Dielectric characterization of BSA doped-PANI interlayered metal-semiconductor structures


KARAOĞLAN N. , Tecimer H. U. , ALTINDAL Ş., BİNDAL C.

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, cilt.30, ss.14224-14232, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 30 Konu: 15
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1007/s10854-019-01791-2
  • Dergi Adı: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
  • Sayfa Sayısı: ss.14224-14232

Özet

The measured capacitance and conductance-voltage (C & G/omega-V) data between 1 and 200 kHz of Al/(BSA-doped-PANI)/p-InP structure were examined to uncover real and imaginary components of complex permittivity (epsilon* = epsilon ' - j epsilon ''), loss tangent (tan delta), complex electric modulus (M* = M ' + jM ''), and electrical conductivity (sigma). It was uncovered that dielectric constant (epsilon '), dielectric loss (epsilon ''), tan delta, real and imaginary components (M ' and M '') show a big dispersive behavior at low frequencies due to the oriental and the interfacial polarizations, as well as the surface states (N-ss) and the BSA doped-PANI interlayer. Such behavior in epsilon ', epsilon '', and tan delta, behavior with frequency was also explained by Maxwell-Wagner relaxation. The values of sigma are almost constant at lower-intermediate frequencies, but they start increase at high frequencies which are corresponding to the dc and ac conductivity, respectively. The values of M ' and M '' are lower in the low frequency zone and they become increase with increasing frequency at accumulation region due to the short-range charge carriers mobility. Ultimately, dielectric parameters and electric modulus alteration with frequency is the consequence of surface states and relaxation phenomena.