Shafikov, Marsel Z. and Suleymanova, Alfiya F. and Schinabeck, Alexander and Yersin, Hartmut (2018) Dinuclear Ag(I) Complex Designed for Highly Efficient Thermally Activated Delayed Fluorescence. JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 9 (4). pp. 702-709. ISSN 1948-7185,
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The dinuclear Ag(I) complex has been designed to show thermally activated delayed fluorescence (TADF) of high efficiency. Strongly electron-donating terminal ligands are introduced to destabilize the d orbitals of the Ag+ ions. Consequently, the orbitals distinctly contribute to the HOMO, whereas the LUMO is localized on the bridging ligand. This ensures charge transfer character of the lowest excited singlet S-1 and triplet T-1 states. Accordingly, a small energy gap Delta E(S-1-T-1) is obtained, being essential for TADF behavior. Photophysical investigations show that at ambient temperature the complex exhibits TADF reaching a quantum yield of Phi(PL) = 70% with the decay time of only tau = 1.9 mu s, manifesting one of the fastest TADF decays observed so far. Such an outstanding TADF efficiency is based on a small value of Delta E(S-1-T-1) = 480 cm(-1) combined with a large transition rate of k(S-1 -> S-0) = 2.2 X 10(7) s(-1).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LIGHT-EMITTING-DIODES; COPPER(I) HALIDE-COMPLEXES; CUPROUS COMPLEXES; CU(I) COMPLEXES; PHOTOPHYSICAL PROPERTIES; SILVER(I) COMPLEXES; CU-I; STATE STRUCTURE; BASIS-SETS; BLUE; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry III - Physical Chemistry (Molecular Spectroscopy and Photochemistry) > Prof. Dr. Hartmut Yersin |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 19 Mar 2020 12:24 |
| Last Modified: | 19 Mar 2020 12:24 |
| URI: | https://pred.uni-regensburg.de/id/eprint/15039 |
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