title: Anatase TiO2 Nanoparticles with Exposed {001} Facets for Efficient Dye-Sensitized Solar Cells.
abstract: Anatase TiO2 nanoparticles with exposed {001} facets were synthesized from Ti powder via a sequential hydrothermal reaction process. At the first-step hydrothermal reaction, H-titanate nanowires were obtained in NaOH solution with Ti powder, and at second-step hydrothermal reaction, anatase TiO2 nanoparticles with exposed {001} facets were formed in NH4F solution. If the second-step hydrothermal reaction was carried out in pure water, the H-titanate nanowires were decomposed into random shape anatase-TiO2 nanostructures, as well as few impurity of H2Ti8O17 phase and rutile TiO2 phase. Then, the as-prepared TiO2 nanostructures synthesized in NH4F solution and pure water were applied to the photoanodes of dye-sensitized solar cells (DSSCs), which exhibited power conversion efficiency (PCE) of 7.06% (VOC of 0.756 V, JSC of 14.80 mA/cm(2), FF of 0.631) and 3.47% (VOC of 0.764 V, JSC of 6.86 mA/cm(2), FF of 0.662), respectively. The outstanding performance of DSSCs based on anatase TiO2 nanoparticles with exposed {001} facets was attributed to the high activity and large special surface area for excellent capacity of dye adsorption.
authors.affiliation: School of Science, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, P. R. China.
authors.forename: Liang
authors.initials: L
authors.lastname: Chu
authors.affiliation: Key Laboratory for Organic Electronics &Information Displays (KLOEID) &Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), School of Materials Science and Engineering (SMSE), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, P. R. China.
authors.forename: Zhengfei
authors.initials: Z
authors.lastname: Qin
authors.affiliation: School of Science, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, P. R. China.
authors.forename: Jianping
authors.initials: J
authors.lastname: Yang
authors.affiliation: Key Laboratory for Organic Electronics &Information Displays (KLOEID) &Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), School of Materials Science and Engineering (SMSE), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, P. R. China.
authors.forename: Xing'ao
authors.initials: X
authors.lastname: Li