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Structural imperfections and singlet exciton traps in crystalline anthracene

✍ Scribed by John O. Williams; Brian P. Clarke; John M. Thomas; Michael J. Shaw

Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
350 KB
Volume
38
Category
Article
ISSN
0009-2614

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✦ Synopsis

Changes in spectral frequencies and intensities recorded at low temperatures (4 to 40 K), as well as measurements of prompt-fluorescence lifetimes, of annealed and deformed high-purity single crystals of anthracene reveal that traps l013ed nt ca. 300 cm-' and 1500 cm-' below the Sr level may be ascribed to displaced inolcculcs of anthracene in tl;e vicinity of -I dislocations. The broad background emission with a maximum at ca. 23 420 cm is found not to bc directly associated with such dislocations.

πŸ“œ SIMILAR VOLUMES

Singlet exciton-trapped carrier interact
Singlet exciton-trapped carrier interaction in anthracene
✍ M. Pope; J. Burgos; N. Wotherspoon πŸ“‚ Article πŸ“… 1971 πŸ› Elsevier Science 🌐 English βš– 403 KB

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.

Triplet excitons as probes for structura
Triplet excitons as probes for structural imperfections in crystalline anthracene
✍ D. Goode; Y. Lupien; W. Siebrand; D.F. Williams; J.M. Thomas; J.O. Williams πŸ“‚ Article πŸ“… 1974 πŸ› Elsevier Science 🌐 English βš– 401 KB

The phosphorescence and delayed fluorescence associated with triplet exciton trapping in crystalline anthracene have been used to demonstrate the physical nature of many of the traps and to determine their depth.