% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@PHDTHESIS{Hoffmann:809987,
      author       = {Hoffmann, André},
      title        = {{L}ight {M}anagement by {I}ntermediate {R}eflectors in
                      {S}ilicon-based {T}andem {S}olar {C}ells},
      volume       = {345},
      school       = {RWTH Aachen},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2016-02871},
      isbn         = {978-3-95806-186-6},
      series       = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {193 S.},
      year         = {2016},
      note         = {RWTH Aachen, Diss., 2016},
      abstract     = {Multijunction solar cells provide a route to further
                      increase the efficiency of solar cells. By stacking
                      different band-gap materials, thermalization losses can be
                      decreased. Maximizing the effciency of series-connected
                      multijunction solar cells gets complex as a variety of
                      different layers is involved. The application of nano-scale
                      textures which scatter and diffract the light in order to
                      increase the light path and absorption. An advanced light
                      management combining light trapping and spectral
                      distribution is necessary to gain maximal output. In this
                      work, light management in silicon-based multijunction solar
                      cells by intermediate reflectors (IR) is studied. As soon as
                      the thickness of absorber layers in multijunction devices is
                      physically limited, IRs increase the light path in the sub
                      cells and contribute to the matching of currents and power
                      of the sub cells in series-connected multijunction solar
                      cells. As each element added to a working device increases
                      its complexity, the understanding of their interplay and
                      underlying loss mechanisms is crucial to obtain an
                      improvement of the device. Thin-film silicon tandem solar
                      cells made of hydrogenated amorphous and microcrystalline
                      silicon (also called 'micromorph') are chosen as model
                      system for the analysis of the optics in silicon-based
                      multijunction solar cells, as they are a well established
                      industrially up-scalable technology and exhibit the
                      important characteristics of other multijunction cell
                      material systems: Thin-film layers, nano-structured
                      surfaces, as well as physical limitations of thicknesses and
                      a broad utilization of the solar spectrum. The combination
                      of thin-film layer stack and nano-structured surfaces
                      demands for a treatment of the solar cell as a nano-optical
                      device. Motivated by the results of experimental studies,
                      tandem solar cells are modeled by thin-film optics and
                      rigorous optical simulations. An agreement between
                      simulation to experimental results allows for an
                      investigation and optimization of these devices. [...]},
      cin          = {IEK-5},
      cid          = {I:(DE-Juel1)IEK-5-20101013},
      pnm          = {121 - Solar cells of the next generation (POF3-121)},
      pid          = {G:(DE-HGF)POF3-121},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/809987},
}