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Development of field-assisted photochromism and an application to an optical memeory

Research Project

Project/Area Number 09555194
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Inorganic materials/Physical properties
Research InstitutionShizuoka University

Principal Investigator

KOBAYASHI Kenkichiro  Faculty of Engineering, Professor, 工学部, 教授 (20153603)

Co-Investigator(Kenkyū-buntansha) SHINOZAKI Mitsuhiro  Sumitomokagaku Co., Research worker, 基礎化学研究所, 研究員
MATSUSHIMA Ryoka  Faculty of Engineering, Professor, 工学部, 教授 (40022008)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥8,000,000 (Direct Cost: ¥8,000,000)
Fiscal Year 1999: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1998: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1997: ¥5,200,000 (Direct Cost: ¥5,200,000)
Keywordsphotochromism / oxide films / electric field assist / oputical memory / 無機系キツ化物薄膜 / フオトクロミズム / フォトクロシズム
Research Abstract

A four-layer device of ITO/Cu-ZnS/SiO_2/metal was fabricated by a sputtering technique ITO/Cu-ZnS/SiO_2/Al devices exhibits low leakage current at an applied voltage of 70 V (an electric filed of 10^8 V/cm). Transient photocurrent at 700 nm is observed only after irradiation of 400 nm. However, no change of absorbance is detected after irradiation of 700 or 400 nm. The reason is that SiO_2 film prevents the charge transfer between Al and Cu-ZnS under light irradiation. Then, we adopted AlN as a host material because AlN has a wide band gap and a considerable hole mobility. AlN films were prepared by RF reactive sputtering technique. Crystalline AlN films were prepared on sapphire substrates under RF power of 100 W or more. C-axis oriented AlN films were deposited on quart and ITO films at a substrate temperate higher than 300℃. The electrical properties of ITO/AlN/Al devices arc dependent on the substrate temperature in the process of deposition of AlN film. No leakage current was observed at 70 Vor less when AlN film in the ITO/AlN/Al device as deposited at 700 ℃. Continuous photocurrent flows at wavelength < 400 nm, and a peak is seen at 280 nm in the spectra of photocurrent. Magnitude of photocurrent is independent of the polarity of a bias voltage, and thus the photocurrent is originated from the photo-induced charge transfer between deep levels and conduction (or valence) bands of AlN.Optical absorbance of the device decreases after the irradiation of 280 nm, and is recovered to the intial value after the irradiation of 380 nm. The change in the optical absorbance is maintained for a few days in the presence of an electric field. These results suggest that the field-assisted photochromism is a powerful method as an optical memory.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (28 results)

All Other

All Publications (28 results)

