Abstract

Nanostructured lead iodide particles were synthesized by applying a wet chemical synthesis route in presence of aminobenzene and fluoro-aminobenzene as ligands. The ligands were performed as the stabilizer of the particles. Two types of devices were designed using aminobenzene and fluoro-aminobenzene stabilized lead iodide. The dielectric capacitance, AC-conductivity, field-driven polarization and energy storage performances of the devices were investigated under varying temperature and frequency conditions. The electrical performance of fluoro-aminobenzene stabilized lead iodide-based device exhibited superior performance than that of aminobenzene-stabilized lead iodide-based devices. The fluoro-aminobenzene based device showed the maximum dielectric constant value 398 under the frequency of 100 Hz at 80 °C and maintained a low dielectric loss and high quality factor within the frequency range from 100 Hz to 2 kHz. Both the devices demonstrated the small polaron hopping conduction mechanism. The fluoro-aminobenzene based device maintained a fatigue-free unipolar hysteresis loop under 4 kV/mm with the maximum polarization value of 0.21 μC/cm2 and attended a stable charge and discharge energy density for the period of 103 cycles.

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