0000000000859027

AUTHOR

Reinhard Carius

showing 4 related works from this author

Structural and electronic properties ofβ-FeSi2nanoparticles: The role of stacking fault domains

2014

We use conventional and aberration-corrected transmission electron microscopy (TEM) and ab initio calculations to investigate the structural and electronic properties of \ensuremath{\beta}-FeSi${}_{2}$ nanoparticles, which are a promising material for photovoltaic applications due to a band gap of 1 eV and a high absorption coefficient. The nanoparticles have average sizes of \ensuremath{\sim}20 nm, form aggregates, and are prepared by gas-phase synthesis. Amorphous SiO${}_{x}$ shells with thicknesses of \ensuremath{\sim}1.7 nm around \ensuremath{\beta}-FeSi${}_{2}$ cores are identified on individual nanoparticles using electron energy-loss spectroscopy, while stacking fault domains in the …

Materials scienceBand gapNanotechnologyElectronPhysik (inkl. Astronomie)Condensed Matter PhysicsElectronic Optical and Magnetic MaterialsAmorphous solidCrystallographyElectron diffractionAb initio quantum chemistry methodsddc:530SpectroscopyElectronic band structureStacking faultPhysical Review B
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Three-dimensional photonic crystal intermediate reflectors for enhanced light-trapping in tandem solar cells

2011

A three-dimensional photonic crystal intermediate reflector for enhanced light trapping in tandem solar cells is presented. The intermediate reflector consists of a transparent and conductive ZnO:Al inverted opal sandwiched in between the top amorphous silicon and bottom microcrystalline silicon cell.

Amorphous siliconPhotonsSiliconMaterials scienceLightTandembusiness.industryMechanical EngineeringTrappingchemistry.chemical_compoundchemistryMechanics of MaterialsSolar EnergyOptoelectronicsGeneral Materials ScienceZinc OxideCrystallizationbusinessAluminumPhotonic crystal
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Photonic crystal intermediate reflector in micromorph tandem solar cells

2011

Experimental and numerical evidences are presented which show that the efficiency of silicon based tandem solar-cells can be increased by incorporating a three-dimensional photonic crystal as an intermediate reflector.

animal structuresMaterials scienceTandemSiliconbusiness.industryMicromorphPhotovoltaic systemfood and beveragesPhysics::Opticschemistry.chemical_elementReflector (antenna)Solar cell efficiencyOpticschemistryOptoelectronicsPhotonicsbusinessPhotonic crystal
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3D photonic crystal intermediate reflector for micromorph thin-film tandem solar cell

2008

The concept of 3D photonic intermediate reflectors for micromorph silicon tandem solar cells has been investigated. In thin-film silicon tandem solar cells consisting of amorphous and microcrystalline silicon with two junctions of a-Si/μc-Si, efficiency enhancements can be achieved by increasing the current density in the a-Si top cell. It is one goal to provide an optimized current matching at high current densities. For an ideal photon-management between top and bottom cell, a spectrally selective intermediate reflective layer (IRL) is necessary, which is less dependent of the angle of incidence than state-of-the-art thickness dependent massive interlayers. The design, preparation and cha…

TandemSiliconbusiness.industryChemistryMicromorphchemistry.chemical_elementSurfaces and InterfacesCondensed Matter PhysicsPolymer solar cellSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsAtomic layer depositionOpticsMaterials ChemistryElectrical and Electronic EngineeringThin filmPhotonicsbusinessPhotonic crystalphysica status solidi (a)
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