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Exciton localization in thin polymer films probed by selective fluorescence spectroscopy

Authors
Journal
Journal of Luminescence
0022-2313
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/s0022-2313(96)00211-6
Keywords
  • Section 12. Organic Materials

Abstract

Abstract We performed selective laser excitation of fluorescence of thin films of poly( p-phenylene) (PPP) at room and liquid helium temperatures. Monochromatic laser excitation becomes selective upon excitation below a threshold frequency of 22 400 cm −1 in the low-energy tail of the fluorescence excitation band, 2200 cm −1 below the maximum of the excitation spectrum. The experimental results are interpreted on the basis of model calculations.

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