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Conferences > IQEC > 2000 > QThD > QThD57
  • 2000 International Quantum Electronics Conference
  • Technical Digest Series (Optica Publishing Group, 2000),
  • paper QThD57

Triplet formation via ultrafast intersystem crossing in thiophene oligomers detected by fs-time resolved transient spectra

Wolfgang Paa and Sabine Rentsch

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Abstract

Short thiophene oligomers (named nT, n: number of monomer units) especially bithiophene (2T) and terthiophene (3T) exhibit surprising high triplet quantum yields (up to 0.99 in 2T and 0.95 in 3T). These high triplet yields are responsible for their phototoxity and their usage as photosensitizers. To explain the fast process of triplet formation, we investigated these molecules by means of fs- time-resolved spectroscopy in dependence of excitation wavelength.

© 2000 IEEE

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