Schinabeck, Alexander and Leitl, Markus J. and Yersin, Hartmut (2018) Dinuclear Cu(I) Complex with Combined Bright TADF and Phosphorescence. Zero-Field Splitting and Spin-Lattice Relaxation Effects of the Triplet State. JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 9 (11). pp. 2848-2856. ISSN 1948-7185,
Full text not available from this repository. (Request a copy)Abstract
The three-fold bridged dinuclear Cu(I) complex Cu-2(mu-I)(2)(1N-n-butyl-5-diphenyl-phosphino-1,2,4-triazole)(3), Cu2I2(P<^>N)(3), shows bright thermally activated delayed fluorescence (TADF) as well as phosphorescence at ambient temperature with a total quantum yield of 85% at an emission decay time of 7 mu s. The singlet (S1)-triplet (T-1) energy gap is as small as only 430 cm(-1) (53 meV). Spin-orbit coupling induces a short-lived phosphorescence with a decay time of 52 mu s (T = 77 K) and a distinct zero-field splitting (ZFS) of T-1 into substates by similar to 2.5 cm(-1) (0.3 meV). Below T approximate to 10 K, effects of spin-lattice relaxation (SLR) are observed and agree with the size of ZFS. According to the combined phosphorescence and TADF, the overall emission decay time is reduced by similar to 13% as compared to the TADF-only process. The compound may potentially be applied in solution-processed OLEDs, exploiting both the singlet and triplet harvesting mechanisms.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LIGHT-EMITTING-DIODES; ACTIVATED-DELAYED FLUORESCENCE; CYCLOMETALATED PLATINUM(II) COMPLEXES; 3-COORDINATE COPPER(I) COMPLEXES; RESOLUTION OPTICAL SPECTROSCOPY; HIGH-EFFICIENCY OLEDS; HIGHLY-EFFICIENT; PHOTOPHYSICAL PROPERTIES; ELECTROCHEMICAL-CELLS; EXCITED-STATE; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie 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: | 17 Feb 2020 09:59 |
| Last Modified: | 17 Feb 2020 09:59 |
| URI: | https://pred.uni-regensburg.de/id/eprint/14414 |
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