High-performance polymer light-emitting diodes utilizing modified Al cathode

Tzung Fang Guo; Fuh Shun Yang; Zen Jay Tsai; Ten Chin Wen; Sung Nien Hsieh; Yaw Shyan Fu

doi:10.1063/1.1984101

High-performance polymer light-emitting diodes utilizing modified Al cathode

Tzung Fang Guo, Fuh Shun Yang, Zen Jay Tsai, Ten Chin Wen, Sung Nien Hsieh, Yaw Shyan Fu

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

67 Citations (Scopus)

Abstract

We report an increase of electroluminescence (EL) efficiency by two orders of magnitude for poly(2-methoxy-5- (2′ -ethylhexyloxy)-1,4-phenylene vinylene) (MEH-PPV) based polymer light-emitting diodes (PLED) while employing Al as the cathode with an ultrathin layer of poly(ethylene oxide) (PEO). EL efficiencies of MEH-PPV PLEDs biased at 10 mA were found to be 0.017 cdA at 31 cd m2, 1.50 cdA at 2515 cd m2, and 4.96 cdA at 8416 cd m2 for applying Al, PEOAl, and PEOLiFAl as the device cathodes, respectively. The significant improvement in the device performance is attributed to the promotion of minority carrier injection (electrons), where the threshold of the injection can be characterized through the deviation of Fowler-Nordhiem tunneling prediction.

Original language	English
Article number	013504
Journal	Applied Physics Letters
Volume	87
Issue number	1
DOIs	https://doi.org/10.1063/1.1984101
Publication status	Published - 2005 Jul 4

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.1984101

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@article{3c567f071d804202b432e84f29459d9a,

title = "High-performance polymer light-emitting diodes utilizing modified Al cathode",

abstract = "We report an increase of electroluminescence (EL) efficiency by two orders of magnitude for poly(2-methoxy-5- (2′ -ethylhexyloxy)-1,4-phenylene vinylene) (MEH-PPV) based polymer light-emitting diodes (PLED) while employing Al as the cathode with an ultrathin layer of poly(ethylene oxide) (PEO). EL efficiencies of MEH-PPV PLEDs biased at 10 mA were found to be 0.017 cdA at 31 cd m2, 1.50 cdA at 2515 cd m2, and 4.96 cdA at 8416 cd m2 for applying Al, PEOAl, and PEOLiFAl as the device cathodes, respectively. The significant improvement in the device performance is attributed to the promotion of minority carrier injection (electrons), where the threshold of the injection can be characterized through the deviation of Fowler-Nordhiem tunneling prediction.",

author = "Guo, {Tzung Fang} and Yang, {Fuh Shun} and Tsai, {Zen Jay} and Wen, {Ten Chin} and Hsieh, {Sung Nien} and Fu, {Yaw Shyan}",

note = "Funding Information: Financial support from the National Science Council of Taiwan (NSC93-2218-E006-017 and NSC93-2214-E006-002) and the Center for Micro-NanoTechnology of National Cheng Kung University (NCKU) (NSC93-212-M-006-006) are acknowledged. The technical discussion from Dr. Yung-Chiang Lan at NCKU is highly appreciated.",

year = "2005",

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day = "4",

doi = "10.1063/1.1984101",

language = "English",

volume = "87",

journal = "Applied Physics Letters",

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T1 - High-performance polymer light-emitting diodes utilizing modified Al cathode

AU - Guo, Tzung Fang

AU - Yang, Fuh Shun

AU - Tsai, Zen Jay

AU - Wen, Ten Chin

AU - Hsieh, Sung Nien

AU - Fu, Yaw Shyan

N1 - Funding Information: Financial support from the National Science Council of Taiwan (NSC93-2218-E006-017 and NSC93-2214-E006-002) and the Center for Micro-NanoTechnology of National Cheng Kung University (NCKU) (NSC93-212-M-006-006) are acknowledged. The technical discussion from Dr. Yung-Chiang Lan at NCKU is highly appreciated.

PY - 2005/7/4

Y1 - 2005/7/4

N2 - We report an increase of electroluminescence (EL) efficiency by two orders of magnitude for poly(2-methoxy-5- (2′ -ethylhexyloxy)-1,4-phenylene vinylene) (MEH-PPV) based polymer light-emitting diodes (PLED) while employing Al as the cathode with an ultrathin layer of poly(ethylene oxide) (PEO). EL efficiencies of MEH-PPV PLEDs biased at 10 mA were found to be 0.017 cdA at 31 cd m2, 1.50 cdA at 2515 cd m2, and 4.96 cdA at 8416 cd m2 for applying Al, PEOAl, and PEOLiFAl as the device cathodes, respectively. The significant improvement in the device performance is attributed to the promotion of minority carrier injection (electrons), where the threshold of the injection can be characterized through the deviation of Fowler-Nordhiem tunneling prediction.

AB - We report an increase of electroluminescence (EL) efficiency by two orders of magnitude for poly(2-methoxy-5- (2′ -ethylhexyloxy)-1,4-phenylene vinylene) (MEH-PPV) based polymer light-emitting diodes (PLED) while employing Al as the cathode with an ultrathin layer of poly(ethylene oxide) (PEO). EL efficiencies of MEH-PPV PLEDs biased at 10 mA were found to be 0.017 cdA at 31 cd m2, 1.50 cdA at 2515 cd m2, and 4.96 cdA at 8416 cd m2 for applying Al, PEOAl, and PEOLiFAl as the device cathodes, respectively. The significant improvement in the device performance is attributed to the promotion of minority carrier injection (electrons), where the threshold of the injection can be characterized through the deviation of Fowler-Nordhiem tunneling prediction.

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High-performance polymer light-emitting diodes utilizing modified Al cathode

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