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We report on the design, fabrication, and measurement of ultrathin film a-Si:H solar cells with nanostructured plasmonic back contacts, which demonstrate enhanced short circuit current densities compared to cells having flat or randomly textured back contacts. The primary photocurrent enhancement occurs in the spectral range from 550 nm to 800 nm. We use(More)
Three of central challenges in solar cells are high light coupling into solar cell, high light trapping and absorption in a sub-absorption-length-thick active layer, and replacement of the indium-tin-oxide (ITO) transparent electrode used in thin-film devices. Here, we report a proposal and the first experimental study and demonstration of a new ultra-thin(More)
  • A V Shah, J Meier, L Feitknecht, E Vallat-Sauvain, J Bailat, U Graf +2 others
  • 2001
Hydrogenated microcrystalline silicon (µc-Si:H)-as deposited by PECVD at low temperatures (around 200°C)-can be used to fabricate stable pin-type solar cells with conversion efficiencies over 8 %. The variety of growth forms and microstructural patterns observed for different deposition conditions is described; the requirements to be met by layers for use(More)
Angiofibromas are rare, benign, locally invasive vascular tumors, which represent 0.05-0.5% of all head and neck tumors. Most frequent site of occurrence is the posterior nasopharynx, called as nasopharyngeal angiofibromas (NA), when these arise outside the nasopharyngeal region they are termed as extranasopharyngeal angiofibromas (ENA). Only 65 cases of(More)
Bit synchronization is an important operation used at the receiving end of synchronous communication systems for providing a reference bit clock to the receiver; this reference marks the instants at which transition in data bits occur at the transmitting end. In some DPSK demodulator realizarions, like the integrate-and-dwnp scheme, the bit clock is(More)
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