Effect of TiO2 Layers Thickness Inhomogeneity on Transport of Charge Carriers in Disperse Dye Solar Cells

Author(s) I.I. Ivanov1,2, V.B. Lozinskii1,3, V.P. Kasatkin3

1 College of Physics, Jilin University, Changchun, 130012 People’s Republic of China

2 Institute of High Technologies, Taras Shevchenko National University of Kyiv, 64, Volodymyrska Str., 01033 Kyiv, Ukraine

3 V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 41, Nauky Prosp., 03028 Kyiv, Ukraine

Е-mail ivancko@gmail.com
Issue Volume 9, Year 2017, Number 6
Dates Received 20 August 2017; revised manuscript received 15 November 2017; published online 24 November 2017
Citation I.I. Ivanov, V.B. Lozinskii, V.P. Kasatkin, J. Nano- Electron. Phys. 9 No 6, 06001 (2017)
DOI 10.21272/jnep.9(6).06001
PACS Number(s) 84.60.Jt, 82.47.Jk
Key words TiO2 (6) , Dye solar cell, Diffusion (9) , Transport (5) , Dispersion (15) .
Annotation Diffusion transport in a nanocrystalline TiO2 layer of a solar cell with dye for various values of the dispersion of the thickness of a TiO2 layer was studied. A model of the transport, which considers the influence of the dispersion of the thickness of a TiO2 layer on the total response of the electrolyte/TiO2/FTO system under pulse laser irradiation, is developed. In the model, the motion of charge carriers through such a TiO2 layer is described as a motion through the system of parallel TiO2 links with various lengths. In the presence of the dispersion of the thickness of a TiO2 layer described by the Gauss function, the coefficient of diffusion of charge carriers increases and the position of the diffusion peak shifts to shorter times as compared with the dispersionless case. The dispersion of the coefficient of diffusion for specimens with a distribution over thicknesses measured with a profilometer was calculated.