Structural, Surface Morphological, and Optical Properties of Pulsed Laser Deposited MoS۲/ZnO Microrods for Optoelectronic Applications

In the present work, hexagonal MoS۲/ZnO thin film was synthesized via pulsed laser deposition method. We studied the structural and optical properties of MoS۲/ZnO thin film deposited on Si (۱۰۰) substrate at room temperature using a Nd:YAG laser (۲۴۸ nm, ۱۰ ns pulse duration and ۱۰ Hz repetition rate). FESEM images demonstrated a flower-like topography of MoS۲/ZnO with the well-defined hexagonal microrods and flat top surface. The band gap was determined from the analysis of UV-Visible spectrum and found to be ۲.۹۰ eV for MoS۲/ZnO microrods and ۳.۱۲ eV for pure ZnO. The hexagonal wurtzite crystal structure of MoS۲/ZnO composite thin film was confirmed by XRD pattern. Raman spectrum of MoS۲/ZnO microrods showed two characteristics peaks at ۳۷۹ and ۴۰۳ corresponding to  and  modes, respectively. Enhancement of the near-band-edge ultraviolet emission was achieved by deposition of MoS۲ on the surface of ZnO microrods. The Ossila four-point probe device measured the DC electrical conductivity. The results indicate that MoS۲/ZnO microrods are regarded as promising prospects for the future of optoelectronic applications.

کلیدواژه ها:

Optoelectronic ، MoS۲ ، PLD Method ، NMoS۲/ZnO Composite