期刊
JOURNAL OF POWER SOURCES
卷 282, 期 -, 页码 202-210出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.02.062
关键词
Titanium dioxide; Hierarchical structure; Growth mechanism; Quantum-dot sensitized solar cells
资金
- NSFC [61204078, 61176004, U1304505]
- Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT)
- Program for Innovative Research Team (in Science and Technology) in University of Henan Province [13IRTSTHNO26]
- Basic and Frontier Research Programs of Henan Province [142300410420]
- Key Project of Science and Technology of Henan Province [13A150517, 14A150002]
Multi-dimensional TiO2 hierarchal structures (MD-THS) assembled by mesoporous nanoribbons consisted of oriented aligned nanocrystals are prepared via thermal decomposing Ti-contained gelatin-like precursor. A unique bridge linking mechanism is proposed to illustrate the formation process of the precursor. Moreover, the as-prepared MD-THS possesses high surface area of 106 cm(2) g(-1), broad pore size distribution from several nanometers to 100 nm and oriented assembled primary nanocrystals, which gives rise to high CdS/CdSe quantum dots loading amount and inhibits the carries recombination in the photoanode. Thanks to these structural advantages, the cell derived from MD-THS demonstrates a power conversion efficiency (PCE) of 4.15%, representing 36% improvement compared with that of the nanocrystal based cell, which permits the promising application of MD-THS as photoanode material in quantum-dot sensitized solar cells. (C) 2015 Elsevier B.V. All rights reserved.
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