Abstract Ultrathin and broadband metamaterial absorber with loaded four lumped resistors is proposed analyzed. The reported design based on increasing the absorptivity by reducing reflection transmission coefficients simultaneously. Therefore, continuous metallic ground used to achieve zero while reduced matching impedance of free space (Z = Z 0 or μ r ε ). Additionally, electric magnetic reson...

in this study, estimation of global and diffuse solar radiations of selected cities in nigeria was carried out to assess the feasibility of solar energy utilization. the results of this work show the variation of direct and diffuse component of solar radiation in summer and winter months. the contribution of diffuse solar radiation is high during the monsoon months whereas sky conditions are cl...

The diffusion of substrate material into absorbing layer and oxidation metal or cermet nanoparticles at high temperatures are known as inevitable problems the solar selective absorbers. In this study, we consider use textured stainless steel (SS) surface coated with a protective AlCr oxide temperature absorber. SS was prepared by ion etching techniques deposited RF magnetron sputtering. absorpt...

A novel, camera-based method for direct implied open-circuit voltage (iVOC) imaging via the use of a single bandpass filter (s-BPF) is developed large-area photovoltaic solar cells and precursors. The photoluminescence (PL) emission imaged using narrow BPF with centre energy inside high-energy tail PL emission, utilising close-to-unity nearly constant absorptivity typical devices in this range....