Dynamics of Long-Lived Polarons in Poly({ital para}-phenylene)-Type Ladder Polymers

Journal Article · Sun Sep 01 00:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.2033· OSTI ID:383285

Graupner, W; Partee, J; Shinar, J; Leising, G; Scherf, U ^[1]

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1. Institut fuer Festkoerperphysik, Technische Universitaet Graz, A-8010 Graz (Austria)

The {ital X}-band spin-1/2 photoluminescence-detected magnetic resonance of poly({ital para}-phenylene)-type ladder polymer films and solutions are described. The photoluminescence-enhancing resonances are assigned to enhanced nonradiative recombination of long-lived polaron pairs, which are singlet exciton quenching centers. Their behavior is consistent with two distinct polaron lifetimes or a very broad distribution of lifetimes; in solutions they are {approx_equal}10 longer than in films. Distinct lifetimes are discussed in relation to longer-lived intrachain interconjugation segment and shorter-lived interchain pairs. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Ames National Laboratory
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 383285
• Journal Information: Physical Review Letters, Vol. 77, Issue 10; Other Information: PBD: Sep 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
POLYMERS
POLARONS
DYNAMICS
PHOTOLUMINESCENCE
MAGNETIC RESONANCE
RECOMBINATION
LIFETIME
EXCITONS
FILMS
SOLUTIONS