The Illumination Intensity and Applied Bias Voltage on Dielectric Properties of Au/Polyvinyl Alcohol (Co, Zn-Doped)/n-Si Schottky Barrier Diodes

Uslu H., ALTINDAL Ş., TUNÇ T., Uslu I., Mammadov T. S.

JOURNAL OF APPLIED POLYMER SCIENCE, cilt.120, sa.1, ss.322-328, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 120 Sayı: 1
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1002/app.33131
  • Dergi Adı: JOURNAL OF APPLIED POLYMER SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.322-328
  • Anahtar Kelimeler: PVA, illumination effect, voltage dependent, dielectric properties, AC electrical conductivity, LIGHT-EMITTING-DIODES, SERIES RESISTANCE, ELECTRICAL CHARACTERISTICS, INTERFACE STATES, AL-TIW-PD2SI/N-SI STRUCTURES, INTERSECTING BEHAVIOR, GAMMA-IRRADIATION, I-V, C-V, FREQUENCY
  • Gazi Üniversitesi Adresli: Evet

Özet

The Au/polyvinyl alcohol (PVA) (Co, Zndoped)/ n-Si Schottky barrier diodes (SBDs) were exposed to various illumination intensities. Illumination effect on the dielectric properties has been investigated by using capacitance- voltage (C-V) and conductance-voltage (G/omega-V) characteristics at 1 MHz and room temperature. The values of dielectric constant (epsilon'), dielectric loss (epsilon ''), loss tangent (tan delta), electric modulus (M' and M ''), and AC electrical conductivity (sigma(AC)) were found strongly intensity dependent on both the illumination levels and applied bias voltage especially in depletion and accumulation regions. Such bias and illumination dependency of these parameters can be explained on the basis of Maxwell-Wagner interfacial polarization and restructuring and reordering of charges at interface states. In addition, the epsilon'-V plots also show an intersection feature at similar to 2.8 V and such behavior of the epsilon'-V plots appears as an abnormality compared with the conventional behavior of an ideal SBD. The obtained results revealed that illumination intensity enhances the conductivity of Au/PVA(Co, Zndoped)/ n-Si SBD. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 120: 322-328, 2011