Anatase TiO2 Nanoparticles with Exposed {001} Facets for Efficient Dye-Sensitized Solar Cells

被引:136
作者
Chu, Liang [1 ]
Qin, Zhengfei [2 ,3 ]
Yang, Jianping [1 ]
Li, Xing'ao [2 ,3 ]
机构
[1] NUPT, Sch Sci, Nanjing 210046, Jiangsu, Peoples R China
[2] NUPT, SMSE, Jiangsu Natl Synergist Innovat Ctr Adv Mat SICAM, KLOEID, Nanjing 210046, Jiangsu, Peoples R China
[3] NUPT, SMSE, Jiangsu Natl Synergist Innovat Ctr Adv Mat SICAM, IAM, Nanjing 210046, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
ENERGY-CONVERSION EFFICIENCY; SINGLE-CRYSTALS; MORPHOLOGY; PHOTOELECTRODE; PERCENTAGE; NANOSHEETS;
D O I
10.1038/srep12143
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
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, J(SC) 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.
引用
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页数:10
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