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Abstract
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| This paperpresentsadetailedbalanceanalysisofasolarthermophotovoltaicsystemcomprisingan opticalconcentrator,acut-offbroadbandabsorberandemitter,andsinglejunctionphotovoltaiccells workingattheradiativelimitwithanintegratedback-sidereflectorinaconfigurationinwhichthecells enclosetheemittertoformanopticalcavity.Theanalysisincludestheeffectofmultiplevariableson the systemperformance(efficiencyandelectricalpowerdensity),suchastheconcentrationfactor,the emitter-to-absorberarearatio,theabsorberandemittercut-offenergies,thesemiconductorband-gap energy andthevoltageofthecells.Furthermore,theeffectofopticallosseswithinthecavitysuchas those attributedtoaback-sidereflectorwithreflectivitylowerthanoneortoasemi-openopticalcavity is alsoincluded.Oneofourmainconclusionsisthatforaplanarsystemconfiguration(theemitter,the cells andtheabsorberhavethesamearea)thecombinationoflowconcentrationandaspectrally selectiveabsorberprovidesthehighestsystemefficiencies.Theefficiencylimitofthiskindofsystemsis 45.3%, whichexceedstheShockley?Queisserlimitof40.8%(obtainedforasinglejunctionsolarcell, directlyilluminatedbythesun,workingundermaximumconcentrationandwithanoptimized band-gap). Thissystemalsohasthegreatbenefitofrequiringaverylowconcentrationfactorof4.4suns. | |
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International
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Si |
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JCR
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Si |
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Title
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Solar Energy Materials and Solar Cells |
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ISBN
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0927-0248 |
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Impact factor JCR
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4,542 |
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Impact info
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Volume
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Journal number
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From page
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2137 |
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To page
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2147 |
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Month
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SIN MES |
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Ranking
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