首页|Influence of Sintering Behavior of ZnO Nanoparticles on J-V Characteristics of ZnO-Based Dye-Sensitized Solar Cells
Influence of Sintering Behavior of ZnO Nanoparticles on J-V Characteristics of ZnO-Based Dye-Sensitized Solar Cells
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Trans Tech Publications Ltd
Dye-sensitized solar cells (DSSCs) are one of the promising photovoltaic devices because of their lower manufacturing cost and higher energy conversion efficiency. Wide-gap, porous semiconducting metal oxides are generally used as electrode materials of DSSCs. Previously we utilized ZnO as DSSC electrodes and achieved a high conversion efficiency of 6.58% by improving the structure of ZnO films. However, open-circuit voltage (V_(OC)), one of the factors to determine the performance of DSSCs, was still at a lower level (≈ 0.60 V) than that of common TiO_2-based cells. We believe that the lower V_(OC) is due mainly to the occurrence of recombination. In this work, we tried to enhance V_(OC) by controlling the heating process of electrodes and suppressing the recombination for further development of ZnO-based DSSCs. As a result, we have achieved a higher V_(OC) of 0.725 V, confirming that the sintering behavior (grain growth and/or necking of grains) influenced largely the characteristics of DSSCs.
dye-sensitized solar cellssinteringzinc oxiderecombination
Shintaro Ueno、Shinobu Fujihara
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Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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NSTL
Trans Tech Publications Ltd
