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Article Dans Une Revue Chemical Physics Letters Année : 2007

Exciton spectroscopy of red polydiacetylene chains in single crystals

Résumé

The absorption and emission properties of excitons are investigated in a pure “red” phase of luminescent polydiacetylene wires. The values of the binding energy (Eb = 0.556 eV) and Bohr radius (r ~ 14 Å) make the “red” exciton similar to the one of the extensively studied “blue” phase, so the conformational modifications which lead to a reordering of excited states and luminescent emission do not strongly affect the exciton structure. The opening of a thermally activated non radiative channel leads to an efficient quenching of the intense luminescence observed at low temperature.
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Dates et versions

hal-00186913 , version 1 (12-11-2007)

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Thierry Barisien, Laurent Legrand, Gerhardt Weiser, Jéromes Deschamps, Mirela Balog, et al.. Exciton spectroscopy of red polydiacetylene chains in single crystals. Chemical Physics Letters, 2007, 444 (4-6), pp.309-313. ⟨10.1016/j.cplett.2007.07.031⟩. ⟨hal-00186913⟩
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