  • [Publications] Kenkichiro Kobayashi: "Preparation of ZnO film by alternate supply of zinc acetate and H_2O."Chem.Lett.. 6. 511-512 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kenkichiro Kobayashi: "Field-Assisted Adsorption of Oxygen on Rutile Surfaces by an Atomic Force Microscope."J.Materi.Syn.Process. 6. 249-253 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kenkichiro Kobayashi: "Preparation of ZnO Film by Atomic Layer Deposition."Electroceramics in Japan. 2. 158-162 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kenkichiro Kobayashi: "Spatial arrangement of oxygen molecules adsorbed on TiO2 surface by an atomic force microscope with a conductive cantilever."Mater.Sci.Lett., 19(2000)173-175.. 19. 173-175 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kenkichiro Kobayashi: "Photo-induced Charge transfer in oxides and nitrides doped with transition metal ions."Trans.Mater.Resear.Soc.Jpn. 25. 249-252 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kenkichiro Kobayashi: "Control of Adsorption and desorption of oxygen on TiO2 surface by atomic force microscope."Trans.Mater.Resear.Soc.Jpn. 25. 253-256 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kenkichiro Kobayashi and Shinji okudaira: "Preparation of ZnO film by alternate supply of zinc acetate and H_2O."Chem.Lett.. 6. 511-512 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kenkichiro Kobayashi: "Field-Assisted Adsorption of Oxygen oil Rutile Surfaces by an Atomic Force Microscope."J.Materi.Syn.Process.. 6. 249-253 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kenkichiro Kobayashi, Shinji Okudaira, and Yukari Ishida: "Preparation of ZnO Film by Atomic Layer Deposition."Electroceramics in Japan. 2. 158-162 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kenkichiro Kobayashi, Yasumasa Tomita, Shigetoyo Morimoto, and Iwao Fukino: "Spatial arrangement of oxygen molecules adsorbed on TiO2 surface by an atomic force microscope with a conductive cantilever."Mater.Sci.Lett.. 19. 173-175 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kenkichiro Kobayashi, Yasumasa Tomita, and Masaya Yano: "Photo-induced Charge transfer in oxides and nitrides doped with transition metal ions."Trans.Mater.Resear.Soc.Jpn. 25. 249-252 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kenkichiro Kobayashi, Yasumasa Tomita, and Shinya Yoshida: "Control of Adsorption and desorption of oxygen on TiO2 surface by atomic force microscope."Trans.Mater.Resear.Soc.Jpn. 25. 253-256 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kenkichiro Kobayashi: "Preparation of ZnO Film by Atomic Layer Deposition"Electroceramics in Japan. 2. 158-162 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Yasumasa Tomita: "Synthesis and electrical properties of Lil-2xCuxMn2O4"Chem.Lett.. 1023-1024 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Shigenori Matsushima,: "Semiempirical band calculation of Pd-adsorbed Sn2 surface"Jpn.J.Appl. Phys.. 38. 4993-4996 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Yasumasa Tomita: "Diffusion mechanism of copper (I) ion in CuAlBr4 studied by nuclear"Solid State Ionics. 126. 121-131 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 小林健吉郎: "原子間力顕微鏡を用いた原子配列制御"Ceramic Data Book '99. 99. 49-51 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kenkichiro Kobayashi: "Spatial arrangement of oxygen molecules adsorbed on TiO2 surface"Mater.Sci.Lett.. 19. 173-175 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kenkichiro Kobayashi: "Field-Assisted Adsorption of Oxygen on Rutile Sarjao by AFM" J.Mater.Syn.Process.6・4. 249-253 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Kenkichiro Kobayashi: "Generation of Hot Plasma in Electrolytic Solution" ISE. 7. 379-379 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Kenkichiro Kobayashi: "Energy Band Calculation of Ag-Adscibed SnO_2 sarface" ISE. 7. 905-905

    • Related Report
      1998 Annual Research Report
  • [Publications] Kenkichiro Kobayashi: "Field-Assisted photochromism of Co-doped ZnO" J.Mater.Sciem.Lett. (印刷中).

    • Related Report
      1998 Annual Research Report
  • [Publications] Kenkichiro Kobayashi: "Thermogravmetric analyses of La2-xSrxCuO4 and effects of hydrogen atoms on superconductivity." Physica C. 1-2. 74-80 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kenkichiro Kobayashi: "Preparation of ZnO film by alternate supply of zinc acetate and H2O." Chem.Lett. 6. 511-512 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kenkichiro Kobayashi: "Superconductivity of hydrogen doped La1.85SrO.15CuO4." J.Mater.Science Lett.16. 1420-1422 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kenkichiro Kobayashi: "Field-assited adsorption of oxygen on rutile surface by atomic force microscope" IUMRS-ICA-97. 466-466 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kenkichiro Kobayashi,: "Spatial Arrangement of Oxygen Molecules Adsorbed on TiO_2 Surface" Chem.Lett.(印刷中).

    • Related Report
      1997 Annual Research Report
  • [Publications] Kenkichiro Kobayashi: "Field-assited adsorption of oxygen on rutile surface by atomic force microscope" J.Mater.Syn.Processing,. (印刷中).

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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