Conduction mechanisms in the magnetic insulator [(CH3)2NH2]2CoCl4

The current work proposed the application of methylammonium lead iodide (MAPbI3) perovskite microrods toward photo resistor switches. A metal-semiconductor-metal (MSM) configuration with a structure of silver-MAPbI3(rods)-silver (Ag/MAPbI3/Ag) based photo-resistor was fabricated. The MAPbI3 microrods were prepared by adopting a facile low-temperature solution process, and then an independent MAPbI3 microrod was employed to the two-terminal device. The morphological and elemental compositional studies of the fabricated MAPbI3 microrods were performed using FESEM and EDS, respectively. The voltage-dependent electrical behavior and electronic conduction mechanisms of the fabricated photo-resistors were studied using current–voltage (I–V) characteristics. Different conduction mechanisms were observed at different voltage ranges in dark and under illumination. In dark conditions, the conduction behavior was dominated by typical trap-controlled charge transport mechanisms within the investigated voltage range. However, under illumination, the carrier transport is dominated by the current photogenerated mechanism. This study could extend the promising application of perovskite microrods in photo-induced resistor switches and beyond.

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Enhancement of conductivity and conduction mechanisms in hybrid epoxy based nanocomposites for microelectronic applications

Materials Science and Engineering B ◽

10.1016/j.mseb.2020.115035 ◽

2021 ◽

Vol 266 ◽

pp. 115035

Author(s):

S. Moussa ◽

F. Namouchi ◽

H. Guermazi ◽

S. Guermazi

Keyword(s):

Conduction Mechanisms

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Tunneling conduction mechanisms in strontium ferromolybdate ceramics with strontium molybdate dielectric intergrain barriers

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2020.158526 ◽

2021 ◽

Vol 860 ◽

pp. 158526

Author(s):

Gunnar Suchaneck ◽

Nikolay Kalanda ◽

Evgenij Artiukh ◽

Marta Yarmolich ◽

Nikolai A. Sobolev

Keyword(s):

Conduction Mechanisms ◽

Tunneling Conduction

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Tetragonal–Cubic Phase Transition and Low-Field Dielectric Properties of CH3NH3PbI3 Crystals

Materials ◽

10.3390/ma14154215 ◽

2021 ◽

Vol 14 (15) ◽

pp. 4215

Author(s):

Roxana E. Patru ◽

Hamidreza Khassaf ◽

Iuliana Pasuk ◽

Mihaela Botea ◽

Lucian Trupina ◽

...

Keyword(s):

Dielectric Properties ◽

Current Knowledge ◽

Cubic Phase ◽

Relaxation Processes ◽

Temperature Dependent ◽

Thermally Activated ◽

Low Field ◽

Conduction Mechanisms ◽

Temperature Ranges ◽

Nyquist Plots

The frequency and temperature dependence of dielectric properties of CH3NH3PbI3 (MAPI) crystals have been studied and analyzed in connection with temperature-dependent structural studies. The obtained results bring arguments for the existence of ferroelectricity and aim to complete the current knowledge on the thermally activated conduction mechanisms, in dark equilibrium and in the presence of a small external a.c. electric field. The study correlates the frequency-dispersive dielectric spectra with the conduction mechanisms and their relaxation processes, as well as with the different transport regimes indicated by the Nyquist plots. The different energy barriers revealed by the impedance spectroscopy highlight the dominant transport mechanisms in different frequency and temperature ranges, being associated with the bulk of the grains, their boundaries, and/or the electrodes’ interfaces.

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