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@ARTICLE{Hoffmann:154809,
      author       = {Hoffmann, Andre and Paetzold, Ulrich W. and Zhang, Chao and
                      Merdzhanova, Tsvetelina and Lambertz, Andreas and Ulbrich,
                      Carolin and Bittkau, Karsten and Rau, Uwe},
      title        = {{A}dvancing tandem solar cells by spectrally selective
                      multilayer intermediate reflectors},
      journal      = {Optics express},
      volume       = {22},
      number       = {S5},
      issn         = {1094-4087},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2014-04077},
      pages        = {A1270},
      year         = {2014},
      abstract     = {Thin-film silicon tandem solar cells are composed of an
                      amorphous silicon top cell and a microcrystalline silicon
                      bottom cell, stacked and connected in series. In order to
                      match the photocurrents of the top cell and the bottom cell,
                      a proper photon management is required. Up to date,
                      single-layer intermediate reflectors of limited spectral
                      selectivity are applied to match the photocurrents of the
                      top and the bottom cell. In this paper, we design and
                      prototype multilayer intermediate reflectors based on
                      aluminum doped zinc oxide and doped microcrystalline silicon
                      oxide with a spectrally selective reflectance allowing for
                      improved current matching and an overall increase of the
                      charge carrier generation. The intermediate reflectors are
                      successfully integrated into state-of-the-art tandem solar
                      cells resulting in an increase of overall short-circuit
                      current density by 0.7 mA/cm² in comparison to a tandem
                      solar cell with the standard single-layer intermediate
                      reflector.},
      cin          = {IEK-5},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-5-20101013},
      pnm          = {111 - Thin Film Photovoltaics (POF2-111) / HITEC -
                      Helmholtz Interdisciplinary Doctoral Training in Energy and
                      Climate Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF2-111 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000340717300007},
      doi          = {10.1364/OE.22.0A1270},
      url          = {https://juser.fz-juelich.de/record/154809},
}