Study of Structural, Optical and AC Electrical Properties of Chloroindium Phthalocyanine

The present study aimed to investigate the AC electrical properties of chloroindium phthalocyanine (ClInPc) in order to evaluate its conduction mechanism. For this purpose, sandwich devices of ClInPc with aluminum electrodes (Al/ClInPc/Al) were fabricated. The measurements indicated that the capacitance and loss factor increased by an increase in the temperature and decreased by an increase in the frequency. In addition, measurement results obtained are consistent with Goswami and Goswami’s model. AC conductivity is confirmed by the equation σ ( ω ) = Aω S , which is commonly used for charge transport with hopping or tunneling mechanism. In this study, the conduction mechanism was studied with correlated barrier hopping at the frequency range of 100 Hz–1 kHz and overlapping large-polaron tunneling models at the frequency range of 1 kHz–100 kHz. Furthermore, the activation energies of the device were achieved as a function of frequency. The structure of the ClInPc thin film was determined by x-ray diffraction and scanning electron microscopy images. Additionally, by using the UV analysis of the ClInPc thin film, the optical band gap was obtained as 2.9 eV and the absorption bands Q and B were observed in the visible region.