Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Phys Chem Chem Phys. 2009 Nov 7;11(41):9489-96. doi: 10.1039/b912672d. Epub 2009 Aug 18.

Zinc-doping in TiO2 films to enhance electron transport in dye-sensitized solar cells under low-intensity illumination.

Author information

  • 1Department of Chemical Engineering, Center for Micro/Nano Science and Technology, National Cheng Kung University, 70101 Tainan, Taiwan.

Abstract

A nanocrystalline TiO(2) film with highly dispersed Zn-doping shows its capability for efficient electron transport in dye-sensitized solar cells (DSSCs). The Zn-doping is conducted via Zn(2+) introduction into a layered titanate followed by hydrothermal treatment and calcination. The Zn-doped films exhibit an elevated electron Fermi level, which may enhance band bending to lower the density of empty trap states. Because of this Zn-doping, the consequent DSSCs can alleviate the decay of light-to-electric energy conversion efficiency due to light intensity reduction. Intensity-modulated spectroscopic analysis reveals that enhanced transport of photogenerated electrons as a result of the trap density minimization is responsible for the high cell performance under low-intensity illumination. A Zn-doping content of ca. 0.4 at% Zn/Ti can enhance the light conversion efficiency by 23% at a solar light intensity as low as 11 mW cm(-2). This technique can significantly extend the indoor application of DSSCs.

PMID:
19830333
[PubMed]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Royal Society of Chemistry
    Loading ...
    Write to the Help Desk