Recent progresses in liquid phase crystallization enabled the fabrication of thin wafer quality crystalline silicon layers on low-cost glass substrates enabling conversion efficiencies up to 12.1%. Because of its indirect band gap, a thin silicon absorber layer demands for efficient measures for light management. However, the combination of high quality crystalline silicon and light trapping st...

In this paper, the periodic double-layer graphene ribbon arrays placed near a metallic ground plate coated by a dielectric layer are proposed and analyzed by the coupled-mode theory (CMT) to predict the perfect absorption response in the mid-infrared region. Numerical simulations of the finite-difference time-domain (FDTD) method confirm this effect and give the underlying physical origin. The ...

Superconducting Tunnel Junctions (STJ) are currently being developed as photon detectors for a wide range of applications. Interest comes from their ability to cumulate photon counting with chromaticity (i.e. energy resolution) from the Near InfraRed (NIR) to the X rays wavelengths and excellent quantum efficiency up to 80%. Resolving power can reach more than 10 in the visible. Our main goal i...

In this paper, we design and present a graphene-based “ancient coin”-type dual-band perfect metamaterial absorber, which is composed of silver layer, silicon dioxide top coin” graphene layer. The absorption performance the absorber affected by hollowed-out square in center layer geometric parameters remaining nano disk. optical properties can be changed adjusting voltage, to control dynamically...

Graphene is a powerful 2-D matter with the capability of extraordinary transparency, and tunable conductivity employed in emerging optoelectronics devices. In this article, design an electrically graphene-based perfect terahertz absorber proposed evaluated numerically. The introduced structure composed two graphene layers sharp absorption peak band. These are combline stripline separated by ins...

In this perspective, we describe a new type of photovoltaic all-carbon composites, in which single walled carbon nanotubes (SWCNTs) and fullerenes are directly co-assembled and processed in water using graphene oxide (GO) as a surfactant. Solar cells made with C 60 /SWCNTs/reduced GO as the active layer and an additional evaporated C 60 blocking layer yield a power conversion efficiency of 0.21...

Copper indium gallium selenide (CIGS)-based solar cells have exhibited greater performance than the ones utilizing cadmium telluride (CdTe) or hydrogenated amorphous silicon (a-Si: H) as absorber. CIGS-based devices are more efficient, considering their device performance, environmentally benign nature, and reduced cost. In this article, we proposed a potential CIGS-absorber-based cell with an ...

A Si-based waveguide photodetector with a response in the 1.3–1.55m wavelength range is demonstrated. The active absorption layer of the pin photodiode consists of a SiGeC alloy epitaxially grown on a Si substrate with a Ge content of 55% and a thickness of 800 Å. The external quantum efficiency for a 400m-long waveguide, measured by using a single-mode fiber coupled to the waveguide facet, is ...