Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 644, Issue -, Pages 350-353Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.05.040
Keywords
ZnO nanorods; Post-treatment; Photovoltaic performance; Dye-sensitized solar cells
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Funding
- National Natural Science Foundation of China [21201145]
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Novel 1D irregular ZnO nanorods (ZNR) with a rough surface and a partially hollow structure (IZRH) was synthesized through an aqueous chemical growth process, followed by a two-step post-treatment. ZNR was first treated using an innovative hydrothermal method, followed by freezing at subzero temperatures to form IZRH. The as-prepared IZRH was compounded with hierarchical ZnO nanoparticles (ZNP) synthesized through low-temperature solid-phase method. The mixture of IZRH and ZNP was characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy; it was used as photoanode in dye-sensitized solar cells (DSSCs). The photovoltaic performance of DSSCs was investigated. Result shows that after freezing post-treatment, IZRH can significantly enhance the conversion efficiency of DSSCs. The maximum power conversion efficiency reaches 7.08%, which is 33% and 45% higher than those of only hydrothermal post-treatment and without post-treatment, respectively. (C) 2015 Elsevier B.V. All rights reserved.
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