Extremely efficient flexible organic light-emitting diodes with modified graphene anode

Tae Hee Han; Youngbin Lee; Mi Ri Choi; Seong Hoon Woo; Sang Hoon Bae; Byung Hee Hong; Jong Hyun Ahn; Tae Woo Lee

doi:10.1038/nphoton.2011.318

Extremely efficient flexible organic light-emitting diodes with modified graphene anode

Tae Hee Han, Youngbin Lee, Mi Ri Choi, Seong Hoon Woo, Sang Hoon Bae, Byung Hee Hong, Jong Hyun Ahn, Tae Woo Lee

Department of Electrical and Electronic Engineering

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

1236 Citations (Scopus)

Abstract

Although graphene films have a strong potential to replace indium tin oxide anodes in organic light-emitting diodes (OLEDs), to date, the luminous efficiency of OLEDs with graphene anodes has been limited by a lack of efficient methods to improve the low work function and reduce the sheet resistance of graphene films to the levels required for electrodes^1-4. Here, we fabricate flexible OLEDs by modifying the graphene anode to have a high work function and low sheet resistance, and thus achieve extremely high luminous efficiencies (37.2 lm W^-1 in fluorescent OLEDs, 102.7 lm W ^-1 in phosphorescent OLEDs), which are significantly higher than those of optimized devices with an indium tin oxide anode (24.1 lm W ^-1 in fluorescent OLEDs, 85.6 lm W^-1 in phosphorescent OLEDs). We also fabricate flexible white OLED lighting devices using the graphene anode. These results demonstrate the great potential of graphene anodes for use in a wide variety of high-performance flexible organic optoelectronics.

Original language	English
Pages (from-to)	105-110
Number of pages	6
Journal	Nature Photonics
Volume	6
Issue number	2
DOIs	https://doi.org/10.1038/nphoton.2011.318
Publication status	Published - 2012 Feb

Bibliographical note

Funding Information:
This research was supported by the Basic Research Program and Global Frontier Research Center for Advanced Soft Electronics through the National Research Foundation of Korea (NRF), funded by the Ministry of Education, Science and Technology (nos. 2009-0067533, 2009-0075025, 2011-0006268 and 2009-0090177). This research was also supported by the Converging Research Center Program through the Ministry of Education, Science and Technology (no. 2010K001431).

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics

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10.1038/nphoton.2011.318

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title = "Extremely efficient flexible organic light-emitting diodes with modified graphene anode",

abstract = "Although graphene films have a strong potential to replace indium tin oxide anodes in organic light-emitting diodes (OLEDs), to date, the luminous efficiency of OLEDs with graphene anodes has been limited by a lack of efficient methods to improve the low work function and reduce the sheet resistance of graphene films to the levels required for electrodes1-4. Here, we fabricate flexible OLEDs by modifying the graphene anode to have a high work function and low sheet resistance, and thus achieve extremely high luminous efficiencies (37.2 lm W-1 in fluorescent OLEDs, 102.7 lm W -1 in phosphorescent OLEDs), which are significantly higher than those of optimized devices with an indium tin oxide anode (24.1 lm W -1 in fluorescent OLEDs, 85.6 lm W-1 in phosphorescent OLEDs). We also fabricate flexible white OLED lighting devices using the graphene anode. These results demonstrate the great potential of graphene anodes for use in a wide variety of high-performance flexible organic optoelectronics.",

author = "Han, {Tae Hee} and Youngbin Lee and Choi, {Mi Ri} and Woo, {Seong Hoon} and Bae, {Sang Hoon} and Hong, {Byung Hee} and Ahn, {Jong Hyun} and Lee, {Tae Woo}",

note = "Funding Information: This research was supported by the Basic Research Program and Global Frontier Research Center for Advanced Soft Electronics through the National Research Foundation of Korea (NRF), funded by the Ministry of Education, Science and Technology (nos. 2009-0067533, 2009-0075025, 2011-0006268 and 2009-0090177). This research was also supported by the Converging Research Center Program through the Ministry of Education, Science and Technology (no. 2010K001431).",

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AU - Hong, Byung Hee

AU - Ahn, Jong Hyun

AU - Lee, Tae Woo

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PY - 2012/2

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N2 - Although graphene films have a strong potential to replace indium tin oxide anodes in organic light-emitting diodes (OLEDs), to date, the luminous efficiency of OLEDs with graphene anodes has been limited by a lack of efficient methods to improve the low work function and reduce the sheet resistance of graphene films to the levels required for electrodes1-4. Here, we fabricate flexible OLEDs by modifying the graphene anode to have a high work function and low sheet resistance, and thus achieve extremely high luminous efficiencies (37.2 lm W-1 in fluorescent OLEDs, 102.7 lm W -1 in phosphorescent OLEDs), which are significantly higher than those of optimized devices with an indium tin oxide anode (24.1 lm W -1 in fluorescent OLEDs, 85.6 lm W-1 in phosphorescent OLEDs). We also fabricate flexible white OLED lighting devices using the graphene anode. These results demonstrate the great potential of graphene anodes for use in a wide variety of high-performance flexible organic optoelectronics.

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Extremely efficient flexible organic light-emitting diodes with modified graphene anode

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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