Tsuboi, Taiju and Bansal, A. K. and Penzkofer, Alfons (2009) Temperature dependence of fluorescence and phosphorescence of the triphenylamine dimer 3-methyl-TPD. OPTICAL MATERIALS, 31 (6). pp. 980-988. ISSN 0925-3467, 1873-1252
Full text not available from this repository. (Request a copy)Abstract
The triphenylamine dimer, N,N'-bis(3-methylphenyl)-N,N'-bis(phenyl)-benzidine (TPD) as neat film, and as guest in polystyrene (PS), 4.4'-N,N'-dicarbazole-biphenyl (CBP), and polycarbonate (PC) films is investigated by luminescence spectroscopy. The luminescence quantum distributions, E-L(lambda), are determined over a wide temperature range from 10 K to 291 K by photo-excitation in the singlet absorption region of TPD. The singlet-excited phosphorescence quantum distributions are extracted by fluorescence contribution subtraction. The absolute intrinsic luminescence quantum yields, fluorescence quantum yields. and singlet-excited phosphorescence quantum yields are calculated from the quantum distributions. Even at room temperature phosphorescence emission is obtained. The triplet-singlet radiative lifetimes are determined from extracted SO-T, absorption and emission spectra, and the phosphorescence lifetimes are estimated from the phosphorescence quantum yields and the radiative phosphorescence lifetimes. In TPD neat films fluorescence reduction by self-quenching is observed. CBP host to TPD guest excitation transfer is observed in the case of excitation into the CBP absorption region. (c) 2008 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | EMISSION SPECTROSCOPIC CHARACTERIZATION; ORGANIC ELECTROLUMINESCENT DEVICES; LIGHT-EMITTING DEVICES; LASING CHARACTERIZATION; ENERGY-TRANSFER; NEAT FILMS; THIN-FILMS; ABSORPTION; DYE; TPD; Triphenylamine dimer TPD; Neat thin films; Doped thin films; Luminescence behaviour; Fluorescence behaviour; Phosphorescence behaviour |
| 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: | 21 Sep 2020 04:54 |
| Last Modified: | 21 Sep 2020 04:54 |
| URI: | https://pred.uni-regensburg.de/id/eprint/29224 |
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