Studying The Effect of Donor  Dyes on The Performance of Dye-Sensitive Solar Cells DSSCs Based on TiO2 Semiconductor

Farah Khasrw; Hadi J. M Al-Agealy; Methaq A. R. Mohsin

Authors

Farah Khasrw Ministry of Education, Rusafa Second Directorate, Al-Takhi Secondary School for Girls,Baghdad,Iraq.
Hadi J. M Al-Agealy Department of Physics College of Education for Pure Science Ibn-ALHaitham, University of Baghdad, Baghdad-Iraq
Methaq A. R. Mohsin Department of Physics College of Education for Pure Science Ibn-ALHaitham, University of Baghdad, Baghdad-Iraq

Keywords:

Donor, Performance, RuN3, RuN719, Solar Cells, TiO2

Abstract

This study demonstrates the effect of RuN3 and RuN719 donor ruthenium dyes on the performance of dye-sensitive solar cells (DSSCs) by integrating charge transfer theory and quantum transport considerations is subjected to the influences of transition energy, the atomic density, and the charge concentration and bonding coupling. .The mechanism of charge transfer from the excited RuN3 and RuN719 dyes to the conduction band in TiO2 has been elucidated. Transition energy in RuN3/TiO2 and RuN719/TiO2 cells as a function of ethanol solvent polarity, physical force, RuN3, RuN719 and TiO2 material structure, and RuN3, RuN719 and TiO2 pigment spacing. The high transition energy of RuN719/TiO2 increases the probability of charge transfer and reduces the recombination charge, while the low transition energy of RuN3/TiO2 reduces charge transfer and increases the recombination charge. A transition energy reveals that RuN3,RuN719 , TiO2 and ethanol solvent properties play a crucial role improving charge transport in the DSSC from RuN3 and RuN719 dyes and TiO2 surfaces under different bonding coupling at room temperatures. Current density and efficiency increase significantly with increasing transition energy and bonding strength, which improves charge transport and stabilizes the electrolyte system, as a result of the high level of alignment energy of the material system. High current density analyses showed a marked improvement in current density response, mainly due to the strength of the bond between the RuN719 dye and titanium dioxide (TiO2), compared to its decrease in RuN3 with TiO2.This led to an increase in wavefunction interference at the interface, which enhanced charge transport in the RuN719/TiO2 device. The overall performance of the RuN719-TiO2 device has improved thanks to increased charge transfer, reaching 7.2744% compared to 5.3580% for the RuN3/TiO2 device, as a result of increased transition energy and bonding strength.

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