Journal
NATURE PHOTONICS
Volume 6, Issue 2, Pages 105-110Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHOTON.2011.318
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Funding
- Basic Research Program
- Global Frontier Research Center for Advanced Soft Electronics through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2009-0067533, 2009-0075025, 2011-0006268, 2009-0090177]
- Converging Research Center through the Ministry of Education, Science and Technology [2010K001431]
- National Research Foundation of Korea [2010-50193, 2011-0031635, 2009-0093248, 2009-0075025, 2009-0090177, 2009-0067533, 2009-0093247, 2011-0031639] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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.
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