@inproceedings{HammerschmidtLockauBurgeretal.2012, author = {Hammerschmidt, Martin and Lockau, Daniel and Burger, Sven and Schmidt, Frank and Schwanke, Christoph and Kirner, Simon and Calnan, Sonya and Stannowski, Bernd and Rech, Bernd}, title = {3D optical modeling of thin-film a-Si/mc-Si tandem solar cells with random textured interfaces using FEM}, booktitle = {Renewable Energy and the Environment Optics and Photonics Congress}, publisher = {Optical Society of America}, doi = {10.1364/E2.2012.JM5A.15}, pages = {JM5A.15}, year = {2012}, language = {en} } @article{HammerschmidtLockauBurgeretal.2013, author = {Hammerschmidt, Martin and Lockau, Daniel and Burger, Sven and Schmidt, Frank and Schwanke, Christoph and Kirner, Simon and Calnan, Sonya and Stannowski, Bernd and Rech, Bernd}, title = {FEM-based optical modeling of silicon thin-film tandem solar cells with randomly textured interfaces in 3D}, volume = {8620}, journal = {Proc. SPIE}, doi = {10.1117/12.2001789}, pages = {86201H}, year = {2013}, language = {en} } @article{BeckerLockauSontheimeretal.2012, author = {Becker, Christiane and Lockau, Daniel and Sontheimer, Tobias and Schubert-Bischoff, Peter and Rudigier-Voigt, Eveline and Bockmeyer, Matthias and Schmidt, Frank and Rech, Bernd}, title = {Large-area 2D periodic crystalline silicon nanodome arrays on nanoimprinted glass exhibiting photonic band structure effects}, volume = {23}, journal = {Nanotechnology}, number = {13}, doi = {10.1088/0957-4484/23/13/135302}, pages = {135302}, year = {2012}, language = {en} } @article{SontheimerRudigierVoigtBockmeyeretal.2012, author = {Sontheimer, Tobias and Rudigier-Voigt, Eveline and Bockmeyer, Matthias and Lockau, Daniel and Klimm, Carola and Becker, Christiane and Rech, Bernd}, title = {Light harvesting architectures for electron beam evaporated solid phase crystallized Si thin film solar cells}, volume = {358}, journal = {Journal of Non-Crystalline Solids}, number = {17}, doi = {10.1016/j.jnoncrysol.2011.10.025}, pages = {2303 -- 2307}, year = {2012}, language = {en} } @article{LockauSontheimerBeckeretal.2013, author = {Lockau, Daniel and Sontheimer, Tobias and Becker, Christiane and Rudigier-Voigt, Eveline and Schmidt, Frank and Rech, Bernd}, title = {Nanophotonic light trapping in 3-dimensional thin-film silicon architectures}, volume = {21}, journal = {Opt. Express}, doi = {10.1364/OE.21.000A42}, pages = {A42}, year = {2013}, language = {en} } @article{LockauSontheimerPreideletal.2013, author = {Lockau, Daniel and Sontheimer, Tobias and Preidel, Veit and Becker, Christiane and Ruske, Florian and Schmidt, Frank and Rech, Bernd}, title = {Optical properties and Limits of a Large-Area Periodic Nanophotonic Light Trapping Design for Polycrystalline Silicon Thin Film Solar Cells}, volume = {1493}, journal = {MRS Proceedings}, doi = {10.1557/opl.2013.28}, pages = {59 -- 64}, year = {2013}, language = {en} } @article{PreidelLockauSontheimeretal.2013, author = {Preidel, Veit and Lockau, Daniel and Sontheimer, Tobias and Back, Franziska and Rudigier-Voigt, Eveline and Rech, Bernd and Becker, Christiane}, title = {Analysis of absorption enhancement in tailor-made periodic polycrystalline silicon microarrays}, volume = {7}, journal = {physica status solidi (RRL)-Rapid Research Letters}, number = {12}, publisher = {WILEY-VCH Verlag}, doi = {10.1002/pssr.201308098}, pages = {1045 -- 1049}, year = {2013}, language = {en} } @article{SontheimerPreidelLockauetal.2013, author = {Sontheimer, Tobias and Preidel, Veit and Lockau, Daniel and Back, Franziska and Rudigier-Voigt, Eveline and L{\"o}chel, Bernd and Erko, Alexei and Schmidt, Frank and Schnegg, Alexander and Lips, Klaus and Becker, Christiane and Rech, Bernd}, title = {Correlation between structural and opto-electronic characteristics of crystalline Si microhole arrays for photonic light management}, volume = {114}, journal = {Journal of Applied Physics}, number = {17}, publisher = {AIP Publishing}, doi = {10.1063/1.4829008}, pages = {173513}, year = {2013}, language = {en} } @article{LockauSontheimerPreideletal.2014, author = {Lockau, Daniel and Sontheimer, Tobias and Preidel, Veit and Ruske, Florian and Hammerschmidt, Martin and Becker, Christiane and Schmidt, Frank and Rech, Bernd}, title = {Advanced microhole arrays for light trapping in thin film silicon solar cells}, volume = {125}, journal = {Solar Energy Materials