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@PHDTHESIS{Staub:885607,
      author       = {Staub, Florian},
      title        = {{T}ime-{R}esolved {P}hotoluminescence on {P}erovskite
                      {A}bsorber {M}aterials for {P}hotovoltaic {A}pplications},
      volume       = {513},
      school       = {Universität Duisburg},
      type         = {Dissertation},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2020-03959},
      isbn         = {978-3-95806-503-1},
      series       = {Schriften des Forschungszentrums Jülich. Reihe Energie
                      $\&$ Umwelt / Energy $\&$ Environment},
      pages        = {viii, 198 S.},
      year         = {2020},
      note         = {Universität Duisburg, Diss., 2020},
      abstract     = {Time-resolved photoluminescence has become a commonly used
                      tool to mainly determine charge-carrier lifetimes in metal
                      halide perovskites. In this thesis, I investigate
                      photoluminescence transients regarding radiative and
                      non-radiative charge-carrier recombination as well as
                      charge-carrier separation by diffusion. Additionally, I
                      focus on the so-called photon recycling effect. Photon
                      recycling refers to the self-absorption of photons, which
                      have been generated by radiative recombination of excited
                      states, within the absorber material itself. As photon
                      recycling is directly linked with the radiative
                      recombination process, the presence of photon recycling is
                      actually masked and not obvious in photoluminescence
                      transients. Here, I reveal the presence of photon recycling
                      in thin-film perovskites by reporting that the obtained
                      apparent radiative recombination rate can be manipulated by
                      modifying only the optical design of the sample stack; i. e.
                      tuning the probability of photonreabsorption in the absorber
                      layer by altering the light management in the stacks.
                      Furthermore, perovskite single crystals have been
                      investigated by time-resolved photoluminescence to study the
                      impact of reabsorption in more detail. I show that photon
                      recycling supports the preservation of charge carriers but
                      does not enable efficient charge-carrier transportation over
                      long distances. Spectral shifts observed in the transient
                      measurements are the result of altering reabsorption
                      characteristics as the recombination zone expands over time
                      into the bulk mainly as a consequence of charge-carrier
                      diffusion. Understanding photon recycling and recombination
                      processes is important for photovoltaic devices as these
                      mechanisms affect the open-circuit voltage. Based only on
                      the findings from time-resolved photoluminescence, I
                      demonstrate how to predict the maximum attainable
                      open-circuit voltage, which the investigated perovskite
                      absorber layer embedded in a solar cell stack could ideally
                      provide. This approach helps to estimate the photovoltaic
                      potential of any absorber layer based on its material
                      quality without the need of fabricating an entire solar cell
                      first.},
      cin          = {IEK-5},
      cid          = {I:(DE-Juel1)IEK-5-20101013},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/885607},
}