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首页> 外文期刊>World Journal of Condensed Matter Physics >ZnO Spin-Coating of TiO2 Photo-Electrodes to Enhance the Efficiency of Associated Dye-Sensitized Solar Cells
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ZnO Spin-Coating of TiO2 Photo-Electrodes to Enhance the Efficiency of Associated Dye-Sensitized Solar Cells

机译：TiO2光电电极的ZnO旋涂以增强相关的染料敏化太阳能电池的效率

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摘要

Dye-sensitized solar cells (DSSCs) with ZnO spin-coated TiO2 photo-electrodes are compared to DSSC with a bare TiO2 photo-electrode. It is demonstrated that the deposited ZnO of controlled amount, by varying the precursor concentration in the coating sol, can indeed enhance the performance of the DSSC. The measured power conversion efficiency shows a maximum around the precursor concentration 0.1 M and falls down sharply to 0% beyond this point. The results are interpreted on the basis of two competing factors: At ZnO concentrations less than 0.1 M, the formation of an energy barrier increases the photocurrent by reducing the rate of interfacial back-recombination. At ZnO concentrations greater than 0.1 M, the screening of the TiO2 film by thicker ZnO layers decreases the photocurrent through the reduction of TiO2 dye-adsorption efficiency.
机译：将具有ZnO旋涂TiO2光电极的染料敏化太阳能电池（DSSC）与具有裸露TiO2光电极的DSSC进行比较。事实证明，通过改变涂层溶胶中的前驱体浓度，可控制数量的ZnO沉积确实可以增强DSSC的性能。测得的功率转换效率在前驱物浓度0.1 M附近显示最大值，并在此点之前急剧下降至0％。根据两个相互竞争的因素来解释结果：在ZnO浓度小于0.1 M时，形成能垒会通过降低界面反向复合的速率来增加光电流。在ZnO浓度大于0.1 M时，较厚的ZnO层对TiO2膜的屏蔽会通过降低TiO2染料的吸附效率来降低光电流。

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