Sound velocity in perovskite manganites La0.67Ca0.33MnO3 with different grain sizes

Photovoltaic Performance of Perovskite Solar Cells with Different Grain Sizes.

Perovskite solar cells exhibit improved photovoltaic parameters with increasing perovskite grain size. The larger photocurrent is due to the enhanced absorption efficiency for thicker perovskite layers. The larger open-circuit voltage (VOC ) is ascribed to the reduced trap-assisted recombination for the larger grains. As a result, the power conversion efficiency exceeds 19% at best. Further imp...

Surfaces of the perovskite manganites La1-xCaxMnO3

Corrosion behaviour of AZ31 magnesium alloy with different grain sizes in simulated biological fluids.

The corrosion behaviour of AZ31 magnesium alloy with different grain sizes immersed in simulated body fluids was compared in chloride solution (8 gl(-1)) and in phosphate-buffer solution (PBS). The influence of immersion time was also analyzed. Electrochemical techniques such as open circuit potential, polarization curves, transient currents and electrochemical impedance spectroscopy, complemen...

Simulating vertical flow wetlands using filter media with different grain sizes with the HYDRUS Wetland Module

In this study, the simulation results of four vertical flow wetland systems using the HYDRUS Wetland Module are presented. The four wetland systems comprise three single-stage pilot scale systems and one full-scale two-stage system. The main difference between these systems is the filter media used, referred to as fine media, i.e., sand with a grain size distribution 0.063–4 mm, or coarse media...

Structures with pistes - different sizes

We generalize [5] and introduce structures with pistes which may have different number of models in every cardinality. 1 Structures with pistes–general setting. Assume GCH. As in [5], the first part (1.1) describes this ”linear” part of conditions in the main forcing. It is called a wide piste and incorporates together elementary chains of models of different cardinalities. The main forcing, de...