Taking a snapshot of the triplet excited state of an OLED organometallic luminophore using X-rays
-
Published:2020-05-01
Issue:1
Volume:11
Page:
-
ISSN:2041-1723
-
Container-title:Nature Communications
-
language:en
-
Short-container-title:Nat Commun
Author:
Smolentsev GrigoryORCID, Milne Christopher J.ORCID, Guda AlexanderORCID, Haldrup KristofferORCID, Szlachetko JakubORCID, Azzaroli NicoloORCID, Cirelli Claudio, Knopp GregorORCID, Bohinc Rok, Menzi SamuelORCID, Pamfilidis Georgios, Gashi Dardan, Beck MartinORCID, Mozzanica Aldo, James Daniel, Bacellar Camila, Mancini Giulia F., Tereshchenko Andrei, Shapovalov Victor, Kwiatek Wojciech M.ORCID, Czapla-Masztafiak Joanna, Cannizzo AndreaORCID, Gazzetto MichelaORCID, Sander Mathias, Levantino MatteoORCID, Kabanova Victoria, Rychagova Elena, Ketkov SergeyORCID, Olaru MarianORCID, Beckmann JensORCID, Vogt MatthiasORCID
Abstract
AbstractOLED 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.
Funder
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung Verband der Chemischen Industrie
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry
Reference81 articles.
1. Borchardt, J. K. Developments in organic displays. Mater. Today 7, 42–46 (2004). 2. Forrest, S. R. The path to ubiquitous and low-cost organic electronic appliances on plastic. Nature 428, 911 (2004). 3. Xu, R.-P., Li, Y.-Q. & Tang, J.-X. Recent advances in flexible organic light-emitting diodes. J. Mater. Chem. C. 4, 9116–9142 (2016). 4. Xiao, L. et al. Recent progresses on materials for electrophosphorescent organic light-emitting devices. Adv. Mater. 23, 926–952 (2011). 5. Yersin, H., Rausch, A. F., Czerwieniec, R., Hofbeck, T. & Fischer, T. The triplet state of organo-transition metal compounds. Triplet harvesting and singlet harvesting for efficient OLEDs. Coord. Chem. Rev. 255, 2622–2652 (2011).
Cited by
23 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|