Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 118, Issue 30, Pages 16401-16407Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp410325p
Keywords
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Funding
- National Natural Science Foundation of China [51173148]
- Science and Technology Planning Project of Sichuan Province [2010GZ0251, 2011GZX0052]
- Fundamental Research Funds for the Central Universities [SWJTU11ZT10, SWJTU11CX052]
- Innovation Fund for Ph.D. Students of Southwest Jiaotong University
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ZnO crystals with different morphologies including microrods, hierarchical microspheres, and hollow microspheres were fabricated via a simple and low-cost trisodium citrate-assisted hydrothermal method. The related morphologies and structures of the as-prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results showed that trisodium citrate played a crucial role as a capping agent in the formation of ZnO nanostructures, and accordingly, the rational growth mechanism was proposed. The obtained ZnO nanostructures were used as a photoanode in dye-sensitized solar cells (DSSC), and the photovoltaic results demonstrated that the short circuit current density and the overall conversion efficiency of the hierarchical rnicrospheres based DSSC were 6.05 mA cm(-2) and 1.42%, respectively, which were largely improved compared with those of the microrods based DSSC (1.92 mA cm(-2) and 0.41%) and hollow microspheres based DSSC (3.37 mA cm(-2) and 0.79%). The significant improvement for the former was attributed to the sufficient dye loading and efficient light scattering.
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