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@PHDTHESIS{Zhang:830262,
      author       = {Zhang, Chao},
      title        = {{I}nterface and {T}opography {O}ptimizationfor
                      {T}hin-{F}ilm {S}ilicon {S}olar {C}ells with
                      {D}oped{M}icrocrystalline {S}ilicon {O}xide {L}ayers},
      volume       = {360},
      school       = {RWTH Aachen},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2017-03835},
      isbn         = {978-3-95806-209-2},
      series       = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {VII, 156 S.},
      year         = {2017},
      note         = {RWTH Aachen, Diss., 2016},
      abstract     = {Low cost and low material consumption are the most import
                      advantages of thin-film silicon solar cells. The possibility
                      to manufacture in large scale makes this technology an
                      alternative photovoltaic technology that is suitable for
                      mass production comparable to multi- and monocrystalline
                      silicon solar cells. Also, compared to other thin-film solar
                      cells that are based on CdTe or CIGS there is neither a
                      limitation in supply of rare elements like tellurium and
                      indium, nor toxic cadmium is used. However, conversion
                      efficiency remains in a rather low level. The improvement of
                      conversion efficiency due to application of optically
                      advanced materials as hydrogenated microcrystalline silicon
                      oxide and the efficient usage of solar cell textures are
                      topics of this work. Moreover, optical and electrical loss
                      mechanisms in thin-film silicon solar cells are discussed.
                      The application of superior materials combined with
                      optimized front textures can contribute to the development
                      of more efficient and economically competitive future
                      thin-film silicon solar cells. In this work n- and p-type
                      hydrogenated microcrystalline silicon oxide
                      ($\mu$c-SiO$_{x}$:H)films were developed and implemented at
                      different positions within a solar cell. This can be as a
                      transparent contact or window layer in hydrogenated
                      amorphous (a-Si:H) or microcrystalline silicon ($\mu$c-Si:H)
                      single junction solar cells; as intermediate reflector layer
                      in a-Si:H/$\mu$c-Si:H tandem solar cells or as part of a
                      more effective back reflector insingle and tandem solar
                      cells. Higher transparency, solar grade electrical
                      conductivity, low-ohmic contact to sputtered ZnO:Al and
                      tunable refractive index make n- and p-type
                      $\mu$c-SiO$_{x}$:H a versatile and advanced material
                      compared to commonly used doped layers. In this work n- and
                      p-type $\mu$c-SiO$_{x}$:H layers were fabricated with a
                      conductivity of up to 10$^{-2}$ S/cm and a Raman
                      crystallinity of ~60\%. Furthermore, a broad range of
                      optical properties (band gap E$_{04}$ from 2.0 eV to 2.7 eV
                      and refractive index n from 1.8 to 3.2) for n-type
                      $\mu$c-SiO$_{0}$x:H (E$_{04}$ from 2.1 eV to 2.8 eV and n
                      1.6 to 2.6) for p-type $\mu$c-SiO$_{x}$:H films are
                      presented. These properties can be tuned by adapting
                      deposition parameters e.g. the CO$_{2}$/SiH$_{4}$ deposition
                      gas ratio.[...]},
      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/830262},
}