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Title: Great improvement of photoelectric property from co-sensitization of TiO{sub 2} electrodes with CdS quantum dots and dye N719 in dye-sensitized solar cells

Graphical abstract: - Highlights: • TiO{sub 2} film electrodes have been successfully sensitized with CdS QDs. • DSSC based on CdS QDs-sensitized TiO{sub 2} film with 4 min has the highest efficiency. • CdS QDs can improve the electron transport and reduce the electron recombination. • Our work open up a new avenue for the development of DSSCs. - Abstract: The TiO{sub 2} film electrodes sensitized with CdS quantum dots (QDs) via chemical bath deposition method were successfully prepared as the photoanode of dye-sensitized solar cells (DSSCs). Microstructural characterizations by XRD, SEM, TEM and EDX show that the CdS nanocrystals with the cubic structure have intimate contact to the TiO{sub 2} films. The amount of CdS QDs can be controlled by varying the dipping time. The experiment results demonstrate that the CdS QDs-sensitized solar cells show a wider absorption in the solar spectrum and an enhanced surface photovoltage response. The maximal photoelectric conversion efficiency of 5.57% was achieved by the DSSC based on CdS QDs-sensitized TiO{sub 2} film with 4 min. The performance improvement is ascribed to the enhancement of electron transport, the reduction of electron recombination and the long electron lifetime.
Authors:
 [1] ;  [2] ;  [1] ;  [2] ;  [1] ;  [2] ;  [3] ; ; ;  [1] ;  [2] ;  [3]
  1. Ministry-of-Education, Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan 430062 (China)
  2. (China)
  3. School of Science, Wuhan University of Technology, Wuhan 430070 (China)
Publication Date:
OSTI Identifier:
22290467
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal Issue: 7; 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; CADMIUM SULFIDES; DYES; ELECTRONS; FILMS; MICROSTRUCTURE; QUANTUM DOTS; SEMICONDUCTOR MATERIALS; SOLAR CELLS; TITANIUM OXIDES