Exciton spectroscopy of red polydiacetylene chains in single crystals

T Barisien, L Legrand, G Weiser, J Deschamps…

Index: Barisien; Legrand; Weiser; Deschamps; Balog; Boury; Dutremez; Schott Chemical Physics Letters, 2007 , vol. 444, # 4-6 p. 309 - 313

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Citation Number: 18

Abstract

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∼ 14Å) 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 ...