STUDY OF AGGREGATION BEHAVIOR AND ELECTRON INJECTION PROCESS OF THIOL SUBSTITUTED ZnPHTHALOCYANINE DERIVATIVE ON TIO2 NANOPARTICLE SURFACE

Tetra carboxyl Zn-phthalocyanine (TCTZnPc) with thiol linker is anchored onto titanium dioxide (TiO 2 ) nanoparticles surface. The presence of a thiol group having lone pair of electrons further increase the electron donating capability of Zn-Phthalocyanine (ZnPc) derivative. TiO 2 thin film is prepared and sensitized with the Zn- Phthalocyanine derivative. The type of aggregation of TCTZnPc in DMF and on TiO 2 surface is studied from the steady-state absorption spectral techniques. The fluorescence spectral studies are carried out to analyze the quenching of ZnPc fluorescence on TiO 2 surface. Further, the time-resolved fluorescence is carried out to confirm the electron injected from excited state TCTZnPc to the TiO 2 nanoparticles conduction band.