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- W2531248077 abstract "T single layer graphene sheets can be synthesized with epitaxial substrate and is stable from thermodynamic, interfacial, Euler, Landau-Pearls, layer agglomeration, wrinkle, corrugation considerations. Confirmed using Raman spectroscopy, it is a distinct allotrope of carbon and the Nobel Prize in Physics went to A. Geim and K. Novosolev in 2010 for their work on graphenes. One of the interesting areas of their application is in solar cells. The use of graphene layer in solar cells can lead to higher light to electricity conversion as much as 15% and also lead to reduction in production costs. Graphene layer can replace the thin charge-carrying silicon layer that is expensive as shown by Peking University, China recently. Graphene can be used as an electrode. This is less expensive to fabricate. Light to electricity conversion efficiency of about 8.6 10.0% was shown to increase to 14.6% by coating a 65 nm thick layer TiO2 atop silicon graphene solar cell. The amount of visible light reflected from the silicon surface is decreased to less than 10% from 30% on account of the coating. Siemens has been developing PV photovoltaic cells using conducting polymers and discovered more allotropes of carbon such as fullerenes, graphenes, CNTs, etc. Thin film of conducting polymer and fullerenes are sandwiched between two electrodes. Photons are absorbed, electrons are generated and routed by fullerenes/graphenes with higher electron mobility toward the electrode. The optimization of solvents, temperatures and drying conditions for better blends of fullerenes and plastic lead to doubling of the power output. This was attributable to more jumps of electrons from plastic to fullerenes and more regular structuring of fullerenes and polymer. Further improvements in light to electricity conversion were achieved by manipulation of nanomaterials and change to nanocoating methods. AR, antireflection coatings can be prepared using graphenes. This cuts down the losses of light by reflection and increases the light to power conversion efficiency. Kal Renganathan Sharma, J Phys Chem Biophys 2013, 3:5 http://dx.doi.org/10.4172/2161-0398.S1.002" @default.
- W2531248077 created "2016-10-21" @default.
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- W2531248077 date "2013-10-31" @default.
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- W2531248077 title "On the use of graphene in solar cells" @default.
- W2531248077 hasPublicationYear "2013" @default.
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