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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 14 — May. 10, 2010
  • pp: 2557–2560

Low-noise visible-blind photodetectors based on Sr Ti O 3 single crystal with transparent indium tin oxide electrode as window

Er-Jia Guo, Hui-Bin Lu, Meng He, Jie Xing, Kui-Juan Jin, and Guo-Zhen Yang  »View Author Affiliations

Applied Optics, Vol. 49, Issue 14, pp. 2557-2560 (2010)

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We fabricate low-noise visible-blind ultraviolet photodetectors of indium tin oxide / Sr Ti O 3 / Ag (ITO/STO/Ag) based on the properties of STO bandgap excitation and the conductance of ITO thin film. The ITO films are epitaxially grown on STO wafers as electrodes and windows of the photodetectors, simultaneously. The photodetectors have low noise and very good electromagnetic shielding. The dark current is as low as 270 pA even at a 200 V bias. The peak responsivity reaches to 30 mA / W at the wavelength of 360 nm . From the experimental results, the same ideas can be generalized to develop visible-blind and solar-blind UV photodetectors based on wide bandgap materials, such as La Al O 3 , Li Nb O 3 , Li Ta O 3 , Ba Ti O 3 , ZnO, MgO, and Zr O 2 .

© 2010 Optical Society of America

OCIS Codes
(040.5150) Detectors : Photoconductivity
(040.5160) Detectors : Photodetectors
(040.7190) Detectors : Ultraviolet
(310.7005) Thin films : Transparent conductive coatings

ToC Category:

Original Manuscript: February 4, 2010
Manuscript Accepted: March 15, 2010
Published: May 4, 2010

Er-Jia Guo, Hui-Bin Lu, Meng He, Jie Xing, Kui-Juan Jin, and Guo-Zhen Yang, "Low-noise visible-blind photodetectors based on SrTiO3 single crystal with transparent indium tin oxide electrode as window," Appl. Opt. 49, 2557-2560 (2010)

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