Singlet exciton fission in anthracene at different temperatures
✍ Scribed by J. Fünfschilling; K. von Burg; I. Zschokke-Gränacher
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 239 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
We have measured the magnetic field dependence of the prompt fluorescente of anthracene crystals at temperatures down to 10 K. Fklow 50 K the field dependence of prompt and delayed fluorescente ísnot symmetrïc anymore. Thk shows. that the prompt and the delayed fluorescente originate from different regions within the crystal.
📜 SIMILAR VOLUMES
The singlet exciton-charge carrier annihilation rate constant KS has been measured CLS Xi x 10-5cm3 set-1 for hoies and electrons. The mngnitude of Ks is discussed with respect to the magnitude of rhc electron-hole recombination rate constant.
Singlet excitons in anthracene crystal are annihilated by trapped hoIes near an Au hole-injecting electrode. The efficiency of detrappiny is about 1%. The singlet exciton fluorescence can be modulated by means of a varying external eIectric field.
It has been found that fluorescence from an anthracene crystal can be modulated by an external magnetic field under strong excitation (2= 308 nm). Dependence on the magnetic field strength and its orientation with respect to the crystal axes have been measured. Magnetic field effects on the fluoresc