NonlinearI–Vrelations and hysteresis in solid state devices based on oxide mixed-ionic–electronic conductors

Abstract

The current-voltage, I-V, relations as well as the defect distributions are calculated for solid state devices in which the acceptors are mobile. The devices are of the metal|oxide|metal (MOM) type, where the oxide is a mixed-ionic-electronic conductor. The electrodes are blocking for material exchange. I-V relations are calculated for cyclic voltammetry, high amplitude ac voltage and low amplitude ac voltage from which the ac impedance is derived. The results exhibit nonlinear I-V relations, energy storage, hysteresis, negative resistance and quasi-switching.

The interface effect on the I–V curves and analysis of ionic diffusion coefficients of polycrystalline CuIn4Te6

“…A similar behavior is found in series C, but with some slightly hysteresis effects. These behaviors suggest that during these measurements the sample had a low ionic mobility that did not lead to an important ionic redistribution on the time scale of measurements [5,16]. Anyway, it should be noted that I(t) exhibits a great diversity of shapes, therefore indicating that ion motion is taking place.…”

“…The intensity discontinuity observed in series B in the range between 17 and 22 V is remarkable, in such a way that in order to recover the increasing behavior of I with increasing V m , the application of higher voltages is necessary. This suggests some kind of memory or resistance switching effect [16] that would be associated with the ionic motion. An alternative approach for studying the different changes taking place in the sample is to compute the parameter R s = V m /I.…”

“…Anyway, it should be noted that I(t) exhibits a great diversity of shapes, therefore indicating that ion motion is taking place. On the contrary, in series B, the I-V relation is non-linear and shows a curve similar to an asymmetrical skewed tanh, suggesting that the sample had a high ionic mobility during series B measurements, in such a way that ions had time to be redistributed on the time scale of measurements [5,16,17]. Likewise, more pronounced hysteresis effects are observed, indicating that a steady state has not been completely reached [3].…”

“…In particular, Riess et al [16][17][18] have calculated and discussed in detail the influence of the ionic mobility, contact potential, space charge, sample thickness and the pinning of the charge carriers at the boundaries, in the I-V relations of metal/semiconductor/metal devices for p-type semiconductors with a single mobile acceptor ion. A previous work has shown different hysteresis cycles and I-V curves in three single crystals with two mobile ions belonging to the Cu n−3 -In n+1 -Te 2n system.…”

Electrical conductivity of LTA-zeolite in the presence of poly(vinyl alcohol) and poly(vinyl pyrrolidone) polymers

“…Each sodalite cage and channel contains eight cations and one cation respectively inside and the remaining 24 cations are located inside the cavity facing the sodalite cages . Due to pore opening of the zeolites they are used for a wide range of applications such as gas separation and adsorption, ion exchange and catalysis . It has already been reported that water molecules can easily diffuse inside the cavity and cages.…”