Hole burning and single-molecule spectroscopy of terrylene in incommensurate biphenyl

Techniques of spectral hole burning and single-molecule spectroscopy have been used to study thin films of polycrystalline terrylene-doped biphenyl at temperatures between 1.7 and 2.2 K. A very wide range of probabilities of photoinduced spectral transitions of terrylene molecules are indicated by t...

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Bibliographic Details
Published in:Journal of luminescence 2004-05, Vol.107 (1), p.57-61
Main Authors: Palm, V, Pärs, M, Kikas, J
Format: Article
Language:English
Subjects:
Biphenyl
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Incommensurate structures
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Physics
Single-molecule spectroscopy
Spectral hole burning
Terrylene
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Summary:Techniques of spectral hole burning and single-molecule spectroscopy have been used to study thin films of polycrystalline terrylene-doped biphenyl at temperatures between 1.7 and 2.2 K. A very wide range of probabilities of photoinduced spectral transitions of terrylene molecules are indicated by the strong non-exponentiality of non-photochemical hole burning processes and observation of some extremely stable single-molecule lines. Broad distribution of single-molecule linewidths as well as obvious disagreement between their average value and the corresponding holewidth also demonstrate a large variety of spectral behaviour of terrylene impurity molecules. We attribute these effects to spatial variations of local environment of terrylene molecules in an incommensurate matrix of biphenyl.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2003.12.023