Wet chemical route to hierarchical TiO2 nanodendrite/ nanoparticle composite anodes for dye-sensitized solar cells

Wen Pin Liao, Jih-Jen Wu

研究成果: Article同行評審

50 引文 斯高帕斯(Scopus)

摘要

Hierarchical rutile TiO2 nanodendrite (ND)/nanoparticle (NP) composite films have been synthesized on fluorine-doped tin oxide (FTO) substrates for use in dye-sensitized solar cells (DSSCs). The rutile TiO 2 ND array is first derived from the nanowire (NW) array on FTO by the growth of the branches on the surface of the TiO2 NWs using a wet chemical route in the absence of an organic structure-directing agent. High-resolution transmission electron microscopy (HRTEM) characterization shows that twin structures appear at the boundary of the NWs and branches. The NPs are subsequently grown within the interstices of the ND array by another chemical bath deposition. With an anode thickness of 3 μm, the efficiency of the rutile TiO2 ND/NP DSSC is superior to that of the P25 DSSC. Although a slower electron transport rate is observed in the rutile TiO2 ND/NP anode compared to the P25 anode, the rutile TiO2 ND/NP anode possesses a significantly larger electron lifetime and therefore a superior diffusion length.

原文English
頁(從 - 到)9255-9262
頁數8
期刊Journal of Materials Chemistry
21
發行號25
DOIs
出版狀態Published - 2011 七月 7

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 材料化學

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