The phthalocyanine blue-green pigments devices intended for optical filters

The crystalline structure, optical, morphological and optical filter properties of magnesium phthalocyanine (MPc) blue-green pigments layers, grown onto glass substrate by the spin coating route, are studied. Besides the capacitance voltage (C-V) characteristics and resistance versus voltage of MPc organic heterojunctions are investigated showing a negative capacitance (NC) within forward bias voltage at higher frequency. Optical analysis demonstrates a top and valley in transmittance profile within visible range which leads to the occurrence of optical filter properties in organic devices. The (123)-oriented monoclinic lattice is revealed by X-ray patterns, optical transmission attains 67% inside Vis range, and the band gap is found to be of 2.9 eV. Nonlinear optical properties of Mg-Phthalocyanine are studied. Nanotips are revealed by atomic force microscope and a size around of 22.76 nm, and the RMS is of 10.5 nm are evaluated. Obtained parameters from C-V characteristics of MgPc/GaAs heterojunction are described and recorded as a result of applied frequency. Such extracted parameters are Nd ranging in 5.1-31.2x10(19) cm(-3) and V-bi of 0.18-0.39 V and Phi(B) of 0.36 -0.41 eV.

Automated summary

The crystalline structure, optical, morphological, and optical filter properties of magnesium phthalocyanine (MPc) blue-green pigments layers grown on a glass substrate using the spin coating method are studied. The C-V characteristics and resistance versus voltage of MPc organic heterojunctions reveal negative capacitance (NC) under forward bias voltage at higher frequency. The optical analysis demonstrates the presence of a top and valley in the transmittance profile within the visible range, resulting in optical filter properties in organic devices. The X-ray patterns reveal a (123)-oriented monoclinic lattice, with an optical transmission of 67% in the visible range and a band gap of 2.9 eV. The nonlinear optical properties of Mg-Phthalocyanine are also investigated. Atomic force microscopy reveals nanotips with a size of approximately 22.76 nm and an RMS of 10.5 nm. The parameters obtained from the C-V characteristics of the MgPc/GaAs heterojunction, such as Nd (ranging from 5.1-31.2x10(19) cm(-3)), V-bi (ranging from 0.18-0.39 V), and Phi(B) (ranging from 0.36-0.41 eV), are described and recorded as a result of the applied frequency.