The measured capacitance and conductance–voltage (C&G/ω–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 (ε* = ε′ − jε″), loss tangent (tanδ), complex electric modulus (M* = M′ + jM″), and electrical conductivity (σ). It was uncovered that dielectric constant (ε′), dielectric loss (ε″), tanδ, 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 (Nss) and the BSA doped-PANI interlayer. Such behavior in ε′, ε″, and tanδ, behavior with frequency was also explained by Maxwell–Wagner relaxation. The values of σ 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.
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This work was supported by the Karabük University Scientific Research Project Unit under Contract No: KBÜ BAP-17-DS-409. The authors would like to thank to the Karabük University Scientific Research Project Unit for their financial support.
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Karaoğlan, N., Tecimer, H.U., Altındal, Ş. et al. Dielectric characterization of BSA doped-PANI interlayered metal–semiconductor structures. J Mater Sci: Mater Electron 30, 14224–14232 (2019). https://doi.org/10.1007/s10854-019-01791-2