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Solid-state transitions in crystalline tetracene

✍ Scribed by R. Jankowiak; J. Kalinowski; M. Konys; J. Buchert

Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
469 KB
Volume
65
Category
Article
ISSN
0009-2614

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✦ Synopsis

Solid-state tmnsitions in crystalline tetmcene h%e been investigated b\ Raman spectroscopy and b> anisotropy of the effect of ZI magetic field on its prompt fluorescence. Discontinuous changes in the temperature dependence of Ramrtn lattice modes nnd new phonon lines occur nezu 182 zmd 144 K, signifying the occurrence OF two phase tnmsitions. The m&gnetic nnisotropy effect shows .I gmduai change with tempenture. suggesting the transition at 182 K is preceded by ZI continuous rotation of the intermoleculnr pIme_ * This uork hlls been p.utly supported by the Polish Aczxdem) of Sciences_

πŸ“œ SIMILAR VOLUMES

Bimolecular radiationless transitions in
Bimolecular radiationless transitions in crystalline tetracene
✍ C.E. Swenberg; W.T. Stacy πŸ“‚ Article πŸ“… 1968 πŸ› Elsevier Science 🌐 English βš– 190 KB

## Bimolecular decay of an excited singlet exciton into two triplet excitons is suggested to be an imporchannel in crystailinc tetracene and its corresponding rate is estimated to orocess is tentatively proposed to account for the observed reJ.ative fluorescence efficiencies of anthracene, tetrace

Quantum yield of photoenhanced currents
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✍ W. Arden; M. Kotani; L.M. Peter πŸ“‚ Article πŸ“… 1976 πŸ› Elsevier Science 🌐 English βš– 446 KB

A study of photoenhanced currents {PECf in crystatline tetracene has been made. Using the well+stabiished theoF of space-charge controlled currents in insulators, it is shown that the quantum yield for the release of trapped carriers by triplet esfitbns is less thzm unity.