Ultraviolet and Visible Optical studies of (MgPc) Pulsed laser deposited Thin Film

Abstract

With regard to the presented work, the Magnesium Phthalocyanine (MgPc) thin films having various laser energies (200,300,400 and 500mJ) were prepared via pulsed laser deposition (PLD) approach on glass substrate.Also, the FTIR spectrum related toMgPc Powderspecified that NH stretching in addition to the bending vibrations disappeared and there have been (3)strong peaks that appear in region that in range of (700–1200) depending heavily on molecular structure. The optical properties that are related to theMgPc thin film have been examined with the use of UV-vis spectrometer in UV–Vis regions showing (2)absorption bands regarding MgPc molecule. One of them is in region approximately (350nm)referred to as B-band, while the other one is in the visible areaapproximately (600nm)referred to as the Q-band. Generally, such absorption spectra have been interpreted with regard to excitation. Furthermore, the films’ thickness has been evaluated and has been indicated for being depending on the number of laser pulses. Increasing the laser pulsesresult in increasing the film’s absorbance and shifts peak position regarding all the bands toward spectra’s low energy side, thus the energy gap has been somewhat depending on the thickness of thin films. MgPc thin films were considered to be transport, also onset indirect energy gaps (E_g) have beenindicated at   (2.7 and1.4eV) regarding all the samples.Optical constant related to the absorption coefficient (?),have been estimated and it has been specified that they have been somewhat depending on the number of laser pulses.

Keywords: MgPcPhthalocyanine; Pulse laser deposition; Optical properties; UV-Vis; FTIR.