Electrochemical synthesis of a double-layer film of ZnO nanosheets/nanoparticles and its application for dye-sensitized solar cells

Chung Wei Kung, Hsin Wei Chen, Chia Yu Lin, Yi Hsuan Lai, R. Vittal, Kuo Chuan Ho

研究成果: Article同行評審

17 引文 斯高帕斯(Scopus)

摘要

A double-layer film, consisting of an upper layer of ZnO nanosheets and a lower layer of ZnO nanoparticles (designated as ZnONS/NP), was synthesized for the photoanode of a dye-sensitized solar cell (DSSC) by a one-step potentiostatic electrodeposition on a conducting fluorine-doped tin oxide substrate at 70 °C in a solution containing zinc nitrate and sodium acetate, followed by the pyrolysis of the film at 300 °C. The growth mechanism of the double-layer nanostructure was studied by monitoring the morphological changes at various periods of electrodeposition. The effects of the concentration of acetate anion on the morphology of the double-layer structure were also studied. The double-layer film of ZnONS/NP showed a better self-established light scattering property, compared with that of a thin film of ZnO nanoparticles, prepared without acetate anion. The concentration of an acetate anion in the electrolyte for the electrodeposition of the double-layer film, the electrodeposition period, and the period for dye adsorption were optimized for obtaining the best performance for a DSSC with a photoanode consisting of the double layer. A metal-free dye, coded as D149, was used in this research. A conversion efficiency of 4.65% was achieved for a DSSC (0.2376 cm2) with the photoanode, consisting of the double-layer film, under 100 mW/cm2 illumination in the wavelength range of 400-800 nm. X-ray diffraction patterns, thermo gravimetric curves, elemental analysis, scanning electron microscopic images, transmission electron microscopic image, transmission spectra, and electrochemical impedance spectra were used to explain observations.

原文English
頁(從 - 到)440-451
頁數12
期刊Progress in Photovoltaics: Research and Applications
22
發行號4
DOIs
出版狀態Published - 2014 四月

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 可再生能源、永續發展與環境
  • 凝聚態物理學
  • 電氣與電子工程

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