Zhi Jian, Chen Angran, Cui Houlei, Xie Yian, Huang Fuqiang
CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics Chinese Academy of Sciences, Shanghai 200050, P. R. China.
Phys Chem Chem Phys. 2015 Feb 21;17(7):5103-8. doi: 10.1039/c4cp04918g.
Reducing light-induced e-h recombination is important for a dye sensitized solar cell (DSSC); the p-type NiO component in TiO2-NiO nanoparticles was reported to significantly decrease charge recombination, but its photovoltaic efficiency remains below 4% owing to a small surface area. In this work, we used a one-pot self-assembly process to fabricate flower-like mesoporous TiO2 decorated by NiO oxides, employing a pluronic polymer P123 as a structure directing and pore forming agent. The flower-like porous TiO2-NiO nanoparticles (F-TiO2-NiO NPs), possessing a high BET surface of 130 m(2) g(-1), are first used as a photoanode in DSSCs. These hybrid nanoparticles, decorated with NiO islands, are beneficial for improving photocurrent by increasing dye absorption and suppressing electron-hole recombination. The optimized F-TiO2-NiO NP anode (10 μm thick) achieved a power conversion efficiency of 8.20%, which is 26% and 47% higher than pristine flower-like TiO2 and commercially available P25 anodes, respectively. This efficiency is the highest among the reported TiO2-NiO hybrid anodes.
减少光致电子 - 空穴复合对于染料敏化太阳能电池（DSSC）很重要；据报道，TiO₂ - NiO纳米颗粒中的p型NiO组分可显著降低电荷复合，但由于表面积小，其光伏效率仍低于4%。在这项工作中，我们使用一锅自组装工艺制备了由NiO氧化物修饰的花状介孔TiO₂，采用普朗尼克聚合物P123作为结构导向和成孔剂。具有130 m² g⁻¹高比表面积的花状多孔TiO₂ - NiO纳米颗粒（F - TiO₂ - NiO NPs）首次被用作DSSC中的光阳极。这些装饰有NiO岛的混合纳米颗粒，通过增加染料吸收和抑制电子 - 空穴复合，有利于提高光电流。优化后的F - TiO₂ - NiO NP阳极（10μm厚）实现了8.20%的功率转换效率，分别比原始花状TiO₂和市售P25阳极高26%和47%。该效率是已报道的TiO₂ - NiO混合阳极中最高的。
