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Organic molecule stabilized bismuth iodide nanoparticles: a hybrid system with multifunctional physical properties

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Abstract

An organic–inorganic hybrid system of aniline stabilized bismuth iodide nanoparticles (ABI) was synthesized and investigated for its dielectric properties, AC-conductivity, polarization hysteresis and non-volatile memory performances. The X-ray diffraction result indicates the single phase crystalline nature of the nanoparticles and a microscopic image shows the homogeneous distribution of the bismuth iodide nanoparticles within the organic matrix. The material has exhibited a moderate dielectric performance via an interfacial polarization mechanism. The decrease in dielectric constant with frequency is correlated with the carrier concentration and diffusion potential, and the behaviour revealed that the halide ion mediated polaron migration controls the overall relaxation and conductivity properties of the material. Octahedral distortion of bismuth iodide, through halide ion migration, induced a hysteresis loop in polarization–electric field (PE) characteristics. The device fabricated with the aniline stabilized bismuth iodide nanoparticles exhibited a space-charge limited current and trap assisted tunneling mechanism for the charge transport process. The non-volatile property reveals that the device has the ability to store binary information and has potential for memory applications.

Graphical abstract: Organic molecule stabilized bismuth iodide nanoparticles: a hybrid system with multifunctional physical properties

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Article information


Submitted
15 Nov 2019
Accepted
18 Dec 2019
First published
19 Dec 2019

Phys. Chem. Chem. Phys., 2020, Advance Article
Article type
Paper

Organic molecule stabilized bismuth iodide nanoparticles: a hybrid system with multifunctional physical properties

S. K. Ghosh, V. K. Perla and K. Mallick, Phys. Chem. Chem. Phys., 2020, Advance Article , DOI: 10.1039/C9CP06183E

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