Effectuality of the Frequency Levels on the C&G/ω–V Data of the Polymer Interlayered Metal-Semiconductor Structure

Abstract

Voltage and frequency dependent of capacitance and conductivity versus voltage (C&G/ω–V) qualifications of Al/(ZnFe2O4-PVA)/p-Si structure was compared and examined at lower and higher frequencies as 10 kHz and 1 MHz, respectively. The negative capacitance (NC) is a phenomenon that occurs at low frequencies and is primarily caused by minority carrier injection, series resistance (Rs), and surface states (Nss). Because of the specific density distribution and relaxation times of Nss, NC acts different behavior at lower and higher frequency levels and loses its effectiveness with increasing frequency. Also, the fluctuations in C and G/ω were ascribed to doping concentration, surface states loss charges, and interlayer thickness. Nss was acquired using the low-high frequency capacitance method (CLF-CHF), and the forward biased C−2 vs V graphs (at 10 kHz to 1 MHz) were used to determine the Fermi level (EF), barrier height (ΦB), and concentration of doped acceptor atoms (NA). Accordingly, it has been detected that C and G/ω are highly dependence on biases and frequencies. Then again, the polarizations and surface states effect are barely perceptible at extremely higher frequency levels. Thus, polarization and Rs stand out as important parameters that should be taken into account when examining the basic parameters of electronic devices.

Keywords

• Metal-Polymer-Semiconductor Structures
• Surface States
• Negative Capacitance
• Series Resistance
• Frequency

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