FABRICATION OF DYE SENSITIZED SOLAR CELLS WITH DIFFERENT ANCHORING MODE BASED TRIPHENYLAMINE DYES
Two new organic sensitizers o f type D-n-A (Donor-n-Acceptor) and D-(n-A)2 were designed and synthe sized to understand the effect o f anchoring mode towards TiO2 film which leads to influence the efficiency of the fabricated dye sensitized solar cells. These dyes were synthesized based on the triphenylamine as electron donor, phenylhydrazine as п-conjugated spacer and 4-iodobenzoic acid as anchoring/acceptor group and characterized by H, 13C-NMR and Mass spectroscopy studies. The optical absorption o f sensitizers shows red shift as well as high molar extinction co-efficient with extension o f the п-conjugation and the quantum chemical calculation studies were performed to provide sufficient driving force for electron injection into conduction band o f TiO2. The DSSC based on type D-(n-A)2 shows power conversion efficiency (PCE = n) 1.07% under simulated AM 1.5 G; due to more positive HOMO values, higher IPCE values, high adsorption capacity on TiO2 as well as longer electron life time o f dye .
National Institute of Technology