Electroluminescence Properties of Pure PVK and Doped TiO2 Polymer Thin Films

Polymeric thin films of poly (N-vinylcarbazole) (PVK) with titanium oxide (TiO₂) were fabricated by using spin coating technique. The X-ray diffraction (XRD) data revealed the amorphous nature of PVK polymer matrix and increased with increase of TiO₂ concentration. The complexation of the polymer was confirmed by Fourier transform infrared (FTIR) and UV-Visible studies. The Electroluminescence (EL) spectra of the thin films of polyvinylcarbazole (PVK) with titanium oxide (TiO₂) showed an enhancement in the electroluminescence properties with various molar concentration of dopant. Moreover, the TiO₂ based Poly (N-vinylcarbazole) (PVK) exhibited a remarkable variation at higher molar concentration of the EL spectrum as compared to that of the pure polyvinylcarbazole film. The current-voltage characteristics of the various molar concentrations of TiO₂ shows the same trained in comparison with EL.