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MnPc Films Deposited by Ultrasonic Spray Pyrolysis at Low Temperatures: Optical, Morphological and Structural
Anayantzi Luna Zempoalteca1, José Álvaro David Hernández de la Luz1, Adan Luna Flores2
1Centro de Investigaciones en Dispositivos Semiconductores, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Prolongación 14 Sur, Colonia Jardines de San Manuel, Puebla 72570, Mexico.
Manganese phthalocyanine (MnPc) films were synthesized via ultrasonic spray-pyrolysis and annealed, showing significant changes in optical energy band gap and film thickness. These findings align with existing research on MnPc film deposition.
Area of Science:
- Materials Science
- Nanotechnology
- Physical Chemistry
Background:
- Phthalocyanines are versatile organic semiconductors with applications in electronics and optics.
- Manganese phthalocyanine (MnPc) exhibits unique electronic and optical properties.
- Thin film deposition techniques are crucial for device fabrication.
Purpose of the Study:
- To investigate the effect of thermal annealing on the properties of MnPc films.
- To characterize MnPc films deposited by ultrasonic spray-pyrolysis.
- To determine the optical energy band gap and structural properties of MnPc films.
Main Methods:
- Ultrasonic spray-pyrolysis for MnPc film deposition at 40 °C.
- Thermal annealing of MnPc films at 100 °C and 120 °C.
- Characterization using UV/Vis spectroscopy, Raman spectroscopy, X-Ray Diffraction (XRD), and Scanning Electron Microscopy (SEM).
Main Results:
- UV/Vis spectroscopy revealed characteristic B and Q bands, with optical energy band gaps of 4.41 eV (as-deposited), 4.46 eV (100 °C), and 3.58 eV (120 °C).
- XRD confirmed a monoclinic phase for MnPc films.
- SEM analysis showed a decrease in film thickness from 2 μm (as-deposited) to 0.3 μm (120 °C) and particle size reduction.
Conclusions:
- Thermal annealing significantly impacts the optical and structural properties of MnPc films.
- Ultrasonic spray-pyrolysis is a viable technique for producing MnPc films with tunable properties.
- The observed changes in band gap and thickness suggest potential for tailored applications in optoelectronics.
