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@ARTICLE{Feldmann:890102,
      author       = {Feldmann, Sascha and Macpherson, Stuart and Senanayak,
                      Satyaprasad P. and Abdi-Jalebi, Mojtaba and Rivett, Jasmine
                      P. H. and Nan, Guangjun and Tainter, Gregory D. and Doherty,
                      Tiarnan A. S. and Frohna, Kyle and Ringe, Emilie and Friend,
                      Richard H. and Sirringhaus, Henning and Saliba, Michael and
                      Beljonne, David and Stranks, Samuel D. and Deschler, Felix},
      title        = {{P}hotodoping through local charge carrier accumulation in
                      alloyed hybrid perovskites for highly efficient
                      luminescence},
      journal      = {Nature photonics},
      volume       = {14},
      number       = {2},
      issn         = {1749-4893},
      address      = {London [u.a.]},
      publisher    = {Nature Publ. Group},
      reportid     = {FZJ-2021-00691},
      pages        = {123-128},
      year         = {2020},
      abstract     = {Metal halide perovskites have emerged as exceptional
                      semiconductors for optoelectronic applications. Substitution
                      of the monovalent cations has advanced luminescence yields
                      and device efficiencies. Here, we control the cation
                      alloying to enhance optoelectronic performance through
                      alteration of the charge carrier dynamics in mixed-halide
                      perovskites. In contrast to single-halide perovskites, we
                      find high luminescence yields for photoexcited carrier
                      densities far below solar illumination conditions. Using
                      time-resolved spectroscopy we show that the charge carrier
                      recombination regime changes from second to first order
                      within the first tens of nanoseconds after excitation.
                      Supported by microscale mapping of the optical bandgap,
                      electrically gated transport measurements and
                      first-principles calculations, we demonstrate that spatially
                      varying energetic disorder in the electronic states causes
                      local charge accumulation, creating p- and n-type photodoped
                      regions, which unearths a strategy for efficient light
                      emission at low charge-injection in solar cells and
                      light-emitting diodes.},
      cin          = {IEK-5},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-5-20101013},
      pnm          = {121 - Solar cells of the next generation (POF3-121) /
                      Helmholtz Young Investigators Group
                      (HGF-YoungInvestigatorsGroup)},
      pid          = {G:(DE-HGF)POF3-121 / G:(DE-HGF)HGF-YoungInvestigatorsGroup},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000511124400013},
      doi          = {10.1038/s41566-019-0546-8},
      url          = {https://juser.fz-juelich.de/record/890102},
}