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@ARTICLE{Ammirati:1044674,
      author       = {Ammirati, Giuseppe and Turchini, Stefano and Toschi,
                      Francesco and O'Keeffe, Patrick and Paladini, Alessandra and
                      Mattioli, Giuseppe and Moras, Paolo and Sheverdyaeva, Polina
                      M. and Milotti, Valeria and Brabec, Christoph J. and Wagner,
                      Michael and McCulloch, Iain and Di Carlo, Aldo and Catone,
                      Daniele},
      title        = {{E}lectron‐{H}ole {S}eparation {D}ynamics and
                      {O}ptoelectronic {P}roperties of a {PCE}10:{FOIC} {B}lend},
      journal      = {Small},
      volume       = {21},
      number       = {34},
      issn         = {1613-6810},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2025-03323},
      pages        = {2505063},
      year         = {2025},
      abstract     = {Understanding charge separation dynamics in organic
                      semiconductor blends is crucial for optimizing the
                      performance of organic photovoltaic solar cells. In this
                      study, the optoelectronic properties and charge separation
                      dynamics of a PCE10:FOIC blend, by combining steady-state
                      and time-resolved spectroscopies with high-level DFT
                      calculations. Femtosecond transient absorption spectroscopy
                      revealed a significant reduction of the exciton-exciton
                      annihilation recombination rate in the acceptor when
                      incorporated into the blend, compared to its pristine form.
                      This reduction is attributed to a decrease in exciton
                      density within the acceptor, driven by an efficient
                      hole-separation process that is characterized by following
                      the temporal evolution of the transient signals associated
                      with the excited states of the donor when the acceptor is
                      selectively excited within the blend. The analysis of these
                      dynamics enabled the estimation of the hole separation time
                      constant from the acceptor to the donor, yielding a time
                      constant of (1.3 ± 0.3) ps. Additionally, this study
                      allowed the quantification of exciton diffusion and revealed
                      a charge separation efficiency of $≈60\%,$ providing
                      valuable insights for the design of next-generation organic
                      photovoltaic materials with enhanced charge separation and
                      improved device efficiency.},
      cin          = {IET-2},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IET-2-20140314},
      pnm          = {1212 - Materials and Interfaces (POF4-121)},
      pid          = {G:(DE-HGF)POF4-1212},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {40605351},
      UT           = {WOS:001521433000001},
      doi          = {10.1002/smll.202505063},
      url          = {https://juser.fz-juelich.de/record/1044674},
}