Journal
ADVANCED MATERIALS
Volume 28, Issue 24, Pages 4920-4925Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201506065
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Funding
- National Research Foundation (NRF) - Ministry of Science, ICT and Future Planning (MSIP) [2014R1A2A1A01002030]
- National Research Foundation of Korea [2014R1A2A1A01002030] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Blue-phosphorescent organic light-emitting diodes (OLEDs) with 34.1% external quantum efficiency (EQE) and 79.6 lm W-1 are demonstrated using a hole-transporting layer and electron-transporting layer with low refractive index values. Using optical simulations, it is predicted that outcoupling efficiencies with EQEs > 60% can be achieved if organic layers with a refractive index of 1.5 are used for OLEDs.
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