Poly(p‐phenylenevinylene) light‐emitting diodes: Enhanced electroluminescent efficiency through charge carrier confinement

A R  BROWN; D D C  BRADLEY; J H  BURROUGHES; R H  FRIEND; N C  GREENHAM; P L  BURN; A B  HOLMES; A  KRAFT

doi:10.1063/1.108094

Poly(p‐phenylenevinylene) light‐emitting diodes: Enhanced electroluminescent efficiency through charge carrier confinement

A R BROWN, D D C BRADLEY, J H BURROUGHES, R H FRIEND, N C GREENHAM, P L BURN, A B HOLMES, A KRAFT

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Abstract

We have fabricated light-emitting diodes with poly(p-phenylenevinylene) as the emissive layer, and with an electron-transporting layer formed from a solid state dispersion of 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole in poly(methyl methacrylate), placed between this and the negative electrode. These structures show typically a tenfold improvement in efficiency in the low-voltage regime and an eightfold improvement in the high-voltage regime over devices without the electron-transporting layer. Typical efficiencies are about 0.8% photons/electron. We consider that the role of the electron-transport layer is to confine holes to the emissive layer.

Original language	English
Pages (from-to)	2793-2795
Number of pages	3
Journal	Applied Physics Letters
Volume	61
Issue number	23
DOIs	https://doi.org/10.1063/1.108094
Publication status	Published - 7 Dec 1992

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title = "Poly(p‐phenylenevinylene) light‐emitting diodes: Enhanced electroluminescent efficiency through charge carrier confinement",

abstract = "We have fabricated light-emitting diodes with poly(p-phenylenevinylene) as the emissive layer, and with an electron-transporting layer formed from a solid state dispersion of 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole in poly(methyl methacrylate), placed between this and the negative electrode. These structures show typically a tenfold improvement in efficiency in the low-voltage regime and an eightfold improvement in the high-voltage regime over devices without the electron-transporting layer. Typical efficiencies are about 0.8% photons/electron. We consider that the role of the electron-transport layer is to confine holes to the emissive layer.",

author = "BROWN, {A R} and BRADLEY, {D D C} and BURROUGHES, {J H} and FRIEND, {R H} and GREENHAM, {N C} and BURN, {P L} and HOLMES, {A B} and A KRAFT",

year = "1992",

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doi = "10.1063/1.108094",

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TY - JOUR

T1 - Poly(p‐phenylenevinylene) light‐emitting diodes: Enhanced electroluminescent efficiency through charge carrier confinement

AU - BROWN, A R

AU - BRADLEY, D D C

AU - BURROUGHES, J H

AU - FRIEND, R H

AU - GREENHAM, N C

AU - BURN, P L

AU - HOLMES, A B

AU - KRAFT, A

PY - 1992/12/7

Y1 - 1992/12/7

N2 - We have fabricated light-emitting diodes with poly(p-phenylenevinylene) as the emissive layer, and with an electron-transporting layer formed from a solid state dispersion of 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole in poly(methyl methacrylate), placed between this and the negative electrode. These structures show typically a tenfold improvement in efficiency in the low-voltage regime and an eightfold improvement in the high-voltage regime over devices without the electron-transporting layer. Typical efficiencies are about 0.8% photons/electron. We consider that the role of the electron-transport layer is to confine holes to the emissive layer.

AB - We have fabricated light-emitting diodes with poly(p-phenylenevinylene) as the emissive layer, and with an electron-transporting layer formed from a solid state dispersion of 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole in poly(methyl methacrylate), placed between this and the negative electrode. These structures show typically a tenfold improvement in efficiency in the low-voltage regime and an eightfold improvement in the high-voltage regime over devices without the electron-transporting layer. Typical efficiencies are about 0.8% photons/electron. We consider that the role of the electron-transport layer is to confine holes to the emissive layer.

U2 - 10.1063/1.108094

DO - 10.1063/1.108094

M3 - Article

SN - 0003-6951

VL - 61

SP - 2793

EP - 2795

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 23

ER -

Poly(p‐phenylenevinylene) light‐emitting diodes: Enhanced electroluminescent efficiency through charge carrier confinement

Abstract

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