Wei-Hao ChiuAcademic Profile

International Journal Publication

Efficient electron transport in tetrapod-like ZnO metal-free dye-sensitized solar cells

Author affiliations and roles
  1. aNational Yang Ming Chiao Tung University
  2. bIndustrial Technology Research Institute
  3. cNational Tsing Hua University
  4. eNational Cheng Kung University
  • *Corresponding author: Hsieh, Wen-Feng.

Energy & Environmental Science, 2, 694–698 (2009).

Research topic: Dye-Sensitized Solar Cells

Abstract

The tetrapod-like ZnO nanopowders are employed to construct an efficient electron transport network as the photoanode of the dye-sensitized solar cells (DSCs). Due to the high extinction coefficient of the metal-free D149 dye offering a high photocurrent through the ZnO network, the best performance of DSCs based on a 42 mu m terapod-like ZnO film showed a high energy conversion efficiency of 4.9% with a high short-circuit photocurrent density of 12.3 mA cm(-2), an open-circuit photovoltage of 0.6 V, and a fill factor of 0.65 under AM 1.5 irradiation. Highly efficient electron transport may also be ascribed by a long effective electron diffusion length of 46 mu m determined from the electrochemical impedance spectroscopy which is consistent with thickness dependent J(SC) measurements.

DOI ↗98 Google Scholar citations ↗81 OpenAlex citations ↗FWCI 5.26Top 4.0% normalized citations74 Crossref citations ↗48 Mendeley readers ↗

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