Optical and Magnetic Properties of Manganese Phthalocyanine Thin Films

Metallo-phthalocyanine-based thin films have been widely used in applications, such as electronic and photonic devices, organic photovoltaic devices, and gas sensors. Thin films of manganese phthalocyanine with different nanostructures are prepared onto Silicon and glass substrates. Both the magnetic and optical properties are studied. The absorption spectra show prominent peaks in the B- and Q-band as expected for phthalocyanine molecules. The energy band gap is measured from the optical spectrum of the transmission data. From the peak in the B-band, the fundamental energy gap near 3.6 eV can be estimated, which is higher than for iron phthalocyanine thin films. A comparison of the magnetic measurements of manganese phthalocyanine thin films with iron phthalocyanine thin films is made. These results provide insight towards designing organic-based spintronic devices.