Plasmonic effect of ag nanoparticles on polymethine dyes sensitized titanium dioxide

Ibrayev N. Omarova G. Seliverstova E. Ishchenko A. Nuraje N.
2021 Engineered Science Publisher

Engineered Science
2021 #14 69 - 77 pp.

The effect of core@shell nanostructure of Ag@TiO2on the spectral-luminescence properties of polymethine dye (PD) functionalized with sulfonate group and its photovoltaic properties in the PD dye-sensitized solar cell were investigated. Quenching in the fluorescence intensity of PDs molecule by almost 3 times was observed for the dye-absorbed titanium dioxide porous film. Furthermore, the decreasing effect in fluorescence lifetime was found to be significant for the PD molecules modified with functional groups. In the presence of Ag@TiO2nanoparticles (NPs), an increase in the luminescence intensity of PD by 60 -90 % was observed. A mechanism of plasmon nanoparticles effect on the decay of the excited states of dye molecules was proposed. The efficiency of PD-sensitized solar cells was increased by 1.2 times for PD 1and 2.0times for PD 2. The enhancement in the efficiency is result fromthe growth in the spectral sensitivity of solar cell in the region of 400 -450 and 600 -700 nm and a change in the charge-transport parameters of TiO2films.This increase was supported by a decrease in the resistance at the semiconductor-dye interface by 8.2 times for PD 1and 22.4 times for PD 2that leads to the growth in the part of photoelectrons reaching the counter electrode in solar cell with plasmon NPs.

Core-shell structure , Dye-sensitized solar cell , Optical properties , Plasmon , Polymethine dye

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Institute of Molecular Nanophotonics, Buketov Karaganda University, Karaganda, 100028, Kazakhstan
Institute of Organic Chemistry, NAS of Ukraine, Kyiv, 02660, Ukraine
Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan

Institute of Molecular Nanophotonics
Institute of Organic Chemistry
Department of Chemical and Materials Engineering

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