4.8 Article

ZnO nanocrystallite aggregates synthesized through interface precipitation for dye-sensitized solar cells

期刊

NANO ENERGY
卷 2, 期 1, 页码 40-48

出版社

ELSEVIER
DOI: 10.1016/j.nanoen.2012.07.009

关键词

Interface precipitation; Dye-loading; Light scattering

资金

  1. US Department of Energy, Office of Basic Energy Sciences, Division of Materials and Engineering [DE-FG02-07ER46467]
  2. National Science Foundation [DMR-1035196]
  3. National Natural Science Foundation of China [50873055]
  4. National Key Basic Research and Development Program of China [2009CB930602]
  5. China Scholarship Council (CSC)

向作者/读者索取更多资源

A novel interface precipitation method has been developed to synthesize hierarchically structured ZnO nanocrystallite aggregates. Such synthesized ZnO nanocrystallite aggregates were demonstrated as a promising structure for high power conversion efficiency when used as photoelectrode in dye-sensitized solar cells (DSCs). In comparison with ZnO nanoparticles synthesized by conventional homogeneous precipitation method, such hierarchical structure has larger specific surface area, more efficient dye-loading and effective light scattering within the photoelectrode; all result in an increased photocurrent. Furthermore, electrochemical impedance spectroscopy study revealed that reduced charge recombination in ZnO nanocrystallite aggregates resulted in enhanced V-OC. As a result, a power conversion efficiency of 5.07% with commercially available dye N719 has been obtained without applying anti-reflection coating and chemical treatment, which was more than 200% of the power conversion efficiency achieved in ZnO nanoparticles synthesized by homogeneous precipitation method in aqueous solution. (C) 2012 Elsevier Ltd. All rights reserved.

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