Porous Silicon (PS) has found its broad application for optoelectronics devices specially solar cells applications due to its efficient antireflection coating. This material has advantages such as broaden band gap, wide absorption spectrum and high optical transmission range from 700-1000nm. In this paper, the experimental study of electrochemically prepared porous silicon structures is present...

WZD (Wavelet Z-coDec) is a component or composite video codec engineered and optimized to greatly reduce the ASIC silicon implementation area in return for a modest degradation of the R-D (rate/distortion) tradeoff. It consists of wavelet transforms organized into a carefully designed pyramid, dyadic quantization, and a novel application of Zcoding and Huffman coding to entropy code the wavelet...

Anti-reflection coatings (ARC) of dielectrics help in balancing the refractive index mismatch between silicon and air as result reducing the reflection losses but they do not cause bending of light rays which is essential for efficient light trapping of the injected light into the cell. Texturiaztion helps in both the reduction of reflection losses and light trapping due to bending of the light...

Single and multi-mode room temperature laser action was observed in GaN pyramids under strong optical pumping. The 5and 15-micron-wide hexagonal-based pyramids were laterally overgrown on a patterned GaN/AlN seeding layer grown on a (111) silicon substrate by metal-organic chemical vapor deposition. The pyramids were individually pumped, imaged, and spectrally analyzed through a high magnificat...

This work demonstrates the fabrication of metallic nanoprism (triangular nanostructure) arrays using a low-cost and high-throughput process. In the method, the triangular structure is defined by the shadow of a pyramid during angle evaporation of a metal etching mask. The pyramids were created by nanoimprint lithography in polymethylmethacrylate (PMMA) using a mould having an inverse-pyramid-sh...

design and optimization of a single crystalline silicon (c-si) solar cell is performed to achieve the maximum light conversion efficiency. various parameters such as doping concentration and thicknesses, and geometrical dimension of surface pyramids are studied. the inverted surface pyramid is used to increase the efficiency of the solar cell, and engineered oxide layer is used as the passivati...