Abstract
The forward and reverse bias capacitance–voltage ( C– V) and conductance–voltage ( G / w – V ) characteristics of Al/polymer/PEDOT-PSS/ITO heterojunction diodes have been investigated in the frequency range of 10 kHz to 5 MHz at room temperature. The obtained C– V and G / w – V characteristics of these diodes at various gate biases show fairly large frequency dispersion especially at low frequencies and forward bias due to surface states N ss in equilibrium with the polymer semiconductor and series resistance R s. These observations indicate that at low frequencies, the charges at interface states can easily follow an ac signal and yield an excess capacitance and conductance. In addition, the forward and reverse bias current–voltage ( I– V) characteristics of Al/polymer/PEDOT-PSS/ITO heterojunction diode were measured at room temperature. The main diode parameters such as barrier height Φ B0, ideality factor n and average series resistance R s obtained from the forward bias ln I– V characteristics were found as 0.53 eV, 4.79 and 195 Ω, respectively. Experimental results show that both N ss and R s values should be taken into account in determining frequency and voltage-dependent I– V, C– V and G / w – V characteristics.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
