Abstract
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 5.1-31.2x1019 cm−3 and Vbi of 0.18-0.39 V and ΦB of 0.36 –0.41 eV.
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