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Photoluminescence and UV-VIS absorption study of poly (para-phenylene)-type ladder-polymers

Authors
Journal
Journal of Luminescence
0022-2313
Publisher
Elsevier
Publication Date
Volume
63
Issue
3
Identifiers
DOI: 10.1016/0022-2313(94)00058-k
Disciplines
  • Physics

Abstract

Abstract Soluble poly(para-phenylene) (PPP)-type ladder-polymers have been shown to be suitable as active layers in light emitting diodes (LEDs). In this work we discuss the absorption spectra in the ultraviolet (UV) and visible (VIS) range as well as photoluminescence spectra of such materials. The steepness of the band edge in the absorption spectra indicates that high intrachain order and well-defined conjugation length are characteristic for these ladder-type PPPs (LPPP). By investigating the absorption and photoluminescence of LPPP dissolved in toluene and of solid LPPP films we study the influence of molecular interaction (formation of excimers, luminescence quenching through the presence of neighbouring molecules within the distance of energy transfer) on the photoluminescence quantum yield.

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