and Solar Cells}, doi = {10.1016/j.solmat.2013.11.024}, pages = {298 -- 304}, year = {2014}, language = {en} } @article{KirnerHammerschmidtSchwankeetal.2014, author = {Kirner, Simon and Hammerschmidt, Martin and Schwanke, Christoph and Lockau, Daniel and Calnan, Sonya and Frijnts, Tim and Neubert, Sebastian and Sch{\"o}pke, Andreas and Schmidt, Frank and Zollondz, Jens-Hendrik and Heidelberg, Andreas and Stannowski, Bernd and Rech, Bernd and Schlatmann, Rutger}, title = {Implications of TCO Topography on Intermediate Reflector Design for a-Si/μc-Si Tandem Solar Cells — Experiments and Rigorous Optical Simulations}, volume = {4}, journal = {IEEE Journal of Photovoltaics}, number = {1}, doi = {10.1109/JPHOTOV.2013.2279204}, pages = {10 -- 15}, year = {2014}, language = {en} } @inproceedings{HammerschmidtLockauZschiedrichetal.2014, author = {Hammerschmidt, Martin and Lockau, Daniel and Zschiedrich, Lin and Schmidt, Frank}, title = {Optical modelling of incoherent substrate light-trapping in silicon thin film multi-junction solar cells with finite elements and domain decomposition}, volume = {8980}, booktitle = {Proc. SPIE: Physics and Simulation of Optoelectronic Devices XXII}, publisher = {SPIE}, doi = {10.1117/12.2036346}, pages = {898007}, year = {2014}, language = {en} } @phdthesis{Lockau2013, author = {Lockau, Daniel}, title = {Optical modeling of thin film silicon solar cells with random and periodic light management textures}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:83-opus-38759}, year = {2013}, language = {en} } @inproceedings{LockauHammerschmidtHaschkeetal.2014, author = {Lockau, Daniel and Hammerschmidt, Martin and Haschke, Jan and Blome, Mark and Ruske, Florian and Schmidt, Frank and Rech, Bernd}, title = {A comparison of scattering and non-scattering anti-reflection designs for back contacted polycrystalline thin film silicon solar cells in superstrate configuration}, volume = {9140}, booktitle = {Proc. SPIE}, doi = {10.1117/12.2052362}, pages = {914006}, year = {2014}, language = {en} } @misc{HammerschmidtLockauZschiedrichetal.2014, author = {Hammerschmidt, Martin and Lockau, Daniel and Zschiedrich, Lin and Schmidt, Frank}, title = {Optical modelling of incoherent substrate light-trapping in silicon thin film multi-junction solar cells with finite elements and domain decomposition}, issn = {1438-0064}, doi = {10.1117/12.2036346}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-50410}, year = {2014}, abstract = {In many experimentally realized applications, e.g. photonic crystals, solar cells and light-emitting diodes, nano-photonic systems are coupled to a thick substrate layer, which in certain cases has to be included as a part of the optical system. The finite element method (FEM) yields rigorous, high accuracy solutions of full 3D vectorial Maxwell's equations [1] and allows for great flexibility and accuracy in the geometrical modelling. Time-harmonic FEM solvers have been combined with Fourier methods in domain decomposition algorithms to compute coherent solutions of these coupled system. [2,3] The basic idea of a domain decomposition approach lies in a decomposition of the domain into smaller subdomains, separate calculations of the solutions and coupling of these solutions on adjacent subdomains. In experiments light sources are often not perfectly monochromatic and hence a comparision to simulation results might only be justified if the simulation results, which include interference patterns in the substrate, are spectrally averaged. In this contribution we present a scattering matrix domain decomposition algorithm for Maxwell's equations based on FEM. We study its convergence and advantages in the context of optical simulations of silicon thin film multi-junction solar cells. This allows for substrate light-trapping to be included in optical simulations and leads to a more realistic estimation of light path enhancement factors in thin-film devices near the band edge.}, language = {en} } @misc{LockauHammerschmidtBlomeetal.2014, author = {Lockau, Daniel and Hammerschmidt, Martin and Blome, Mark and Schmidt, Frank}, title = {Optics of thin film solar cells}, volume = {1}, journal = {MATHEON-Mathematics for Key Technologies}, editor = {Deuflhard, Peter and et al.,}, publisher = {European Mathematical Society}, doi = {10.4171/137}, pages = {278 -- 279}, year = {2014}, language = {en} }