Department of Chemical Engineering, Tatung University , No. 40, Sec. 3, ChungShan North Road, Taipei City 104, Taiwan.
ACS Appl Mater Interfaces. 2014 Mar 12;6(5):3357-64. doi: 10.1021/am405384c. Epub 2014 Feb 6.
In this study, we reported an efficient, flexible, and low-cost (Pt-free and transparent conducting oxide (TCO)-free) counter electrode (CE) made of a polyimide (PI) substrate coated with a Ni3S2/Ni-P bilayer for dye-sensitized solar cells (DSCs). The bilayer Ni3S2/Ni-P hybrid film was deposited on a PI plastic substrate via a series of wet chemical/electrochemical processes. The bottom Ni-P layer was deposited on a PI to replace conventional TCO as a conductive layer, and the top Ni3S2 layer was employed as the electrocatalyst for I3(-) reduction. On the basis of the extensive electrochemical measurments, the as-prepared Ni3S2/Ni-P coated PI flexible CE demonstrated a Pt-like electrocatalytic for I3(-) reduction. As a result, the DSC assembled with the Ni3S2/Ni-P coated PI flexible CE exhibited an impressive photovoltaic conversion efficiency of 6.28% accompanied by a fill factor of 0.63 under 1 sun illumination (100 mW cm(-2), AM 1.5), which is comparative to that of the DSC based on the Pt coated indium tin oxide/polyethylene naphthalate (ITO/PEN) CE.
在这项研究中，我们报告了一种高效、灵活且低成本（无铂和无透明导电氧化物（TCO））的对电极（CE），它由聚酰亚胺（PI）基底上涂覆的 Ni3S2/Ni-P 双层组成，用于染料敏化太阳能电池（DSCs）。双层 Ni3S2/Ni-P 杂化薄膜通过一系列湿化学/电化学过程沉积在 PI 塑料基底上。底部的 Ni-P 层沉积在 PI 上，以替代传统的 TCO 作为导电层，顶部的 Ni3S2 层用作 I3(-)还原的电催化剂。基于广泛的电化学测量，所制备的 Ni3S2/Ni-P 涂覆的 PI 柔性 CE 表现出类似于 Pt 的电催化活性，可用于 I3(-)还原。结果，组装有 Ni3S2/Ni-P 涂覆的 PI 柔性 CE 的 DSC 在 1 个太阳光照（100 mW cm(-2)，AM 1.5）下，展示了令人印象深刻的光电转换效率为 6.28%，填充因子为 0.63，与基于 Pt 涂覆的铟锡氧化物/聚萘二甲酸乙二醇酯（ITO/PEN）CE 的 DSC 相当。
