期刊
CHEMISTRY OF MATERIALS
卷 22, 期 3, 页码 1114-1118出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm902272q
关键词
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资金
- Korean Government [KRF-2008-331-D00124]
- Human Resource Training Project for Strategic Technology
- Ministry of Knowledge and Economy
We report TiO2 branched nanostructure photoelectrodes for dye-sensitized solar cells (DSSCs). The TiO2 branch-type nanoparticle is synthesized by means of a seeding method with TiO2, nanowire as a seed. During the seeding process, the TiO2 nanostructure is evolved from a nanowire (NW) to nanobranch (NB) shape. It is also found that rutile TiO2-NB shows such a three-dimensional structure with branches grown along backbones of rutile TiO2-NTW as confirmed by high-resolution transmission electron microscopy (HR-TEM) and X-ray diffraction (XRD) analysis. In photocurrent-voltage measurements, short-circuit current density, and cell efficiency of TiO2-NW and TiO2-NB increase from 6.25 to 12.18 mA/cm(2) and increase from 2.6 to 4.3%, respectively, due to both increased specific surface area and toughness factor.
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