中国物理B ›› 2014, Vol. 23 ›› Issue (4): 47302-047302.doi: 10.1088/1674-1056/23/4/047302

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Simply synthesized TiO2 nanorods as an effective scattering layer for quantum dot sensitized solar cells

Mahmoud Samadpoura, Azam Iraji zadb c, Mehdi Molaeid   

  1. a Department of Physics, Faculty of Science, K. N. Toosi University of Technology, P. O. Box 15418-49611, Tehran, Iran;
    b Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P. O. Box 11155-8639, Tehran, Iran;
    c Department of Physics, Sharif University of Technology, P. O. Box 11155-9161, Tehran, Iran;
    d Department of Physics, Faculty of Science,Vali-e-Asr University, Rafsanjan, Iran
  • 收稿日期:2013-07-29 修回日期:2013-09-02 出版日期:2014-04-15 发布日期:2014-04-15

Simply synthesized TiO2 nanorods as an effective scattering layer for quantum dot sensitized solar cells

Mahmoud Samadpoura, Azam Iraji zadb c, Mehdi Molaeid   

  1. a Department of Physics, Faculty of Science, K. N. Toosi University of Technology, P. O. Box 15418-49611, Tehran, Iran;
    b Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P. O. Box 11155-8639, Tehran, Iran;
    c Department of Physics, Sharif University of Technology, P. O. Box 11155-9161, Tehran, Iran;
    d Department of Physics, Faculty of Science,Vali-e-Asr University, Rafsanjan, Iran
  • Received:2013-07-29 Revised:2013-09-02 Online:2014-04-15 Published:2014-04-15
  • Contact: Mahmoud Samadpour, Azam Iraji zad E-mail:samadpour@kntu.ac.ir;iraji@sharif.edu
  • About author:73.50.Pz; 73.50.Gr; 81.07.-b; 82.47.Jk

摘要: TiO2 nanorod layers are synthesized by simple chemical oxidation of Ti substrates. Diffuse reflectance spectroscopy measurements show effective light scattering properties originating from nanorods with length scales on the order of one micron. The films are sensitized with CdSe quantum dots (QDs) by successive ionic layer adsorption and reaction (SILAR) and integrated as a photoanode in quantum dot sensitized solar cells (QDSCs). Incorporating nanorods in photoanode structures provided 4-to 8-fold enhancement in light scattering, which leads to a high power conversion efficiency, 3.03% (Voc=497 mV, Jsc=11.32 mA/cm2, FF=0.54), in optimized structures. High efficiency can be obtained just by tuning the photoanode structure without further treatments, which will make this system a promising nanostructure for efficient quantum dot sensitized solar cells.

关键词: solar cell, nanorod, quantum dot, scattering

Abstract: TiO2 nanorod layers are synthesized by simple chemical oxidation of Ti substrates. Diffuse reflectance spectroscopy measurements show effective light scattering properties originating from nanorods with length scales on the order of one micron. The films are sensitized with CdSe quantum dots (QDs) by successive ionic layer adsorption and reaction (SILAR) and integrated as a photoanode in quantum dot sensitized solar cells (QDSCs). Incorporating nanorods in photoanode structures provided 4-to 8-fold enhancement in light scattering, which leads to a high power conversion efficiency, 3.03% (Voc=497 mV, Jsc=11.32 mA/cm2, FF=0.54), in optimized structures. High efficiency can be obtained just by tuning the photoanode structure without further treatments, which will make this system a promising nanostructure for efficient quantum dot sensitized solar cells.

Key words: solar cell, nanorod, quantum dot, scattering

中图分类号:  (Photoconduction and photovoltaic effects)

  • 73.50.Pz
73.50.Gr (Charge carriers: generation, recombination, lifetime, trapping, mean free paths) 81.07.-b (Nanoscale materials and structures: fabrication and characterization) 82.47.Jk (Photoelectrochemical cells, photoelectrochromic and other hybrid electrochemical energy storage devices)