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

Samadpour, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1088/1674-1056/23/4/047302
  3. Abstract:
  4. 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
  5. Keywords:
  6. Light scattering ; Scattering ; Semiconductor quantum dots ; Solar cells ; Titanium ; Titanium dioxide ; Chemical oxidation ; Diffuse reflectance spectroscopy ; High power conversion ; Optimized structures ; Quantum dot ; Quantum dot-sensitized solar cells ; Scattering property ; Successive ionic layer adsorption and reactions ; Nanorods
  7. Source: Chinese Physics B ; Vol. 23, issue. 4 , 2014
  8. URL: http://iopscience.iop.org/1674-1056/23/4/047302