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Fabrication and characterization of CdSe quantum dots sensitized TiO2 nanotubes films and their photovoltaic properties

M. MALEKSHAHI BYRANVAND1,* , A. NEMATI KHARAT1, L. FATHOLAHI2, Z. MALEKSHAHI BEIRANVAND3

Affiliation

  1. School of Chemistry, University College of Science, University of Tehran, Tehran, Iran
  2. School of Chemistry, Aleshtar Payame Noor University, Lorestan, Iran
  3. Tarbiat Modares University, Department of Materials Engineering, Tehran, Iran

Abstract

TiO2 nanotubes (NTs) were synthesized by hydrothermal method. The TiO2 NTs applied to make photoelectrode for CdSe quantum dots (QDs) sensitized solar cells. CdSe QDs sensitized TiO2 nanotubes were successfully prepared by successive ionic layer adsorption and reaction (SILAR) technique. The morphology, structure and properties of prepared samples were characterized by X-ray powder diffraction (XRD), transition electron microscopy (TEM), scanning electron microscopy (SEM) and UV-Vis absorption spectroscopy. The decorated CdSe QDs expanded the photoresponse range of TiO2 NTs from ultraviolet region to 540-640 nm and the CdSe/TiO2 NTs prepared by SILAR deposition of 6 cycles exhibited the highest visible photocurrent..

Keywords

TiO2 nanotubes (NTs), CdSe quantum dots (QDs), SILAR, Photocurrent.

Citation

M. MALEKSHAHI BYRANVAND, A. NEMATI KHARAT, L. FATHOLAHI, Z. MALEKSHAHI BEIRANVAND, Fabrication and characterization of CdSe quantum dots sensitized TiO2 nanotubes films and their photovoltaic properties, Optoelectronics and Advanced Materials - Rapid Communications, 7, 11-12, November-December 2013, pp.961-964 (2013).

Submitted at: July 4, 2013

Accepted at: Nov. 7, 2013