Title:
METHOD OF DETECTING GAS WITH THE USE OF PHOTOCURRENT AMPLIFICATION AND THE LIKE AND GAS SENSOR
Document Type and Number:
WIPO Patent Application WO/2002/021114
Kind Code:
A1
Abstract:
An indium electrode film (2) is formed closely adhering to one face of an organic semiconductor film (1) made of copper phthalocyanine while a gold electrode film (3) is formed on the other face. A voltage is applied to the organic semiconductor film (1) so that the indium electrode (2) side is biased positively. By applying a voltage so that the electrode (2) side is charged positively and irradiating with a light having a wavelength absorbable by the organic semiconductor film (1) the phenomenon of photocurrent multiplication arises at the interface of the organic semiconductor film (1) and the electrode (2). When put under an oxygen or moisture atmosphere in the above state, this gas sensor can detect oxygen or moisture depending on a change in photocurrent due the the multiplication.
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Inventors:
HIRAMOTO MASAHIRO (JP)
YOKOYAMA MASAAKI (JP)
YOSHIDA MANABU (JP)
YOKOYAMA MASAAKI (JP)
YOSHIDA MANABU (JP)
Application Number:
PCT/JP2001/006996
Publication Date:
March 14, 2002
Filing Date:
August 13, 2001
Export Citation:
Assignee:
JAPAN SCIENCE & TECH CORP (JP)
HIRAMOTO MASAHIRO (JP)
YOKOYAMA MASAAKI (JP)
YOSHIDA MANABU (JP)
HIRAMOTO MASAHIRO (JP)
YOKOYAMA MASAAKI (JP)
YOSHIDA MANABU (JP)
International Classes:
G01N25/56; G01N27/416; G01N27/00; G01N27/12; G01N33/00; H01L31/10; H01L51/42; H01L51/00; H01L51/30; (IPC1-7): G01N27/00
Foreign References:
| JPH06313759A | 1994-11-08 | |||
| JPH0580008A | 1993-03-30 |
Other References:
BRINA R. ET AL.: "Chemiresistor gas sensors based on photoconductivity changes in phthalocyanine thin films: Enhancement of response toward ammonia by photoelectrochemical deposition with metal modifiers", ANALYTICAL CHEMISTRY, vol. 62, no. 21, 1990, pages 2357 - 2365, XP002949707
HIRAMOTO M. ET AL.: "Photoinduced hole injection multiplication in P-type quinacridone pigment films", JAPANESE JOURNAL OF APPLIED PHYSICS LETTERS, vol. 35, no. PT. 2, 1996, pages 349 - 351, XP002949708
COUVES J.W. ET AL.: "Effect of oxidising atmosphere on the conductivity and photoconductivity of cofacial metallophthalocyanine polymers", SYNTHETIC METALS, vol. 29, 1989, pages 77 - 82, XP002949709
COLLINS R.A. ET AL.: "Electrical, structural and gas sensing properties of zinc phthalocyanine thin films", THIN SOLID FILMS, vol. 145, 1986, pages 133 - 145, XP002949710
KRIER A. ET AL.: "The influence of no2 on the conductivity of chloro-aluminium phthalocyanine thin films", JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, vol. 58, no. 5, 1997, pages 711 - 716, XP002949711
See also references of EP 1314977A4
HIRAMOTO M. ET AL.: "Photoinduced hole injection multiplication in P-type quinacridone pigment films", JAPANESE JOURNAL OF APPLIED PHYSICS LETTERS, vol. 35, no. PT. 2, 1996, pages 349 - 351, XP002949708
COUVES J.W. ET AL.: "Effect of oxidising atmosphere on the conductivity and photoconductivity of cofacial metallophthalocyanine polymers", SYNTHETIC METALS, vol. 29, 1989, pages 77 - 82, XP002949709
COLLINS R.A. ET AL.: "Electrical, structural and gas sensing properties of zinc phthalocyanine thin films", THIN SOLID FILMS, vol. 145, 1986, pages 133 - 145, XP002949710
KRIER A. ET AL.: "The influence of no2 on the conductivity of chloro-aluminium phthalocyanine thin films", JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, vol. 58, no. 5, 1997, pages 711 - 716, XP002949711
See also references of EP 1314977A4
Attorney, Agent or Firm:
Noguchi, Shigeo (Motomachi 2-chome Naniwa-ku Osaka-shi, Osaka, JP)
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