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

doi:10.1088/1674-1056/23/4/047302

Abstract TiO₂nanorod 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% (V_oc=497 mV, J_sc=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.

Keywords: solar cell nanorod quantum dot scattering

Received: 29 July 2013
Revised: 02 September 2013
Accepted manuscript online:

PACS:	73.50.Pz	(Photoconduction and photovoltaic effects)
	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)

Corresponding Authors: 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

Cite this article:

Mahmoud Samadpour, Azam Iraji zad, Mehdi Molaei Simply synthesized TiO₂ nanorods as an effective scattering layer for quantum dot sensitized solar cells 2014 Chin. Phys. B 23 047302

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

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