<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Demonstration and Analysis of the Photocurrent by absorption of two sub-bandgap photons in a quantum dot intermediate band solar cell"^^ . "In order to surpass the efficiency limit of single gap solar cells, intermediate band solar cells (IBSC) have to fulfill two requirements: the production of extra photocurrent by absorption of sub-bandgap photons in electronic transitions involving the intermediate band (IB) and the preservation of a high output voltage, not limited by the existence of this band. This work presents experimental evidence of the production of electron-hole pairs by absorption of two sub-bandgap photons in IBSC prototypes fabricated with InAs/GaAs QD material. The experiments were carried out at low temperatures using a specifically designed modulated photocurrent measurement set-up with two light beams. The results are analysed with the help of a simple equivalent circuit model. This analysis is also used to highlight the relevance of the two-photon mechanism demonstrated in the experiment. It is discussed that, although the absorption of sub-bandgap photons in one of the IB transitions and subsequent thermal escape of carriers is a sufficient mechanism to obtain a photocurrent enhancement, the absorption of sub-bandgap photons in both transitions involving the IB is a requisite for the voltage preservation in IBSCs."^^ . "2008" . . . "WIP-Renewable Energie"^^ . . "WIP-Renewable Energie"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Enrique"^^ . "Cánovas Díaz"^^ . "Enrique Cánovas Díaz"^^ . . "Antonio"^^ . "Martí Vega"^^ . "Antonio Martí Vega"^^ . . "Antonio"^^ . "Luque López"^^ . "Antonio Luque López"^^ . . "C.D."^^ . "Farmer"^^ . "C.D. Farmer"^^ . . "Pablo"^^ . "García-Linares Fontes"^^ . "Pablo García-Linares Fontes"^^ . . "Colin"^^ . "Stanley"^^ . "Colin Stanley"^^ . . "David"^^ . "Fuertes Marrón"^^ . "David Fuertes Marrón"^^ . . "Elisa"^^ . "Antolín Fernández"^^ . "Elisa Antolín Fernández"^^ . . . . "23rd European Photovoltaic Solar Energy Conference"^^ . . . . . "Valencia, España"^^ . . . . . . "Demonstration and Analysis of the Photocurrent by absorption of two sub-bandgap photons in a quantum dot intermediate band solar cell (PDF)"^^ . . . "INVE_MEM_2008_55792.pdf"^^ . . . "Demonstration and Analysis of the Photocurrent by absorption of two sub-bandgap photons in a quantum dot intermediate band solar cell (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Demonstration and Analysis of the Photocurrent by absorption of two sub-bandgap photons in a quantum dot intermediate band solar cell (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Demonstration and Analysis of the Photocurrent by absorption of two sub-bandgap photons in a quantum dot intermediate band solar cell (Other)"^^ . . . . . . "small.jpg"^^ . . . "Demonstration and Analysis of the Photocurrent by absorption of two sub-bandgap photons in a quantum dot intermediate band solar cell (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Demonstration and Analysis of the Photocurrent by absorption of two sub-bandgap photons in a quantum dot intermediate band solar cell (Other)"^^ . . . . . . "preview.jpg"^^ . . "HTML Summary of #3578 \n\nDemonstration and Analysis of the Photocurrent by absorption of two sub-bandgap photons in a quantum dot intermediate band solar cell\n\n" . "text/html" . . . "Energías Renovables"@es . "Renewable Energy"@en . . . "Física"@es . "Physics"@en . .