两步阳极氧化法制备的无定形 TiO2 纳米管及其在染料敏化太阳能电池中的应用。
Open-ended TiO2 nanotubes formed by two-step anodization and their application in dye-sensitized solar cells.
机构信息
Department of Applied Physics, the Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China.
出版信息
Nanoscale. 2012 Jan 21;4(2):448-50. doi: 10.1039/c2nr11317a. Epub 2011 Dec 12.
We demonstrate a simple method to fabricate open-ended TiO(2) nanotube (NT) based dye-sensitized solar cells (DSSCs), where the NTs are attached to either TiO(2) nanorods (NRs) grown on fluorine-doped tin oxide (FTO) or FTO directly by nanoparticles (NPs). A completely hole-through TiO(2) NT layer is fabricated via a two-step anodization with heat treatment immediately after the first anodization. DSSCs with the open-ended NTs show better photovoltaic performance than those with close-ended NTs, due to the enhanced charge transport in the open-ended structure. Under optimum conditions, DSSCs fabricated with the open-ended NT layer exhibit a short circuit current density (J(sc)) of 19.10 mA cm(-2), an open circuit voltage (V(oc)) of 0.68 V, a fill factor (FF) of 0.49, and a power conversion efficiency (eff) of 6.3%.
我们展示了一种简单的方法来制造开放式 TiO(2) 纳米管 (NT) 基染料敏化太阳能电池 (DSSC)，其中 NT 附着在氟掺杂氧化锡 (FTO) 上生长的 TiO(2) 纳米棒 (NR) 上，或者直接附着在 FTO 上。通过两步阳极氧化法和第一次阳极氧化后立即进行热处理，可以制造出完全贯穿 TiO(2) NT 层。由于开放式结构中增强的电荷传输，具有开放式 NT 的 DSSC 表现出比具有封闭式 NT 的 DSSC 更好的光伏性能。在最佳条件下，使用开放式 NT 层制造的 DSSC 表现出 19.10 mA cm(-2) 的短路电流密度 (J(sc))、0.68 V 的开路电压 (V(oc))、0.49 的填充因子 (FF) 和 6.3%的功率转换效率 (eff)。
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