Che, Chi-Ming and Kwok, Chi-Chung and Lai, Siu-Wai and Rausch, Andreas F. and Finkenzeller, Walter J. and Zhu, Nianyong and Yersin, Hartmut (2010) Photophysical Properties and OLED Applications of Phosphorescent Platinum(II) Schiff Base Complexes. CHEMISTRY-A EUROPEAN JOURNAL, 16 (1). pp. 233-247. ISSN 0947-6539, 1521-3765
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The syntheses, crystal structures, and detailed investigations of the photophysical properties of phosphorescent platinum(II) Schiff base complexes are presented. All of these complexes exhibit intense absorption bands with lambda(max) in the range 417-546 nm, which are assigned to states of metal-to-ligand charge-transfer ((MLCT)-M-1) (1)[Pt(5d)->pi* (Schiff base)] character mixed with (1)[lone pair(phenoxide)->pi*(imine)] charge-transfer character. The platinum(II) Schiff base complexes are thermally stable, with decomposition temperatures up to 495 degrees C, and show emission lambda(max) at 541-649 nm in acetonitrile, with emission quantum yields up to 0.27. Measurements of the emission decay times in the temperature range from 130 to 1.5 K give total zero-field splitting parameters of the emitting triplet state of 14-28 cm(-1). High-performance yellow to red organic light-emitting devices (OLEDs) using these platinum(II) Schiff base complexes have been fabricated with the best efficiency up to 31 cd A(-1) and a device lifetime up to 77000 h at 500 cd m(-2).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DETECTED MAGNETIC-RESONANCE; EXCITED-STATE PROPERTIES; LIGHT-EMITTING MATERIALS; LYING ELECTRONIC STATES; TIME-RESOLVED SPECTRA; TRIPLET-STATE; HIGH-EFFICIENCY; ELECTROPHOSPHORESCENT DEVICES; TEMPERATURE-DEPENDENCE; CHARGE-TRANSFER; organic light-emitting diodes; phosphorescence; platinum; Schiff bases; triplet state |
| 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: | 12 Aug 2020 09:48 |
| Last Modified: | 12 Aug 2020 09:48 |
| URI: | https://pred.uni-regensburg.de/id/eprint/25391 |
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