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Title: Synthesis and characteristics of spray deposited CuInS{sub 2} nanocrystals thin films for photovoltaic applications

Graphical abstract: - Highlights: • CuInS{sub 2} nanocrystals thin films were synthesized by spray pyrolysis technique. • They are polycrystalline and have chalcopyrite (tetragonal) structure. • They have high absorption coefficient ∼10{sup 4} cm{sup −1} and optimum band gap of 1.55 eV. • They showed excellent opto-electronic properties employable in photovoltaics. - Abstract: Nanocrystalline thin films of CuInS{sub 2}, an attractive absorber material for highly efficient and terrestrial photovoltaic devices, were deposited on ultraclean glass substrates using spray pyrolysis technique. The prepared films were characterized by FESEM, FETEM, HRTEM, AFM, XRD, optical absorption spectroscopy, photoluminescence and current–voltage characteristics. The films exhibit almost smooth, dense and uniform topography; and have nano-sized particles 40–60 nm of CuInS{sub 2}. XRD data show that the films are polycrystalline and have chalcopyrite (tetragonal) structure with crystallite size 45–60 nm. Optical absorption studies show that the band gap of spray deposited CuInS{sub 2} films is 1.55 eV, while absorption coefficient is of ∼10{sup 5} cm{sup −1}. PL spectra have only one peak at 1.43 eV which may be attributed to the excitonic recombination through donor–acceptor impurity levels in the sample. Furthermore, CdS/CuInS{sub 2} heterojunction was also produced onto ITO coated glass substrate to evaluate solar cellmore » parameters such as short circuit current density, open circuit voltage, fill factor and conversion efficiency.« less
Authors:
 [1] ;  [2] ;  [1] ;  [3]
  1. King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451 (Saudi Arabia)
  2. Materials Science Lab., Department of Physics, Chaudhary Devi Lal University, Sirsa 125055 (India)
  3. (Saudi Arabia)
Publication Date:
OSTI Identifier:
22285159
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal Issue: 10; 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; ATOMIC FORCE MICROSCOPY; CHALCOPYRITE; COPPER SULFIDES; DEPOSITS; EV RANGE 01-10; INDIUM SULFIDES; NANOSTRUCTURES; PHOTOVOLTAIC EFFECT; POLYCRYSTALS; PYROLYSIS; SOLAR CELLS; SYNTHESIS; THIN FILMS; X-RAY DIFFRACTION