Journal
OPTICS EXPRESS
Volume 21, Issue 5, Pages 5424-5431Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.005424
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Funding
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [CAFDC-20100009890]
- Industrial Strategic Technology Development Program [10035573]
- Ministry of Knowledge Economy (MKE, Korea)
- LG Display Co., Ltd.
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Quasi-periodic WO3 nanoislands are introduced to extract two optical modes in organic light-emitting diodes. The nano-scaled and size-tunable WO3 islands were fabricated by use of wet-etching with self-aggregated Ag mask. The improvement of light extraction efficiency originates to the recovery of light losses which are surface plasmon mode and waveguide mode. As a result, external quantum efficiency and power efficiency were increased. No changes in emission spectrum and CIE color coordinates with WO3 nanoislands at various observation angles are desirable if this device is to be utilized in optical system. Furthermore, cost-effective fabrication makes it possible to adopt this system in large area fabrication. (C) 2013 Optical Society of America
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