Soliton pair charge storage in doped polyene molecules: Evidence from photoelectron spectroscopy studies

M. Lögdlund*, P. Dannetun, S. Stafström, W. R. Salaneck, M. G. Ramsey, C. W. Spangler, C. Fredriksson, Jean-Luc Bredas

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

The -electronic structural changes in a polyene molecule containing seven double bonds, ,-diphenyltetradecaheptaene (DP7), have been studied upon gradually doping with sodium, using x-ray and ultraviolet photoelectron spectroscopies. The spectra are interpreted with the help of detailed quantum chemical calculations. Analysis of the evolution of the XPS and UPS spectra as a function of doping with sodium indicates that the extra charges are stored in the form of two charged solitons on the polyene part of the molecules, which results in two new energy levels in the originally forbidden energy gap.

Original languageEnglish (US)
Pages (from-to)970-973
Number of pages4
JournalPhysical Review Letters
Volume70
Issue number7
DOIs
StatePublished - Jan 1 1993

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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