Sky-Blue Phosphorescent OLEDs with 34.1% External Quantum Efficiency Using a Low Refractive Index Electron Transporting Layer

Sky-Blue Phosphorescent OLEDs with 34.1% External Quantum Efficiency Using a Low Refractive Index Electron Transporting Layer

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 effici...

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Veröffentlicht in:Advanced materials (Weinheim) 2016-06, Vol.28 (24), p.4920-4925
Hauptverfasser: Shin, Hyun, Lee, Jeong-Hwan, Moon, Chang-Ki, Huh, Jin-Suk, Sim, Bomi, Kim, Jang-Joo
Format: Artikel
Sprache:eng
Schlagworte:
blue OLEDs
exciplex forming co-host
low refractive index ETL and HTL
Organic light emitting diodes
Phosphorescence
Quantum efficiency
Refractive index
Refractivity
Simulation
theoretical limit of EQE
Transporting
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Zusammenfassung: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.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201506065