This study investigates changes in the charge transfer resistance (R_ct) and diffusion impedance (Z_w) according to the thickness of a CNT/Pt layer coated onto an FTO glass counter electrode (CE) to improve the photovoltaic performance of dye-sensitized solar cells (DSCs). For this purpose, we carefully controlled the thickness of the CE by using different amounts of CNT/Pt in the paste. Note that both R_ct and Z_w decrease with an increase in the thickness of the CEs. Power conversion efficiencies of 7.77, 8.21, 7.58 and 7.36% are determined for DSCs with thicknesses of the CNT/Pt layer of 1, 3.2, 10 and 18 μm, respectively. The obtained results are in good agreement with the changes in the ratio of R_ct/Z_w. When the ratio of R_ct/Z_w becomes one and the R_ct value is less than 1 Ωcm², the device shows the best performance. Because this strategy is simple and effective, it can be useful for developing cost-effective CE materials for DSCs.

这项研究调查了电荷转移电阻（R _ct）和扩散阻抗（Z _w）随涂在FTO玻璃对电极（CE）上的CNT / Pt层的厚度的变化，以改善染料敏化太阳能电池的光伏性能单元（DSC）。为此，我们通过在浆料中使用不同数量的CNT / Pt来仔细控制CE的厚度。注意，随着CE的厚度增加，R _ct和Z _w均减小。对于具有分别为1、3.2、10和18μm的CNT / Pt层厚度的DSC，确定的功率转换效率为7.77、8.21、7.58和7.36％。所得结果与R _ct / Z比的变化非常吻合。_{w ^}。当R的比率_CT / Z_瓦特成为一个和将R _CT值小于1欧姆厘米²时，器件显示出最佳的性能。由于此策略既简单又有效，因此对于为DSC开发具有成本效益的CE材料可能很有用。