Growth and impedance analysis of pure TGAc and dye doped TGAc crystals-enhanced dielectric permittivity for energy-stora
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Growth and impedance analysis of pure TGAc and dye doped TGAc crystals‑enhanced dielectric permittivity for energy‑storage devices P. R. Deepthi1 · Anu Sukhdev1 · P. Mohan Kumar1 · J. Shanthi2 · B. C. Hemaraju3 Received: 28 April 2020 / Accepted: 5 August 2020 © Springer Nature Switzerland AG 2020
Abstract Herein, we delineate the enhancement of the dielectric properties of an anionic dye doped triglycine acetate crystal for the first time. Single crystals of pure triglycine acetate (TGAc) and reactive orange 16 (RO16) dye-doped (0.01, 0.03 mol%) triglycine acetate were synthesized with an intention to enhance the strengths of pure TGAc crystal using slow evaporation process. The crystalline structure and phase purity of the grown crystals were analyzed using Powder XRD studies. The frequency dependence of real and imaginary part of dielectric constant, loss tangent, real and imaginary part of impedance, electrical modulus and ac electrical conductivity have been investigated. The dielectric constant and dielectric loss for the grown crystals, have been found to decrease with increasing frequency. The decrease in permittivity and dielectric loss with an increase in applied field frequency is as per Maxwell–Wagner theory. The Cole–Cole plot implies that the mechanism of conduction is mainly due to bulk resistance. The enhanced dielectric constant of the doped crystals confirms the appropriateness of the developed crystals for energy storage capacitor applications. Keywords Dye doped crystal · Dielectric properties · Electrical conductivity
1 Introduction The potential of electrical energy storage is a deciding consideration for various power systems, immobile power systems, hybrid powered vehicles and pulses [1, 2]. Electric power storage is an important aspect of this. In addition, capacitors are needed to develop and can accumulate and then supply tremendous quantities of energy instantly. For military and commercial uses, this kind of ‘pulse control’ is required. Such applications require higher energy, higher power and more efficiency. Dielectric materials could be used to preserve stored energy within the frame as long as an external electrical field polarizes the electron transfers across constituent molecules or atoms. Resizing electronic devices such as condensers, necessitates novel interfacial materials with an exceptionally high relative permittivity,
mostly gained from perovskites based on ferroelectric and relaxor [3]. The present innovation is showing a fast change and its appearance on materials is unbelievable. The innovative advancement to a bigger degree is subject to the improvement of crystal growth. Hence the growth of single crystals has become foreseeable for any advancement in material science research. The electro-optic constant of a material is directly related to its dielectric constant. Such materials with low or high dielectric constant, may be needed depending on applications such as electrooptical modulator and interlayer dielectric material. The complex impedance spectroscopy is
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