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@ARTICLE{Albrecht:173075,
      author       = {Albrecht, Steve and Grootoonk, Björn and Neubert,
                      Sebastian and Roland, Steffen and Wördenweber, Jan and
                      Meier, Matthias and Schlatmann, Rutger and Gordijn, Aad and
                      Neher, Dieter},
      title        = {{E}fficient hybrid inorganic/organic tandem solar cells
                      with tailored recombination contacts},
      journal      = {Solar energy materials $\&$ solar cells},
      volume       = {127},
      issn         = {0927-0248},
      address      = {Amsterdam},
      publisher    = {North Holland},
      reportid     = {FZJ-2014-06488},
      pages        = {157 - 162},
      year         = {2014},
      abstract     = {In this work, the authors present a $7.5\%$ efficient
                      hybrid tandem solar cell with the bottom cell made of
                      amorphous silicon and a Si-PCPDTBT:PC70BM bulk
                      heterojunction top cell. Loss-free recombination contacts
                      were realized by combing Al-doped ZnO with either the
                      conducting polymer composite PEDOT:PSS or with a bilayer of
                      ultrathin Al and MoO3. Optimization of these contacts
                      results in tandem cells with high fill factors of $70\%$ and
                      an open circuit voltage close to the sum of those of the
                      sub-cells. This is the best efficiency reported for this
                      type of hybrid tandem cell so far. Optical and electrical
                      device modeling suggests that the efficiency can be
                      increased to $~12\%$ on combining a donor polymer with
                      suitable absorption onset with PCBM. We also describe
                      proof-of-principle studies employing light trapping in
                      hybrid tandem solar cells, suggesting that this device
                      architecture has the potential to achieve efficiencies well
                      above $12\%.$},
      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:000338618000022},
      doi          = {10.1016/j.solmat.2014.04.020},
      url          = {https://juser.fz-juelich.de/record/173075},
}