Electroluminescence-, conductivity-, and photoconductivity-detected magnetic resonance study of poly(p-phenylenevinylene)-based light emitting diodes

L. S. Swanson; J. Shinar; A. R. Brown; D. D. C. Bradley; R. H. Friend; P. L. Burn; A. Kraft; A. B. Holmes

doi:10.1016/0379-6779(93)90940-X

Electroluminescence-, conductivity-, and photoconductivity-detected magnetic resonance study of poly(p-phenylenevinylene)-based light emitting diodes

L. S. Swanson^*
, J. Shinar
, A. R. Brown
, D. D. C. Bradley
, R. H. Friend
, P. L. Burn
, A. Kraft
, A. B. Holmes

^*Corresponding author for this work

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

The strong electroluminescence (EL)-detected magnetic resonance of poly(p-phenylenevinylene) (PPV)-based light emitting diodes is compared to the conductivity (σ)-, photoconductivity (σ_ph)- and photoluminescence (PL)-detected resonances. In contrast to the narrow PL-enhancing resonance assigned to polaron fusion into singlet excitons, strong EL- and σ-quenching resonances are attributed to the spin-dependent polaron-to-bipolaron decay. While the half-field PL-detected resonance reveals only one triplet exciton resonance, believed to result from triplet-triplet fusion into singlets, the half-field EL- and σ-detected resonances yield two distinct triplets. While both are σ-enhancing, one is EL-quenching. The nature of the two triplet states is discussed.

Original language	English
Pages (from-to)	241-248
Number of pages	8
Journal	Synthetic Metals
Volume	55
Issue number	1
DOIs	https://doi.org/10.1016/0379-6779(93)90940-X
Publication status	Published - 15 Mar 1993

Keywords

bipolarons
conductivity-detected magnetic resonance
electroluminescence
electroluminescence-detected magnetic resonance
photoconductivity-detected magnetic resonance
photoluminescence
polarons
poly(p-phenylenevinylene)
singlet excitons
triplet excitons

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/0379-6779(93)90940-X

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@article{c26855c7ddaa4495b9917d9c079f3aca,

title = "Electroluminescence-, conductivity-, and photoconductivity-detected magnetic resonance study of poly(p-phenylenevinylene)-based light emitting diodes",

abstract = "The strong electroluminescence (EL)-detected magnetic resonance of poly(p-phenylenevinylene) (PPV)-based light emitting diodes is compared to the conductivity (σ)-, photoconductivity (σph)- and photoluminescence (PL)-detected resonances. In contrast to the narrow PL-enhancing resonance assigned to polaron fusion into singlet excitons, strong EL- and σ-quenching resonances are attributed to the spin-dependent polaron-to-bipolaron decay. While the half-field PL-detected resonance reveals only one triplet exciton resonance, believed to result from triplet-triplet fusion into singlets, the half-field EL- and σ-detected resonances yield two distinct triplets. While both are σ-enhancing, one is EL-quenching. The nature of the two triplet states is discussed.",

keywords = "bipolarons, conductivity-detected magnetic resonance, electroluminescence, electroluminescence-detected magnetic resonance, photoconductivity-detected magnetic resonance, photoluminescence, polarons, poly(p-phenylenevinylene), singlet excitons, triplet excitons",

author = "Swanson, \{L. S.\} and J. Shinar and Brown, \{A. R.\} and Bradley, \{D. D. C.\} and Friend, \{R. H.\} and Burn, \{P. L.\} and A. Kraft and Holmes, \{A. B.\}",

year = "1993",

month = mar,

day = "15",

doi = "10.1016/0379-6779(93)90940-X",

language = "English",

volume = "55",

pages = "241--248",

journal = "Synthetic Metals",

issn = "0379-6779",

publisher = "Elsevier B.V.",

number = "1",

}

TY - JOUR

T1 - Electroluminescence-, conductivity-, and photoconductivity-detected magnetic resonance study of poly(p-phenylenevinylene)-based light emitting diodes

AU - Swanson, L. S.

AU - Shinar, J.

AU - Brown, A. R.

AU - Bradley, D. D. C.

AU - Friend, R. H.

AU - Burn, P. L.

AU - Kraft, A.

AU - Holmes, A. B.

PY - 1993/3/15

Y1 - 1993/3/15

N2 - The strong electroluminescence (EL)-detected magnetic resonance of poly(p-phenylenevinylene) (PPV)-based light emitting diodes is compared to the conductivity (σ)-, photoconductivity (σph)- and photoluminescence (PL)-detected resonances. In contrast to the narrow PL-enhancing resonance assigned to polaron fusion into singlet excitons, strong EL- and σ-quenching resonances are attributed to the spin-dependent polaron-to-bipolaron decay. While the half-field PL-detected resonance reveals only one triplet exciton resonance, believed to result from triplet-triplet fusion into singlets, the half-field EL- and σ-detected resonances yield two distinct triplets. While both are σ-enhancing, one is EL-quenching. The nature of the two triplet states is discussed.

AB - The strong electroluminescence (EL)-detected magnetic resonance of poly(p-phenylenevinylene) (PPV)-based light emitting diodes is compared to the conductivity (σ)-, photoconductivity (σph)- and photoluminescence (PL)-detected resonances. In contrast to the narrow PL-enhancing resonance assigned to polaron fusion into singlet excitons, strong EL- and σ-quenching resonances are attributed to the spin-dependent polaron-to-bipolaron decay. While the half-field PL-detected resonance reveals only one triplet exciton resonance, believed to result from triplet-triplet fusion into singlets, the half-field EL- and σ-detected resonances yield two distinct triplets. While both are σ-enhancing, one is EL-quenching. The nature of the two triplet states is discussed.

KW - bipolarons

KW - conductivity-detected magnetic resonance

KW - electroluminescence

KW - electroluminescence-detected magnetic resonance

KW - photoconductivity-detected magnetic resonance

KW - photoluminescence

KW - polarons

KW - poly(p-phenylenevinylene)

KW - singlet excitons

KW - triplet excitons

UR - https://www.scopus.com/pages/publications/0027554546

U2 - 10.1016/0379-6779(93)90940-X

DO - 10.1016/0379-6779(93)90940-X

M3 - Article

SN - 0379-6779

VL - 55

SP - 241

EP - 248

JO - Synthetic Metals

JF - Synthetic Metals

IS - 1

ER -

Electroluminescence-, conductivity-, and photoconductivity-detected magnetic resonance study of poly(p-phenylenevinylene)-based light emitting diodes

Abstract

Keywords

ASJC Scopus subject areas

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