Spectrally narrowed edge emission from organic light-emitting diodes

Yun Tian; Zhengqing Gan; Zhaoqun Zhou; David W. Lynch; Joseph Shinar; Ji Hun Kang; Q. Han Park

doi:10.1063/1.2778358

Spectrally narrowed edge emission from organic light-emitting diodes

Yun Tian, Zhengqing Gan, Zhaoqun Zhou, David W. Lynch, Joseph Shinar, Ji Hun Kang, Q. Han Park

Department of Physics

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

14 Citations (Scopus)

Abstract

A dramatic spectrally narrowed edge emission (SNEE) from small molecular organic light-emitting diodes at room temperature, with a full width at half maximum of 5-10 nm, is described. The results show that this emission is due to irregular waveguide modes that leak from the indium tin oxide anode to the glass substrate at a grazing angle. Measurements of variable stripe length devices exhibit an apparent weak optical gain, but there is no observable threshold bias associated with this SNEE. Hence this apparent "optical gain" is suspected to result from misalignment of the propagating leaky waveguide mode and the collecting optics.

Original language	English
Article number	143504
Journal	Applied Physics Letters
Volume	91
Issue number	14
DOIs	https://doi.org/10.1063/1.2778358
Publication status	Published - 2007

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2778358

Cite this

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title = "Spectrally narrowed edge emission from organic light-emitting diodes",

abstract = "A dramatic spectrally narrowed edge emission (SNEE) from small molecular organic light-emitting diodes at room temperature, with a full width at half maximum of 5-10 nm, is described. The results show that this emission is due to irregular waveguide modes that leak from the indium tin oxide anode to the glass substrate at a grazing angle. Measurements of variable stripe length devices exhibit an apparent weak optical gain, but there is no observable threshold bias associated with this SNEE. Hence this apparent {"}optical gain{"} is suspected to result from misalignment of the propagating leaky waveguide mode and the collecting optics.",

author = "Yun Tian and Zhengqing Gan and Zhaoqun Zhou and Lynch, {David W.} and Joseph Shinar and Kang, {Ji Hun} and Park, {Q. Han}",

note = "Funding Information: Ames Laboratory is operated by Iowa State University for the U.S. Department of Energy (USDOE) under Contract DE-AC 02-07CH11358. The work in Ames was supported by the Director for Energy Research, Office of Basic Energy Sciences, USDOE. The work in Korea was supported in part by q-Psi/KOSEF and the Seoul R&BD Program.",

year = "2007",

doi = "10.1063/1.2778358",

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T1 - Spectrally narrowed edge emission from organic light-emitting diodes

AU - Tian, Yun

AU - Gan, Zhengqing

AU - Zhou, Zhaoqun

AU - Lynch, David W.

AU - Shinar, Joseph

AU - Kang, Ji Hun

AU - Park, Q. Han

N1 - Funding Information: Ames Laboratory is operated by Iowa State University for the U.S. Department of Energy (USDOE) under Contract DE-AC 02-07CH11358. The work in Ames was supported by the Director for Energy Research, Office of Basic Energy Sciences, USDOE. The work in Korea was supported in part by q-Psi/KOSEF and the Seoul R&BD Program.

PY - 2007

Y1 - 2007

N2 - A dramatic spectrally narrowed edge emission (SNEE) from small molecular organic light-emitting diodes at room temperature, with a full width at half maximum of 5-10 nm, is described. The results show that this emission is due to irregular waveguide modes that leak from the indium tin oxide anode to the glass substrate at a grazing angle. Measurements of variable stripe length devices exhibit an apparent weak optical gain, but there is no observable threshold bias associated with this SNEE. Hence this apparent "optical gain" is suspected to result from misalignment of the propagating leaky waveguide mode and the collecting optics.

AB - A dramatic spectrally narrowed edge emission (SNEE) from small molecular organic light-emitting diodes at room temperature, with a full width at half maximum of 5-10 nm, is described. The results show that this emission is due to irregular waveguide modes that leak from the indium tin oxide anode to the glass substrate at a grazing angle. Measurements of variable stripe length devices exhibit an apparent weak optical gain, but there is no observable threshold bias associated with this SNEE. Hence this apparent "optical gain" is suspected to result from misalignment of the propagating leaky waveguide mode and the collecting optics.

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Spectrally narrowed edge emission from organic light-emitting diodes

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