Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

MnPc Films Deposited by Ultrasonic Spray Pyrolysis at Low Temperatures: Optical, Morphological and Structural Properties

Version 1 : Received: 19 April 2023 / Approved: 20 April 2023 / Online: 20 April 2023 (07:43:57 CEST)

A peer-reviewed article of this Preprint also exists.

Luna Zempoalteca, A.; Hernández de la Luz, J.Á.D.; Luna Flores, A.; Luna López, J.A.; Benítez Lara, A. MnPc Films Deposited by Ultrasonic Spray Pyrolysis at Low Temperatures: Optical, Morphological and Structural Properties. Materials 2023, 16, 4357. Luna Zempoalteca, A.; Hernández de la Luz, J.Á.D.; Luna Flores, A.; Luna López, J.A.; Benítez Lara, A. MnPc Films Deposited by Ultrasonic Spray Pyrolysis at Low Temperatures: Optical, Morphological and Structural Properties. Materials 2023, 16, 4357.

Abstract

In this work, we report manganese phthalocyanine (MnPc) films obtained by ultrasonic spray-pyrolysis technique at 40°C deposited on glass substrate subjected to thermal annealing at 100 °C and 120°C. The MnPc films were characterized by UV/Vis spectroscopy, Raman spectroscopy, X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The absorption spectra of the MnPc films were studied in a wavelength range from 200 to 850 nm, where the characteristic bands of a metallic phthalocyanine known as B and Q bands were observed in this range of the spectrum. The optical energy band (Eg) was calculated by the Tauc equation. It was found that for these MnPc films, the Eg has the values of 4.41, 4.46 and 3.58 eV corresponding to as deposited, annealing 100°C and 120°C, respectively. The Raman spectra of the films showed their characteristic vibrational modes of the MnPc films. In X-ray diffractograms of these films, the characteristic diffraction peaks of a metallic phthalocyanine are observed, presenting a monoclinic phase. SEM images of these films were studied in cross section obtaining thicknesses of 2, 1.2 and 0.3 μm to as deposited, annealing 100°C and 120°C, successively. Also, in the SEM images of these films, both the average particle sizes ranging from 4 to 0.041 µm and the average diameter from 4.8 to 0.091 μm were obtained. The results agree with those reported in the literature for MnPc films deposited with other techniques.

Keywords

Manganese phthalocyanine (MnPc); Ultrasonic spray pyrolysis; UV/Vis; Raman; XRD; SEM

Subject

Chemistry and Materials Science, Organic Chemistry

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