Effect of N719 dye concentration on the conversion efficiency of dye sensitized solar cells (DSSCs)‎

Joint Authors

Hassun, Khalil I.
Ali, Abd al-Rahman K.
Bakr, Nabil A.
Jasim, Shayma M.

Source

ZANCO Journal of Pure and Applied Sciences

Publisher

Salahaddin University-Erbil Department of Scientific Publications

Publication Date

2017-08-31

Country of Publication

Iraq

No. of Pages

7

Main Subjects

Physics

English Abstract

In this study, DSSCs with various concentrations (0.125, 0.25 and 0.5 mM) of N719 dye have been successfully prepared using simple steps.

The X-ray diffraction results of the TiO 2 film showed that it is polycrystalline with anatase phase (tetragonal system) having crystallite size of about 12 nm.

The absorbance spectrum of the TiO 2 film and N719 dye at various concentrations was recorded by Ultra Violet – Visible (UV-Vis) spectrophotometer.

The energy band gap of the TiO 2 film calculated by Tauc’s formula was ~ 3.1 eV.

The scanning electron microscope (SEM) image of the TiO 2surface shows a spongy-like morphology having open pores which can enhance the adsorption of the dye molecules the transport of electrons.

The atomic force microscope (AFM) image and the distribution chart of the grains of the TiO 2 film show that the grain size was~ 82 nm.

The DSSC prepared using N719 dye concentration of 0.5 mM achieved the highest conversion efficiency (η) of 2.504 %, respectively.

Subsequently, the enhancement in efficiency was ~ 86 % compared with the conversion efficiency of DSSCs prepared with at N719 dye concentration of 0.125 mM and 0.25 mM.

Data Type

Conference Papers

Record ID

BIM-1389279

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