TY - JOUR
T1 - Taking a snapshot of the triplet excited state of an OLED organometallic luminophore using X-rays
AU - Smolentsev, Grigory
AU - Milne, Christopher J.
AU - Guda, Alexander
AU - Haldrup, Kristoffer
AU - Szlachetko, Jakub
AU - Azzaroli, Nicolo
AU - Cirelli, Claudio
AU - Knopp, Gregor
AU - Bohinc, Rok
AU - Menzi, Samuel
AU - Pamfilidis, Georgios
AU - Gashi, Dardan
AU - Beck, Martin
AU - Mozzanica, Aldo
AU - James, Daniel
AU - Bacellar, Camila
AU - Mancini, Giulia F.
AU - Tereshchenko, Andrei
AU - Shapovalov, Victor
AU - Kwiatek, Wojciech M.
AU - Czapla-Masztafiak, Joanna
AU - Cannizzo, Andrea
AU - Gazzetto, Michela
AU - Sander, Mathias
AU - Levantino, Matteo
AU - Kabanova, Victoria
AU - Rychagova, Elena
AU - Ketkov, Sergey
AU - Olaru, Marian
AU - Beckmann, Jens
AU - Vogt, Matthias
PY - 2020
Y1 - 2020
N2 - OLED technology beyond small or expensive devices requires light-emitters, luminophores, based on earth-abundant elements. Understanding and experimental verification of charge transfer in luminophores are needed for this development. An organometallic multicore Cu complex comprising Cu–C and Cu–P bonds represents an underexplored type of luminophore. To investigate the charge transfer and structural rearrangements in this material, we apply complementary pump-probe X-ray techniques: absorption, emission, and scattering including pump-probe measurements at the X-ray free-electron laser SwissFEL. We find that the excitation leads to charge movement from C- and P- coordinated Cu sites and from the phosphorus atoms to phenyl rings; the Cu core slightly rearranges with 0.05 Å increase of the shortest Cu–Cu distance. The use of a Cu cluster bonded to the ligands through C and P atoms is an efficient way to keep structural rigidity of luminophores. Obtained data can be used to verify computational methods for the development of luminophores.
AB - OLED technology beyond small or expensive devices requires light-emitters, luminophores, based on earth-abundant elements. Understanding and experimental verification of charge transfer in luminophores are needed for this development. An organometallic multicore Cu complex comprising Cu–C and Cu–P bonds represents an underexplored type of luminophore. To investigate the charge transfer and structural rearrangements in this material, we apply complementary pump-probe X-ray techniques: absorption, emission, and scattering including pump-probe measurements at the X-ray free-electron laser SwissFEL. We find that the excitation leads to charge movement from C- and P- coordinated Cu sites and from the phosphorus atoms to phenyl rings; the Cu core slightly rearranges with 0.05 Å increase of the shortest Cu–Cu distance. The use of a Cu cluster bonded to the ligands through C and P atoms is an efficient way to keep structural rigidity of luminophores. Obtained data can be used to verify computational methods for the development of luminophores.
U2 - 10.1038/s41467-020-15998-z
DO - 10.1038/s41467-020-15998-z
M3 - Journal article
C2 - 32358505
SN - 2041-1723
VL - 11
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 2131
ER -