Structural and Morphological of Pulsed Laser Deposited Magnesium Phthalocyanine (MgPc) Thin Film

Abstract

Magnesium Phthalocyanine (MgPc) was deposited on a glass substrate by pulsed laser deposition (PLD) using Q-Switching Nd: YAG laser with wavelength 1064(nm), (6Hz) Repetition rate, in addition to different laser energies (200,300,400 and 500 mJ) at room temperature under vacuum condition with (10-3torr). All films were annealed at (298K) for 1hour to attain crystallinity. X-ray diffraction of MgPc powder indicated the fact that MgPc crystallizes in polycrystalline with a monoclinic structure While comparing the MgPc of films, it’s found the intensity of characteristic peak is high as the number and energy of laser pulses increase and the crystallize is monoclinic form is observed in β-form. Miller indices, hkl, values for every one of the diffraction peaks in the spectrum of the XRD have been computed. The characteristic peak of Phthalocyanine (MgPc) is found at 2θ value 6.9137o with the hkl value of {100} for both MgPc powder and deposited thin film. The surface morphology of the films showed more uniform sized grains. EDX and FESEM analysis has shown that there has been an enhancement in the crystallinity and surface morphology as a result of the increase of laser energies and for finding the optimum parameters for which film provides more efficient structural characteristics.

Organic Thin Films Deposited by Matrix-Assisted Pulsed Laser Evaporation (MAPLE) for Photovoltaic Cell Applications: A Review

“…These small molecule compounds can be deposited relatively easily using a vacuum evaporation method or from solution being soluble in various solvents [107]. Zinc phthalocyanine (ZnPc) and magnesium phthalocyanine (MgPc) are usually deposited using laser techniques (PLD and MAPLE) [40,43,108]. ZnPc is characterized by a higher hole mobility and a higher exciton diffusion length in comparison with other phthalocyanines having a band gap value of ~1.9 eV [109,110].…”

“…ZnPc is characterized by a higher hole mobility and a higher exciton diffusion length in comparison with other phthalocyanines having a band gap value of ~1.9 eV [109,110]. MgPc has a band gap value of ~2.6 eV being the first metal phthalocyanines used in a cell structure by Kearns [18,108]. In the PV cells, metal phthalocyanines are generally involved as a single layer (in stacked structures), in BHJ with other acceptor materials or as an additional material for increasing the absorption properties of other donor polymers or perovskite materials [111,112].…”