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@ARTICLE{Smeets:811664,
      author       = {Smeets, Michael and Lentz, Florian and Richter, Alexei and
                      Augarten, Yael and Bittkau, Karsten and Ding, Kaining and
                      Carius, Reinhard and Rau, Uwe and Paetzold, Ulrich W.},
      title        = {{P}rototyping of nanophotonic grating back contacts for
                      light trapping in planar silicon solar cells},
      journal      = {Physica status solidi / A},
      volume       = {213},
      number       = {7},
      issn         = {1862-6300},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2016-04050},
      pages        = {1949 - 1954},
      year         = {2016},
      abstract     = {Nanophotonic gratings can be used for efficient light
                      trapping in crystalline silicon solar cells. A common
                      challenge is the high quality surface passivation, when
                      applying such gratings. In this article, we report on the
                      prototyping of the application of nanophotonic grating back
                      contacts to planar silicon heterojunction solar cells for
                      improved light trapping. These back contacts are processed
                      after the Si wafer passivation, omitting any direct
                      texturing of the absorber layer. Thereby, maintaining the
                      integrity of the planar passivation layer of high quality
                      and simultaneous light trapping is realized. The induced
                      light-trapping effect is further studied by
                      photoluminescence imaging, external quantum efficiency
                      measurements as well as absorptance measurements of solar
                      cells applying nanophotonic grating back contacts of
                      different grating periods. A clear correlation is found for
                      the three characterization methods which allows the optimal
                      period for efficient light trapping in the investigated
                      solar cells to be identified. For the optimized grating
                      period of the nanophotonic grating back contact an increased
                      short-circuit current density is obtained and the power
                      conversion efficiency is enhanced by $0.4\%,$ absolute.},
      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:000385222900045},
      doi          = {10.1002/pssa.201532965},
      url          = {https://juser.fz-juelich.de/record/811664},
}