0000000000897004

AUTHOR

Andreas Bielawny

showing 3 related works from this author

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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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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Micromorph silicon tandem solar cells with fully integrated 3D photonic crystal intermediate reflectors

2010

A 3D photonic intermediate reflector for textured 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/c-Si, efficiency enhancements can be achieved by increasing the current density in the a-Si top cell providing 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. We present the first fully-integrated 3D photonic thin-film IRL device incorporated on a planar substrate. Using a ZnO inverted opal structure the external quantum eff…

Materials scienceSiliconTandembusiness.industryMicromorphchemistry.chemical_elementSolar energyPolymer solar cellOpticschemistryOptoelectronicsQuantum efficiencyPhotonicsbusinessPhotonic crystalSPIE Proceedings
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