Abstract
In this article, the dielectric properties of poly (9-vinylcarbazole) (PVK) and ferrocene-doped PVK thin films are studied. The thin films were grown by the isothermal solution casting technique. Dielectric properties of grown films were studied as function of ferrocene concentration, frequency, and temperature. The relative permittivity (ε′) is increased with increasing ferrocene percentage (~1%) due to the free charge carriers. The relative permittivity decreases for higher ferrocene percentage (~2%). However, the relative permittivity of PVK and ferrocene-doped PVK samples remains almost constant for studied temperature range (313–413 K). The frequency dependence of tan δ for all samples is studied. The frequency dependence of dielectric parameter exhibits frequency dispersion behavior, which suggests all types of polarization present in the lower frequency range. The loss tangent (tanδ) values are larger at higher temperatures in the low frequency region. However, the tan δ values at different temperatures are almost similar in the high frequency region. It is observed that the relative permittivity is maximum, dielectric loss is minimum, and AC conductivity is minimum for 1% ferrocene doped PVK as compared to pure PVK and 2% ferrocene doped PVK samples.
Highlights
It is widely known that the polymers are useful for the growth of state-of-the-art economical devices
Tang et al studied the properties of PVK and proposed that PVK can be applicable as a high-potential organic polymer cathode for dual-intercalation Na-ion batteries [10]
Thin films of pure PVK and ferrocene doped were grown by the isothermal solution Thintechnique
Summary
It is widely known that the polymers are useful for the growth of state-of-the-art economical devices. Researcher’s growing interest in polymers in electronics is widely defensible by notable advantages in manufacturing of electro-optic devices, such as photovoltaic cells, polymeric field effect transistors, and polymeric light emitting diodes [1,2,3]. The poly (N-vinyl carbazole) (PVK) is a well-known hole transport polymer; this material is suitable for clarifying the effect of the injected holes on the breakdown process in polymer thin film [4]. Tang et al studied the properties of PVK and proposed that PVK can be applicable as a high-potential organic polymer cathode for dual-intercalation Na-ion batteries [10]. Studies on electroluminescence properties of pure PVK were recommended that the PVK is an excellent host material for phosphorescent polymer light-emitting diodes [12,13,14]. Frequency-dependent dielectric breakdown in the PVK thin films was studied by several researchers [15,16]
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