Electroluminescence and photoluminescence in porphyrin derived compounds in a new polymeric PVK:PBD host

The electroluminescence (EL) and photoluminescence (PL) of five porphyrin compounds have been investigated. Each of the porphyrin derivations were doped with different concentrations in a PVK(polyvinyl carbazole):PBD(2-(4-biphenyl)-5-(4-t-butyl-phenyl)-1,3,4-oxadiazole) blend as the host. The effect of the porphyrin type on the variation of the peak wavelength, FWHM (wavelength peak of emission spectra), CIE (1931 color Space standard) Coordinate, I–V characteristics have been studied in the same host, and the PL and EL spectra for all porphyrins were compared. It has been shown that the electrical and optical properties of the fabricated device can be controlled by altering the structure and concentration of the dopant.