skip to main content

SciTech ConnectSciTech Connect

Title: Investigation of Cu(In,Ga)Se{sub 2} polycrystalline growth: Ga diffusion and surface morphology evolution

Graphical abstract: - Highlights: • Ga diffusion in CIGS absorption layer after annealing treatment. • Phenomenon of surface reconstruction after annealing treatment. • Understand selenium effect on CIGS annealing process. • Explain the kinetic of Ga diffusion and MoSe{sub 2} formation. - Abstract: We report a study of selenization and annealing treatment of copper indium gallium selenide (CIGS) film. Morphologies and composition of surface and cross section were observed by scanning electron microscopy (SEM) equipped with Energy Dispersive Spectroscopy (EDS). X-ray diffraction (XRD) and Raman spectra were used to investigate film structure. Depth profiles of element distributions were detected by Auger electron spectroscopy (AES). A double-layer structure was formed in the film by selenizing metallic precursor at 450 °C. Further annealing at 600 °C in pure argon enhanced gallium diffusion from the bottom to the top of the film, while additional selenium in the annealing had a negative effect. A MoSe{sub 2} layer was detected between CIGS and Mo layers with annealing in additional Se. The annealing treatment also significantly modified the film surface morphology. A large amount of triangular and polygon shaped islands were observed by SEM. That might be due to different nucleation kinetics for different crystal facets.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ; ; ;  [1]
  1. Department of Physics, Peking University, Beijing 100871 (China)
  2. (IMN), Université de Nantes, UMR CNRS 6502, 2 rue de la Houssinière, BP 32229, 44322 Nantes Cedex 3 (France)
  3. (China)
Publication Date:
OSTI Identifier:
22341830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 49; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION; ANNEALING; AUGER ELECTRON SPECTROSCOPY; CROSS SECTIONS; DIFFUSION; GALLIUM; KINETICS; MOLYBDENUM SELENIDES; NUCLEATION; POLYCRYSTALS; RAMAN SPECTRA; SCANNING ELECTRON MICROSCOPY; SELENIUM; THIN FILMS; X-RAY DIFFRACTION