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Influence of carbon nanotubes in gel electrolyte on photovoltaic performance of ZnO dye-sensitized solar cells

22 October 2013

Our research group at the Applied Physics Research Laboratory, Chiang Mai University is actively involving to harvest maximum energy conversion efficiency of solar power into electricity of dye-sensitized solar cells (DSSCs). For years now, DSSCs are considered to be one of the promising alternatives to the existing silicon based-solar cells due to ease of fabrication and low-cost fabrication [1]. Recently, DSSC-productions have been already commercialized for light generation purpose, but they have relatively low efficiency, in which the performance depends on both current and voltage of DSSCs. In this regard, the DSSC performance can be improved in an effective manner through an increase in photogenerated current and photovoltage by suppressing electron back transport. In this respect, it depends particularly on metal-oxide types to well-defined DSSC photoelectrodes. Due to our knowledge gained through zinc oxide (ZnO) materials [2-3], we are now interested in the efficiency improvement of DSSCs using ZnO as photoelectrode-based layers. The structure and mechanism of DSSCs are shown in Figure 1:

Figure 1 Schematic representation of a dye-sensitized solar cell (DSSC) presenting the structure and mechanism.

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