Abstract
A new triazo dye was synthesized from tri(p-aminophenyl)amine and 2 hydroxy-3-napthoic acid and explored the possibilities of its uses in dye sensitized solar cells for the first time. The photocells were able to generate reasonably high photocurrent in the presence of the electron donating ionic liquids in the electrolyte composed of redox couple I3 /I . Cells fabricated by sensitizing TiO2 generated a short-circuit photocurrent of ~ 3.5 mA cm -2 , an open-circuit photovoltage of ~ 500 mV with a total power conversion efficiency of ~ 1 % under simulated full sunlight of 100 mW cm -2 (Air Mass 1.5).
Highlights
With the advent of the highly efficient “Gratzel cell”, dye sensitization of wide band gap semiconductors has become a rapidly expanding solar-light conversion system with potential practical applications [1]
The synthetic pathways for Azo compounds, by the classic azotization and coupling reaction, are relatively simple [11]. In this communication we report for the first time synthesis of a new triazo dye from tri(p-aminophenyl) amine and 2hydroxy – 3- napthoic acid and explored the possibilities of use in photovoltaic devices (PVD)
The threshold wavelength of the spectrum is around 620 nm, which is desirable for the light harvesting of corresponding dye sensitized solar cells
Summary
With the advent of the highly efficient “Gratzel cell”, dye sensitization of wide band gap semiconductors has become a rapidly expanding solar-light conversion system with potential practical applications [1] In these devices, upon absorption of light, the dye adsorbed on the surface of the semiconductor injects and electron in to the conduction band of the semiconductor. Some pure organic dyes with rich photopysical properties are expected to be promising sensitizers for nanocrystalline solar cells in view of their character of less cost and easy tailoring In this context, Azo dyes and pigments have attracted considerable attention in recent times since they represent the largest chemical class in the colour index and the largest class of the dyes used in the industry and the analytical chemistry [11,12,13,14]. In this communication we report for the first time synthesis of a new triazo dye from tri(p-aminophenyl) amine and 2hydroxy – 3- napthoic acid and explored the possibilities of use in photovoltaic devices (PVD)
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