Abstract
ZnTe and ZnTe:Cu thin films were electrochemically synthesized, and their electrical properties were systematically investigated. Electrochemical redox reactions of ionic species were identified by cyclic voltammetry, presenting the underpotential deposition (UPD) of Zn on Tesite occurred in the potential range of −0.6 to −1 V vs. Ag/AgCl. ZnTe thin films electrodeposited at 80 °C showed polycrystalline phase with strongly preferred to (111) direction observed by XRD. XPS analysis also indicated that there were no other phases in ZnTe films. Incorporation with Cu was performed using an electrodeposition bath containing Cu precursor, Cu(NO3)2, and the amount of incorporated Cu was varied with concentration of the Cu precursor. A significant increase in carrier mobility (∼1 cm2/Vs) and concentration (∼1018/cm3) compared to undoped ZnTe thin films was achieved.
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