Holzer, W. and Penzkofer, Alfons and Tsuboi, T. (2005) Absorption and emission spectroscopic characterization of Ir(ppy)(3). CHEMICAL PHYSICS, 308 (1-2). pp. 93-102. ISSN 0301-0104, 1873-4421
Full text not available from this repository. (Request a copy)Abstract
The absorption and emission spectroscopic behaviour of cyclometalated fac-tris(2-phenylpyridine) iridium(III) [Ir(ppy)(3)] is studied at room temperature. Liquid solutions, doped films, and neat films are investigated. The absorption cross-section spectra including singlet triplet absorption, the triplet-singlet stimulated emission cross-section spectra, the phosphorescence quantum distributions, the phosphorescence quantum yields and the phosphorescence signal decays are determined. In neat films fluorescence self-quenching occurs, in diluted solid solution (polystyrene and dicarbazole-biphenyl films) as well as deaerated liquid solution (toluene) high phosphorescence quantum yields are obtained, and in air-saturated liquid solutions (chloroform, toluene, tetrahydrofuran) the phosphorescence efficiency is reduced by triplet oxygen quenching. At intense short-pulse laser excitation the phosphorescence lifetime is shortened by triplet-triplet annihilation. No amplification of spontaneous emission in the phosphorescence spectral region was observed indicating higher excited-state absorption than stimulated emission. (C) 2004 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LIGHT-EMITTING DEVICES; CYCLOMETALATED IRIDIUM COMPLEXES; OPTICAL-CONSTANTS MEASUREMENT; ORTHO-METALATED COMPLEXES; FORSTER ENERGY-TRANSFER; SOLID-STATE LASERS; CONJUGATED POLYMERS; EXCITED-STATE; THIN-FILMS; ORGANIC ELECTROPHOSPHORESCENCE; lr(ppy)(3); organometallic complex; MLCT-complex; doped film; neat film; phosphorescence quantum yield; phosphorescence lifetime; singlet-triplet absorption; stimulated emission cross-section; triplet triplet annihilation; amplified spontaneous emission |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Alfons Penzkofer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Jun 2021 14:53 |
| Last Modified: | 01 Jun 2021 14:53 |
| URI: | https://pred.uni-regensburg.de/id/eprint/36597 |
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