Performance evaluation of mixed synthetic organic dye as sensitizer based dye sensitized solar cell

摘要

A combination of two synthetic organic dyes, namely eosin Y and bromophenol were utilized as a novel category of dye for dye-sensitized solar cells (DSSCs). XRD study revealed the anatase form of titanium dioxide. SEM showed roughly spherical and non-homogenous nature of particles. Energy dispersive spectroscopy (EDS) spectrum analysis showed no impurity in TiO2 and ZnO, thus revealing purity in photo electrode materials. The absorbance of dyes was observed by using UV-Vis absorbance spectroscopy. The dyes showed absorbance from visible to near infra red region. Electrochemical impedance spectroscopy (EIS) measures dye solar cell internal resistance. The performance of photovoltaic cells was studied under 100 mW/cm(2) illumination. An enhancement in the power conversion was achieved by using mixed dye (2.31%) that is much higher than single dyed cell (1.62%; eosin Y). The mixed dye exhibiting good device performance and high electrocatalytic activity can provide a sufficiently low cost dye for ruthenium free DSSCs.