Effect of Acid Doping on Junction Characteristics of ITO/Polyaniline/N719/Ag Diode

Abstract

In this paper, we demonstrate the fabrication and electrical characterization of a heterojunction Schottky diode between polyaniline (PANI) and a ruthenium-based organic semiconductor (N719). In this system, PANI behaves as an organic p-type conducting polymer while N719 acts as an n-type semiconductor. The fabrication was carried out using different methods to deposit each component: solution casting for PANI, spray coating for N719, and screen-printing for silver paste. The PANI film was doped by soaking it in HCl solutions of different concentrations to form emeraldine salt, i.e., a conductive type of PANI. Electrical characterizations of PANI and the diode were performed using conductivity and current density-voltage (J-V) measurements. The maximum conductivity of PANI was obtained at 3.18 9 10 À2 S/cm using an HCl concentration of 1 M. The fabricated diode exhibited a low Schottky barrier (U B = 0.48 eV) and rectifying behavior (c $ 9) with moderate ideality factor (g $ 8). Acid doping of PANI caused better diode performance and an increase in current density by four orders of magnitude.

Temperature dependent characteristics of flexible p-PANI/n-ZnO based hybrid heterojunction diode

“…A fixed potential of 0.75 V with respect to the reference electrode was applied for 1200 s to deposit the PANI films. These PANI films were then washed with water to remove any loose moieties [47][48][49].…”

Reduced Graphene Oxide-Based Dielectric Nanocomposites with Small Dielectric Relaxation Times for Emerging Dielectric Electronics with High-Frequency Performance Demands

“…Polyaniline (PANI) is a P-type conductive polymer with easy synthesis, controllable conductivity, and good stability. 13 It occurs in three different oxidation states, entirely oxidized pernigraniline, entirely reduced leucoemeraldine, and halfoxidized emeraldine. The emeraldine with protonated imine nitrogen exhibits the highest electrical conductivity.…”