineering is an effective strategy to improve the photocurrent of p-type DSCs [4, 5]. In order to increase the photovoltage of this kind of device, new materials including p-type semiconductors with more positive Fermi Level or redox mediators with more negative redox potentials are required. So far, all p-type DSCs reported were constructed on the basis of liquid electrolytes. The fundamental concept proposed in our recent work 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 [6]. With an organic dye, we have fabricated a solid state device for the first time, which achieved a Voc value up to 0.6 V. Transient absorption spectroscopy has been used to study the charge transfer mechanism in this novel device. Moreover, adopting the p-type DSCs’ concept, we also focus on fabricating the photocathodes for solar fuels, aiming at hydrogen production. The effect of different arrangement between dye and catalyst on solar fuel performance has been studied.
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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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