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Nanocoral PbS thin film growth by solid-vapor deposition

A. S. OBAID1,2,* , M. A. MAHDI1,3, Z. HASSAN1

Affiliation

  1. Nano-Optoelectronics Research and Technology Laboratory School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
  2. Department of physics college of Sciences University of Anbar P.O.box PO. (55 431), Baghdad, Iraq
  3. Physics Department, College of Science, Basrah University, Basrah, Iraq

Abstract

Nanocoral PbS thin films were synthesized by vapor-solid deposition. Lead sulfide powder was first prepared and then heated in a tube furnace at 1323.15 K (1050 °C), and the resultant vapor was carried to the quartz substrate zone by an argon flow. The structural properties of the powder and the films were investigated using X-ray diffraction. The grain sizes of 11 and 41nm for both the powder and the nanocoral were obtained, respectively. The surface morphology of the powder and thin films were studied by electron scanning microscopy (SEM) and the micrographs revealed that the films are very adherent on the substrate with nanocoral-like shaped. The direct optical band gap of the nancoral PbS and powder were determined from optical transmittance measurements to be 0.37 and 0.4 eV, respectively..

Keywords

Nanocoral PbS, Solid-vapor deposition, PbS thin films.

Citation

A. S. OBAID, M. A. MAHDI, Z. HASSAN, Nanocoral PbS thin film growth by solid-vapor deposition, Optoelectronics and Advanced Materials - Rapid Communications, 6, 3-4, March-April 2012, pp.422-426 (2012).

Submitted at: Feb. 12, 2012

Accepted at: April 11, 2012