Onset of vacancy-mediated high activation energy leads to large ionic conductivity in two-dimensional layered Cs2PbI2Cl2 Ruddlesden-Popper halide perovskite

Electrical Conduction Mechanisms in Gd-Substituted WO3 Ceramics: Experimental and Theoretical Approaches

“…Figure clearly provides the evidence of two distinct master curves, one at a lower temperature of 303 K and the other at a high temperature of 473 K, which signifies the two different dynamical mechanisms. The identical conductivity spectra in the lower temperature range (303–373 K) and higher temperature range (373–473 K) follows the time–temperature superposition principle, which means that temperature does not impart temperature-dependent characteristics to the microscopic mechanisms underpinning the dynamics process; instead, it causes a shift in the frequency spectrum within which these processes manifest . Hence, it is evident that in the lower temperature range of 303–373 K exhibiting NCL behavior, a singular conductivity master curve can be derived, but at higher temperatures exhibiting SPL behavior, AC conductivity defies scaling into such a unified curve.…”

“…The grain boundary contribution is shown by a bigger semicircle at lower frequencies on the Nyquist plot, while the grain contribution is represented by a tail at lower frequencies, which shows that the resistance of grain boundaries is higher in comparison to grains and is clearly depicted at temperature 303 K in Figure b. The higher grain boundary resistance is ascribed to the chaotic configuration of atoms in the vicinity of the grain boundary, leading to an augmentation in the number of electrons scattering centers by reducing their mobility . The size of the semicircle decreased with increasing temperature, revealing a decreasing resistance, which signifies a lowering of the energy barrier and therefore a significant rise in the concentration of charges .…”

Vortex flow induced self-assembly in CsPbI3 rods leads to an improved electrical response towards external analytes

“…Over the last decade, a lot of effort has been devoted to organic–inorganic halide perovskite materials for solar cell applications, 16–18 as well as various optoelectronic and energy harvesting applications. 19–30 However, compared to the hybrid CH 3 NH 3 PbX 3 compounds, the all-inorganic cesium lead halide (CsPbX 3 ) perovskite nanocrystals (NCs) demonstrate exciting luminescence properties and better temperature stability. 31 Despite this remarkable achievement with perovskite nanocrystals (NCs), the self-assembly of metal halide perovskite nanostructures has not yet gained much attention.…”

Halide Tunablility Leads to Enhanced Biomechanical Energy Harvesting in Lead-Free Cs2SnX6-PVDF Composites

“…Consequently, the development of lead-free perovskites is necessary for a sustainable future. Several lead-free perovskites have so far been developed using a variety of metal cations, including tin (Sn 2+ ), germanium (Ge 2+ ), bismuth (Bi 3+ ), and antimony (Sb 3+ ). , There have also been reports of replacement by lanthanides, alkaline metals, partial replacement with different metals, and layered perovskites with double metal sites. − The development of adaptable self-powered nanogenerators for energy harvesting applications that work without frequent recharging is being pursued actively, being propelled by the rapid growth of smart electronics. , Piezoelectric nanogenerators (PENGs) have shown significant promise in achieving portable, long-lasting, and affordable energy harvesting from different types of mechanical vibrations in the environment. , The first strategy toward achieving competent PENGs, is the realization of a composite material, constituted of a flexible and stable piezoelectric polymer with regulated loading of perovskite in its matrix, capable of mechanical energy harvesting. The advantages of piezoelectric polymers over conventional ceramic materials, in particular polyvinylidene-fluoride (PVDF), include excellent temperature stability, greater chemical resistance, a high piezoelectric coefficient, and ease of manufacture. − PVDF displays four crystalline phases namely α, β, γ, and δ, depending on the chain conformation.…”