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  • Milne, Christopher J.European XFEL, D-22761 Schenefeld, Germany.;Paul Scherrer Inst, SwissFEL, CH-5232 Villigen, Switzerland. (author)

Disentangling the evolution of electrons and holes in photoexcited ZnO nanoparticles

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • American Institute of Physics (AIP),2023
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-516927
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-516927URI
  • https://doi.org/10.1063/4.0000204DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • The evolution of charge carriers in photoexcited room temperature ZnO nanoparticles in solution is investigated using ultrafast ultraviolet photoluminescence spectroscopy, ultrafast Zn K-edge absorption spectroscopy, and ab initio molecular dynamics (MD) simulations. The photoluminescence is excited at 4.66 eV, well above the band edge, and shows that electron cooling in the conduction band and exciton formation occur in <500 fs, in excellent agreement with theoretical predictions. The x-ray absorption measurements, obtained upon excitation close to the band edge at 3.49 eV, are sensitive to the migration and trapping of holes. They reveal that the 2 ps transient largely reproduces the previously reported transient obtained at 100 ps time delay in synchrotron studies. In addition, the x-ray absorption signal is found to rise in similar to 1.4 ps, which we attribute to the diffusion of holes through the lattice prior to their trapping at singly charged oxygen vacancies. Indeed, the MD simulations show that impulsive trapping of holes induces an ultrafast expansion of the cage of Zn atoms in <200 fs, followed by an oscillatory response at a frequency of similar to 100 cm-1, which corresponds to a phonon mode of the system involving the Zn sub-lattice.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Nagornova, NataliaEcole Polytech Fed Lausanne, Lausanne Ctr Ultrafast Sci LACUS, ISIC, FSB, CH-1015 Lausanne, Switzerland. (author)
  • Pope, ThomasNewcastle Univ, Sch Nat & Environm Sci, Chem, Newcastle Upon Tyne NE1 7RU, England. (author)
  • Chen, Hui-YuanEcole Polytech Fed Lausanne, Lausanne Ctr Ultrafast Sci LACUS, ISIC, FSB, CH-1015 Lausanne, Switzerland. (author)
  • Rossi, ThomasEcole Polytech Fed Lausanne, Lausanne Ctr Ultrafast Sci LACUS, ISIC, FSB, CH-1015 Lausanne, Switzerland. (author)
  • Szlachetko, JakubPaul Scherrer Inst, SwissFEL, CH-5232 Villigen, Switzerland.;Adam Mickiewicz Univ, Fac Phys, Uniwersytetu Poznanskiego 2, PL-61614 Poznan, Poland. (author)
  • Gawelda, WojciechEuropean XFEL, D-22761 Schenefeld, Germany.;Adam Mickiewicz Univ, Fac Phys, Uniwersytetu Poznanskiego 2, PL-61614 Poznan, Poland.;IMDEA Nanosci Inst, Calle Faraday 9,Campus Cantoblanco, Madrid 28049, Spain.;Univ Autonoma Madrid, Dept Quim, Campus Cantoblanco, Madrid 28047, Spain. (author)
  • Britz, AlexanderEuropean XFEL, D-22761 Schenefeld, Germany.;Hamburg Ctr Ultrafast Imaging, Luruper Chaussee 149, D-22761 Hamburg, Germany. (author)
  • van Driel, Tim B.Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark. (author)
  • Sala, LeonardoPaul Scherrer Inst, SwissFEL, CH-5232 Villigen, Switzerland. (author)
  • Ebner, SimonPaul Scherrer Inst, SwissFEL, CH-5232 Villigen, Switzerland. (author)
  • Katayama, TetsuoJapan Synchrotron Radiat Res Inst JASRI, Kouto 1-1-1, Sayo, Hyogo 6795198, Japan.;RIKEN, SPring Ctr 8, Kouto 1-1-1, Sayo, Hyogo 6795148, Japan. (author)
  • Southworth, Stephen H.Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. (author)
  • Doumy, GillesArgonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. (author)
  • March, Anne MarieArgonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. (author)
  • Lehmann, C. StefanArgonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.;Adv Res Ctr Nanolithog ARCNL, Sci Pk 106, NL-1098 XG Amsterdam, Netherlands. (author)
  • Mucke, MelanieUppsala universitet,Institutionen för fysik och astronomi(Swepub:uu)melmu186 (author)
  • Iablonskyi, DenysTohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai 9808577, Japan. (author)
  • Kumagai, YoshiakiTohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai 9808577, Japan. (author)
  • Knopp, GregorPaul Scherrer Inst, SwissFEL, CH-5232 Villigen, Switzerland. (author)
  • Motomura, KojiTohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai 9808577, Japan. (author)
  • Togashi, TadashiTech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark. (author)
  • Owada, ShigekiRIKEN, SPring Ctr 8, Kouto 1-1-1, Sayo, Hyogo 6795148, Japan. (author)
  • Yabashi, MakinaRIKEN, SPring Ctr 8, Kouto 1-1-1, Sayo, Hyogo 6795148, Japan. (author)
  • Nielsen, Martin M.Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark. (author)
  • Pajek, MarekAdam Mickiewicz Univ, Fac Phys, Uniwersytetu Poznanskiego 2, PL-61614 Poznan, Poland. (author)
  • Ueda, KiyoshiRIKEN, SPring Ctr 8, Kouto 1-1-1, Sayo, Hyogo 6795148, Japan.;Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai 9808577, Japan. (author)
  • Abela, RafaelPaul Scherrer Inst, SwissFEL, CH-5232 Villigen, Switzerland. (author)
  • Penfold, Thomas J.Newcastle Univ, Sch Nat & Environm Sci, Chem, Newcastle Upon Tyne NE1 7RU, England. (author)
  • Chergui, MajedEcole Polytech Fed Lausanne, Lausanne Ctr Ultrafast Sci LACUS, ISIC, FSB, CH-1015 Lausanne, Switzerland. (author)
  • European XFEL, D-22761 Schenefeld, Germany.;Paul Scherrer Inst, SwissFEL, CH-5232 Villigen, Switzerland.Ecole Polytech Fed Lausanne, Lausanne Ctr Ultrafast Sci LACUS, ISIC, FSB, CH-1015 Lausanne, Switzerland. (creator_code:org_t)

Related titles

  • In:Structural Dynamics: American Institute of Physics (AIP)10:62329-7778

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