Abstract
The charge carrier transport properties and conduction mechanism of boron subphthalocyanine chloride (Cl-BsubPc) thin film based junction was analyzed by using current-voltage (I-V) characteristics and dielectric spectroscopy technique. I-V characteristic of ITO/Cl-BsubPc/Al junction confirmes the domination of space charge limited conduction (SCLC) in the high voltage region (7–9 V). The AC conductivity study indicates the presence of frequency induced hopping conduction mechanism in Cl-BsubPc thin film with hopping relaxation time of 16.6–4.1 ms. The temperature dependence of AC conductivity suggests that conduction in the films dominated by hopping of carriers between the localized states at low temperature and movements of thermally excited carriers from energy levels within the band gap at higher temperature. The activation energy of the charge carriers responsible for conduction was found to lie between 0.35–0.40 eV.
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