Electronic transport properties of ternary Cd1-xZnxS nanowire network

TL;DR

This study investigates the electronic transport properties of Cd1-xZnxS nanowire networks, revealing significant photocurrent enhancement and tunneling-dominated charge transport, with implications for optoelectronic applications.

Contribution

It provides new insights into the photocurrent behavior and charge transport mechanisms in ternary Cd1-xZnxS nanowire networks under illumination.

Findings

Photocurrent increases up to 4 orders of magnitude under light.

Charge transport is dominated by tunneling at nanowire junctions.

The dynamic photoresponse has a time constant of ~5 seconds.

Abstract

We present electronic transport characteristics of ternary alloy Cd1-xZnxS nanowire networks in the dark and under white light illumination. Compared to the negligible dark current, we observed a photocurrent enhancement up to 4 orders of magnitude at intensity of 460 mW/cm2. The time constant of the dynamic photoresponse is ~5 sec. The current-voltage characteristics at different intensities show Ohmic behavior at low bias and space charge limited conduction (SCLC) at higher bias voltages. The SCLC behavior and slow time response indicate that the charge transport is dominated by tunneling at the percolating inter-nanowire junctions.