High efficiency low operating voltage polymer light-emitting diodes with aluminum cathode

X. Y. Deng; W. M. Lau; K. Y. Wong; K. H. Low; H. F. Chow; Y. Cao

doi:10.1063/1.1739510

High efficiency low operating voltage polymer light-emitting diodes with aluminum cathode

X. Y. Deng, W. M. Lau, K. Y. Wong^*, K. H. Low, H. F. Chow, Y. Cao

^*Corresponding author for this work

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

98 Citations (Scopus)

Abstract

The high efficiency low operating voltage polymer light-emitting diodes (PLED) with aluminum cathode were studied. The fabrication of PLED was also demonstrated. It was demonstrated that high efficiency PLED that used the stable metal Al as the cathode can be achieved by blending the emissive polymer with a low concentration of poly(ethylene glycol) (PEG). An orange-color-emitting PLED with 10 wt% PEG blending achieved device efficiencies exceeding 2.6 cd/A for a wide range of bias voltage, which was more than two orders of magnitude higher than that of a similar PLED without the PEG blending. It was shown that the enhanced efficiency was a result of the reduction of electron injection barrier height at the cathode-polymer interface.

Original language	English
Pages (from-to)	3522-3524
Number of pages	3
Journal	Applied Physics Letters
Volume	84
Issue number	18
DOIs	https://doi.org/10.1063/1.1739510
Publication status	Published - 3 May 2004
Externally published	Yes

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title = "High efficiency low operating voltage polymer light-emitting diodes with aluminum cathode",

abstract = "The high efficiency low operating voltage polymer light-emitting diodes (PLED) with aluminum cathode were studied. The fabrication of PLED was also demonstrated. It was demonstrated that high efficiency PLED that used the stable metal Al as the cathode can be achieved by blending the emissive polymer with a low concentration of poly(ethylene glycol) (PEG). An orange-color-emitting PLED with 10 wt\% PEG blending achieved device efficiencies exceeding 2.6 cd/A for a wide range of bias voltage, which was more than two orders of magnitude higher than that of a similar PLED without the PEG blending. It was shown that the enhanced efficiency was a result of the reduction of electron injection barrier height at the cathode-polymer interface.",

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T1 - High efficiency low operating voltage polymer light-emitting diodes with aluminum cathode

AU - Deng, X. Y.

AU - Lau, W. M.

AU - Wong, K. Y.

AU - Low, K. H.

AU - Chow, H. F.

AU - Cao, Y.

PY - 2004/5/3

Y1 - 2004/5/3

N2 - The high efficiency low operating voltage polymer light-emitting diodes (PLED) with aluminum cathode were studied. The fabrication of PLED was also demonstrated. It was demonstrated that high efficiency PLED that used the stable metal Al as the cathode can be achieved by blending the emissive polymer with a low concentration of poly(ethylene glycol) (PEG). An orange-color-emitting PLED with 10 wt% PEG blending achieved device efficiencies exceeding 2.6 cd/A for a wide range of bias voltage, which was more than two orders of magnitude higher than that of a similar PLED without the PEG blending. It was shown that the enhanced efficiency was a result of the reduction of electron injection barrier height at the cathode-polymer interface.

AB - The high efficiency low operating voltage polymer light-emitting diodes (PLED) with aluminum cathode were studied. The fabrication of PLED was also demonstrated. It was demonstrated that high efficiency PLED that used the stable metal Al as the cathode can be achieved by blending the emissive polymer with a low concentration of poly(ethylene glycol) (PEG). An orange-color-emitting PLED with 10 wt% PEG blending achieved device efficiencies exceeding 2.6 cd/A for a wide range of bias voltage, which was more than two orders of magnitude higher than that of a similar PLED without the PEG blending. It was shown that the enhanced efficiency was a result of the reduction of electron injection barrier height at the cathode-polymer interface.

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SP - 3522

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 18

ER -

High efficiency low operating voltage polymer light-emitting diodes with aluminum cathode

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