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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 17 — Sep. 1, 2012
  • pp: 3585–3587

Wavelength-tunable photoconductivity of dye-sensitized TiO2 nanoparticle films

Wenji Zheng, Gaohong He, and Yulin Deng  »View Author Affiliations

Optics Letters, Vol. 37, Issue 17, pp. 3585-3587 (2012)

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We report in this Letter that wavelength-tunable photodetectors (PDs) can be fabricated by dye-sensitized TiO2 nanoparticle film. The photoelectric response of the detectors is fast. The photocurrent intensity strongly depends on the absorption wavelength of the dye; thus the on/off ratio as a function of light wavelength can be tuned by absorbing different dye molecules. The corresponding mechanism is also discussed. The principle reported in this Letter can be used to fabricate full spectrum PDs with distinctive wavelength selectivity.

© 2012 Optical Society of America

OCIS Codes
(230.2090) Optical devices : Electro-optical devices
(230.5160) Optical devices : Photodetectors

ToC Category:

Original Manuscript: May 14, 2012
Revised Manuscript: July 17, 2012
Manuscript Accepted: July 23, 2012
Published: August 24, 2012

Wenji Zheng, Gaohong He, and Yulin Deng, "Wavelength-tunable photoconductivity of dye-sensitized TiO2 nanoparticle films," Opt. Lett. 37, 3585-3587 (2012)

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