Analysis of interfaces in Bornite (Cu5FeS4) fabricated Schottky diode using impedance spectroscopy method and its photosensitive behavior

作者：Sil Sayantan; Dey Arka; Datta Joydeep; Das Mrinmay; Jana Rajkumar; Halder Soumi; Dhar Joydeep; Sanyal Dirtha^*; Ray Partha Pratim^*

来源：Materials Research Bulletin, 2018, 106: 337-345.

DOI：10.1016/j.materresbull.2018.06.016

• Al/Cu5FeS4 Schottky diode
• Impedance spectroscopy
• Space charge limited current (SCLC)
• Mobility
• Transit time

In this report, we have synthesized Bornite (Cu5FeS4) material by hydrothermal synthesis technique. The interface characteristics of Al/Cu5FeS4/FTO Schottky barrier diode (SBD) are investigated by using ac impedance spectroscopy (IS) analysis (under dark condition) and dc current-voltage (I-V) measurements (under dark and light both condition). IS is a powerful tool to identify the interface regions of SBDs. Ac impedance spectra of Al/Cu5FeS4 SBD are recorded in the frequency range 40 Hz-20 MHz during dc bias scanning from -0.6 V to 0.6 V under dark condition. The diode parameter including ideality factor and barrier height is calculated from the conventional I V measurement based on thermionic emission (TE) theory. Space charge limited current (SCLC) theory has been employed to further exemplify the improved performance of Cu5FeS4 based SBD, which points out that the carrier mobility is enhanced similar to 2-fold after irradiation of light.

• 出版日期2018-10