Photovoltaics, which utilizes the largest possible energy source to generate electricity, represents one of the most attractive approaches towards renewable energy future. However, the cost of current solar electricity is still too high. Future photovoltaic technologies need to have high power conversion efficiency and can be fabricated with low cost. In this project, we propose novel nanocone ...

The aim of this study is to enhance the design a multilayer and planar metamaterial that serves multiple functions, including high efficiency ultra-broadband absorption, as well acting narrowband sensor. primary feature absorber its fully structure, which enables flexible utilization two distinct absorption functionalities: achieved through application MgF2 layer, implementation Cu layer. To co...

Resonant absorbers based on nanostructured materials are promising for variety of applications including optical filters, thermophotovoltaics, thermal emitters, and hot-electron collection. One of the significant challenges for such micro/nanoscale featured medium or surface, however, is costly lithographic processes for structural patterning which restricted from industrial production of compl...

Extremely thin absorber (eta)-solar cells based on ZnO nanowires sensitized with a thin layer of CdSe have been prepared, using CuSCN as hole transporting material. Samples with significantly different photovoltaic performance have been analyzed and a general model of their behavior was obtained. We have used impedance spectroscopy to model the device discriminating the series resistance, the r...

In this paper, we present an Yb-doped Y2O3 waveguide laser fabricated by pulsed laser deposition (PLD) that is Q-switched using a mono-layer graphene saturable absorber. 140 ns pulses at a repetition rate of 1.21 MHz and pulse energy of 14 nJ are achieved at an absorbed pump power of 528 mW. Introduction: Pulsed lasers have a range of applications in areas such as medicine, material processing,...

The performance of the chalcopyrite material Cu(In,Ga)Se2 (CIGS) used as an absorber layer in thin-film photovoltaic devices is significantly affected by the presence of native defects. The deep-level transient spectroscopy (DLTS) technique is used in this work to characterize the defect properties, yielding relevant information about the defect types, their capture cross-sections, and energy l...