Vacuum-free lamination of low work function cathode for efficient solution-processed organic light-emitting diodes

Yu Fan Chang; Chun Yu Chen; Fang Tsai Luo; Yu Chiang Chao; Hsin Fei Meng; Hsiao Wen Zan; Hao Wu Lin; Sheng Fu Horng; Teng Chih Chao; Han Cheng Yeh; Mei Rurng Tseng

doi:10.1016/j.orgel.2011.11.008

Vacuum-free lamination of low work function cathode for efficient solution-processed organic light-emitting diodes

Yu Fan Chang, Chun Yu Chen, Fang Tsai Luo, Yu Chiang Chao, Hsin Fei Meng^*, Hsiao Wen Zan, Hao Wu Lin, Sheng Fu Horng, Teng Chih Chao, Han Cheng Yeh, Mei Rurng Tseng

^*Corresponding author for this work

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

18 Citations (Scopus)

Abstract

The low work function cathode of blade-coated organic light-emitting diode is transferred from a soft polydimethylsiloxane (PDMS) mold by lamination without vacuum. The cathode is a bilayer of polyethylene glycol (PEG) (<10 nm) and Al (100 nm). A sacrificial layer of polystyrene with low Mw 1500 and melting point of 120°C is inserted between the cathode and PDMS for the subsequent mold removal at 150°C by melting polystyrene. Current efficiency of 3 cd/A (1.1%) and luminance of 2500 cd/m² are achieved for green polyfluorene fluorescent emitter. 25 cd/A (8.2%) and 3200 cd/m² are achieved for green phosphorescent tris[2-(p-tolyl)pyridine]iridium(III) (Ir(mppy)₃) emitter in polymer blend host. The efficiency is about 70% of the devices with thermally evaporated cathode. The turn-on voltage is about 5 V higher.

Original language	English
Pages (from-to)	388-393
Number of pages	6
Journal	Organic Electronics
Volume	13
Issue number	3
DOIs	https://doi.org/10.1016/j.orgel.2011.11.008
Publication status	Published - 2012 Mar
Externally published	Yes

Keywords

Lamination
Low work function
Polyethylene glycol

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
General Chemistry
Condensed Matter Physics
Materials Chemistry
Electrical and Electronic Engineering

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10.1016/j.orgel.2011.11.008

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title = "Vacuum-free lamination of low work function cathode for efficient solution-processed organic light-emitting diodes",

abstract = "The low work function cathode of blade-coated organic light-emitting diode is transferred from a soft polydimethylsiloxane (PDMS) mold by lamination without vacuum. The cathode is a bilayer of polyethylene glycol (PEG) (<10 nm) and Al (100 nm). A sacrificial layer of polystyrene with low Mw 1500 and melting point of 120°C is inserted between the cathode and PDMS for the subsequent mold removal at 150°C by melting polystyrene. Current efficiency of 3 cd/A (1.1%) and luminance of 2500 cd/m2 are achieved for green polyfluorene fluorescent emitter. 25 cd/A (8.2%) and 3200 cd/m2 are achieved for green phosphorescent tris[2-(p-tolyl)pyridine]iridium(III) (Ir(mppy)3) emitter in polymer blend host. The efficiency is about 70% of the devices with thermally evaporated cathode. The turn-on voltage is about 5 V higher.",

keywords = "Lamination, Low work function, Polyethylene glycol",

author = "Chang, {Yu Fan} and Chen, {Chun Yu} and Luo, {Fang Tsai} and Chao, {Yu Chiang} and Meng, {Hsin Fei} and Zan, {Hsiao Wen} and Lin, {Hao Wu} and Horng, {Sheng Fu} and Chao, {Teng Chih} and Yeh, {Han Cheng} and Tseng, {Mei Rurng}",

note = "Funding Information: This work is supported by the Ministry of Economic Affairs of Taiwan under Contract No. 99-EC-17-A-07-S1-157.",

year = "2012",

month = mar,

doi = "10.1016/j.orgel.2011.11.008",

language = "English",

volume = "13",

pages = "388--393",

journal = "Organic Electronics",

issn = "1566-1199",

publisher = "Elsevier",

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T1 - Vacuum-free lamination of low work function cathode for efficient solution-processed organic light-emitting diodes

AU - Chang, Yu Fan

AU - Chen, Chun Yu

AU - Luo, Fang Tsai

AU - Chao, Yu Chiang

AU - Meng, Hsin Fei

AU - Zan, Hsiao Wen

AU - Lin, Hao Wu

AU - Horng, Sheng Fu

AU - Chao, Teng Chih

AU - Yeh, Han Cheng

AU - Tseng, Mei Rurng

N1 - Funding Information: This work is supported by the Ministry of Economic Affairs of Taiwan under Contract No. 99-EC-17-A-07-S1-157.

PY - 2012/3

Y1 - 2012/3

N2 - The low work function cathode of blade-coated organic light-emitting diode is transferred from a soft polydimethylsiloxane (PDMS) mold by lamination without vacuum. The cathode is a bilayer of polyethylene glycol (PEG) (<10 nm) and Al (100 nm). A sacrificial layer of polystyrene with low Mw 1500 and melting point of 120°C is inserted between the cathode and PDMS for the subsequent mold removal at 150°C by melting polystyrene. Current efficiency of 3 cd/A (1.1%) and luminance of 2500 cd/m2 are achieved for green polyfluorene fluorescent emitter. 25 cd/A (8.2%) and 3200 cd/m2 are achieved for green phosphorescent tris[2-(p-tolyl)pyridine]iridium(III) (Ir(mppy)3) emitter in polymer blend host. The efficiency is about 70% of the devices with thermally evaporated cathode. The turn-on voltage is about 5 V higher.

AB - The low work function cathode of blade-coated organic light-emitting diode is transferred from a soft polydimethylsiloxane (PDMS) mold by lamination without vacuum. The cathode is a bilayer of polyethylene glycol (PEG) (<10 nm) and Al (100 nm). A sacrificial layer of polystyrene with low Mw 1500 and melting point of 120°C is inserted between the cathode and PDMS for the subsequent mold removal at 150°C by melting polystyrene. Current efficiency of 3 cd/A (1.1%) and luminance of 2500 cd/m2 are achieved for green polyfluorene fluorescent emitter. 25 cd/A (8.2%) and 3200 cd/m2 are achieved for green phosphorescent tris[2-(p-tolyl)pyridine]iridium(III) (Ir(mppy)3) emitter in polymer blend host. The efficiency is about 70% of the devices with thermally evaporated cathode. The turn-on voltage is about 5 V higher.

KW - Lamination

KW - Low work function

KW - Polyethylene glycol

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JO - Organic Electronics

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ER -

Vacuum-free lamination of low work function cathode for efficient solution-processed organic light-emitting diodes

Abstract

Keywords

ASJC Scopus subject areas

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