A 20-Gbps optical light-based WiFi (LiFi) transport system employing vertical-cavity surface-emitting laser (VCSEL) and external light injection technique with 16-quadrature amplitude modulation (QAM)-orthogonal frequency-division multiplexing (OFDM) modulating signal is proposed. Good bit error rate (BER) performance clear constellation map are achieved in our proposed LiFi systems. An system, delivering 16-QAM-OFDM over a 6-m free-space link, data of 20 Gbps, successfully demonstrated....

This paper demonstrates the application of a broadband luminescent downshifting (LDS) layer with multiple species europium (Eu)-doped silicate phosphors using spin-on film technique to enhance photovoltaic efficiency crystalline silicon solar cells. The surface morphology deposited was examined scanning electron microscope (SEM). chemical composition Eu-doped analyzed energy-dispersive X-ray spectroscopy (EDS). fluorescence emission characterized photoluminescence (PL) measurements at room...

This study characterized the plasmonic scattering effects of indium nanoparticles (In NPs) on front surface and silver (Ag rear a thin silicon solar cell according to external quantum efficiency (EQE) photovoltaic current–voltage. The EQE response indicates that, at wavelengths 300 800 nm, ratio number photo-carriers collected incident photons shining Si was enhanced by In NPs, 1,000 1,200 Ag NPs. These results demonstrate effectiveness combining broadband two metals in enhancing overall...

Abstract In this study, the plasmonic light scattering of aluminum (Al), indium (In), and sliver (Ag) nanoparticles (NPs) deposited on silicon solar cells was demonstrated. For comparison, dimensions all NPs were maintained at 17–25 nm with a coverage approximately 30–40% through control film deposition thermal annealing conditions. Absorbance surface plasmon Raman used to examine different localized resonances (LSPRs) proposed NPs. Optical reflectance, external quantum efficiency (EQE)...

Performances of textured crystalline-silicon (c-Si) solar cells enhanced by silver nanoparticles (Ag-NPs) and indium (In-NPs) plasmonic effects are experimentally demonstrated compared. Plasmonic integrated into c-Si can further increase the absorption enhance short-circuit current density (Jsc) cell. To examine profile proposed metallic particles, average diameter coverage In-NPs at 17.7 nm (19.07 nm) 30.5% (35.1%), respectively, were obtained using scanning electron microscopy. Optical...

Luminescent down-shifting (LDS) spectral conversion is a feasible approach to enhancing the short-wavelength response of single junction solar cells. This paper presents optical and electrical characteristics LDS layers containing species or two Eu-doped phosphors applied front surface silicon cells via spin-on coating. The chemical composition, morphology, fluorescence emission were respectively characterized using energy-dispersive X-ray analysis, imaging, photoluminescence measurements....

A full-duplex radio-over-fiber transport system based on an Fabry-Perot laser diode (FP LD) with optical bandpass filter at the central station, as well employing circulator a fiber Bragg grating base is proposed and demonstrated. Good transmission performances estimated by bit-error rate eye diagram are obtained in our systems. Since systems use only FP LD light source for both down-link up-link transmissions, it reveals prominent alternative advantages simplicity cost.

This paper reports on efforts to enhance the photovoltaic performance of textured silicon solar cells through application a layer Eu-doped silicate phosphor with particles various dimensions using spin-on film technique. We examined surface profile and phosphors in optical microscopy J-image software. Optical reflectance, photoluminescence, external quantum efficiency were used characterize luminescent downshifting (LDS) light scattering layer. Current density-voltage curves under AM 1.5G...

This study characterized the electrical and optical properties of single-junction GaAs solar cells coated with antireflective layers silicon dioxide (SiO₂), indium tin oxide (ITO), a hybrid layer SiO₂/ITO applied using Radio frequency (RF) sputtering. The conductivity transparency ITO film were prior to application on cells. Reverse saturation-current ideality factor used evaluate passivation performance various coatings Optical reflectance external quantum efficiency response coatings....

In this study, we sought to enhance the output power and conversion efficiency of textured silicon solar cells by layering two-dimensional indium nanoparticles (In NPs) within a double-layer (SiNx/SiO2) antireflective coating (ARC) induce plasmonic forward scattering. The effects were characterized using Raman scattering, absorbance spectra, optical reflectance, external quantum efficiency. We compared electrical performance with without single layers double NPs. cell layer NPs (16.97%) was...

Thin-film solar cells have the potential to substantially reduce material cost of photovoltaic devices. However, increase amount light absorbed in thin active layer, trapping is a critical concern developing thin-film cells. In this study, we investigated suitability using localized surface plasmons indium nanoparticles (In NPs) on TiO2 space layers various thicknesses enhance absorption silicon (Si) The experimental results demonstrated how combined effects incident plasmonics scattering,...

A novel cost-effective radio-over-fiber (ROF)/fiber-to-the-X (FTTX)/CATV hybrid three-band transport system based on direct modulation of a distributed feedback laser diode (DFB LD) with multi-wavelength output characteristic is proposed and experimentally demonstrated. Radio-frequency (RF) (1.25 Gbps/6 GHz) signal modulation, as well baseband (BB) (622 Mbps) CATV (channels 2-78) signals external remodulation are successfully transmitted simultaneously. Low bit error rate (BER) clear eye...

In this study, we sought to enhance the photovoltaic performance of silicon solar cells by coating them (via spin-on film technique) with a layer SiO2 containing plasmonic indium-tin-oxide nanoparticles (ITO-NPs) various concentrations. We demonstrated that surface plasmon resonance absorption, morphology, and transmittance ITO-NPs dispersed in at concentrations (1-7 wt%). also assessed scattering effects within without sub-layer ITO terms optical reflectance, external quantum efficiency,...

In this study, we examined efforts to increase the photovoltaic performance of GaAs single-junction solar cells using spectral conversion layers, respectively, composed europium-doped (Eu-doped) phosphors, ytterbium/erbium-doped (Yb/Er-doped) and a combination Eu-doped Yb/Er-doped phosphors. Spin-on film deposition was used apply all which had total phosphor concentration 3 wt%. The chemical compositions phosphors were by energy-dispersive X-ray spectroscopy. fluorescence emissions confirmed...