Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2012-07-15

Journal: APPLIED SURFACE SCIENCE

Included Journals: EI、SCIE

Volume: 258

Issue: 19

Page Number: 7465-7469

ISSN: 0169-4332

Key Words: CuInS2; Thin films; SILAR preparation; Hydrothermal annealing

Abstract: CuInS2 thin films have been deposited by successive ionic layer absorption and reaction (SILAR) method, then annealed in a Na2S solution (denoted as hydrothermal annealing) at 200 degrees C for different time. The effect of hydrothermal annealing on the properties of the films was studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and optical absorption spectroscopy. The XRD, TEM and SEM results indicate that well-crystallized CuInS2 films could be obtained after annealing in 0.1 mol/L Na2S solution for 1.5 h. The annealed CuInS2 films were slightly S-rich and the direct band gap varied from 1.32 to 1.58 eV as the annealing time increased from 0.5 h to 2 h. (C) 2012 Elsevier B.V. All rights reserved.