نتایج جستجو برای: si solar cells
تعداد نتایج: 1548642 فیلتر نتایج به سال:
Though environmental improvement has been claimed for the application of nanotechnology to solar cells, several characteristics of the fullerene-based organic, and the dye-sensitized nanoparticulate, solar cell are not conducive to such improvement. These include relatively high energy and materials inputs in the production of nanoparticles, a relatively low solar radiation to electricity conve...
COVER ARTICLE Atwater and Lewis et al. Si microwire-array solar cells PERSPECTIVE Park and Holt Recent advances in nanoelectrode achitecture for photochemical hydrogen production
We present a case that passivated contacts based on a thin tunneling oxide layer, combined with a transport layer with properly selected workfunction and band offsets, can lead to high efficiency c-Si solar cells. Passivated contacts contribute to cell efficiency as well as design flexibility, process robustness, and a simplified process flow. Material choices for the transport layer are examin...
UNLABELLED Silicon/organic hybrid solar cells have recently attracted great attention because they combine the advantages of silicon (Si) and the organic cells. In this study, we added a patterned passivation layer of silicon nitride (SiNx:H) onto the rear surface of the Si substrate in a Si/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) ( PEDOT PSS) hybrid solar cell, enabling an im...
This paper reports on an initial assessment of the direct growth of In(Ga)As/GaAs quantum dots (QDs) solar cells on nanostructured surface Si substrate by molecular beam epitaxy (MBE). The effect of inserting 40 InAs/InGaAs/GaAs QDs layers in the intrinsic region of the heterojunction pin-GaAs/n⁺-Si was evaluated using photocurrent spectroscopy in comparison with pin-GaAs/n⁺-Si and pin-GaAs/GaA...
UNLABELLED Periodic silicon nanocones (SiNCs) with different periodicities are fabricated by dry etching of a Si substrate patterned using monolayer polystyrene (PS) nanospheres as a mask. Hybrid Si/ PEDOT PSS solar cells based on the SiNCs are then fabricated and characterized in terms of their optical, electrical, and photovoltaic properties. The optical properties of the SiNCs are also inv...
Solar cells manufactured on boron-doped Czochralski-grown silicon (Cz-Si) degrade in performance when exposed to light or minority carriers are injected in the dark until a stable efficiency is reached. This effect, which is now known for almost 30 years, is due to the activation of a specific metastable defect in the Cz-Si material. Although a conclusive explanation of the effect is still to b...
We use optical, photocurrent and photothermal deflection spectroscopies to study defects in microcrystalline silicon Ž . mc-Si thin films and diamond layers. Enhanced light absorption in mc-Si films and solar cells is due to several contributions: light scattering, change in the optical transition probability for strained and surface atoms and residual Ž y1 amorphous fraction. Low defect densit...
Monolithic integration of III-V compound semiconductors on silicon is highly sought after for high-speed, low-power-consumption silicon photonics and low-cost, light-weight photovoltaics. Here we present a GaAs/Si direct fusion bonding technique to provide highly conductive and transparent heterojunctions by heterointerfacial band engineering in relation to doping concentrations. Metal- and oxi...
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