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@ARTICLE{Hoffmann:187704,
      author       = {Hoffmann, Andre and Bittkau, Karsten and Zhang, Chao and
                      Merdzhanova, Tsvetelina and Rau, Uwe},
      title        = {{C}oupling {I}ncident {L}ight to {G}uided {M}odes in
                      {T}hin-{F}ilm {T}andem {S}olar {C}ells {W}ith {I}ntermediate
                      {R}eflector},
      journal      = {IEEE journal of photovoltaics},
      volume       = {5},
      number       = {1},
      issn         = {2156-3381},
      address      = {New York, NY},
      publisher    = {IEEE},
      reportid     = {FZJ-2015-01315},
      pages        = {3 - 8},
      year         = {2015},
      abstract     = {We investigate the impact of intermediate reflectors on
                      textured thin-film tandem solar cells. The electric
                      near-field intensity distribution inside the layer stack is
                      simulated by rigorous scattering theory. From those results,
                      we extract the angular scattering intensity distribution in
                      the top and bottom solar cell. The improvement in top cell
                      quantum efficiency for various different intermediate
                      reflectors is correlated with the coupling efficiency to
                      leaky waveguide modes for a periodic triangular grating as a
                      model system. In a further step, we show that the same
                      approach can be applied to randomly textured substrates
                      where light couples to a broad distribution of waveguide
                      modes. The integrated scattering intensity above the
                      critical angle of total internal reflection of this system
                      is successfully correlated with the measured external
                      quantum efficiency of tandem solar cells with various IRs. A
                      local investigation of trapped light is presented to
                      identify good light-trapping structures.},
      cin          = {IEK-5},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-5-20101013},
      pnm          = {121 - Solar cells of the next generation (POF3-121) / HITEC
                      - Helmholtz Interdisciplinary Doctoral Training in Energy
                      and Climate Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-121 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000346732700001},
      doi          = {10.1109/JPHOTOV.2014.2359740},
      url          = {https://juser.fz-juelich.de/record/187704},
}