Phosphorescent OLEDs: Sky-Blue Phosphorescent OLEDs with 34.1% External Quantum Efficiency Using a Low Refractive Index Electron Transporting Layer (Adv. Mater. 24/2016).
J.-J. Kim and co-workers achieve highly efficient blue organic light-emitting diodes (OLEDs) using a low-refractive-index layer. As described on page 4920, an external quantum efficiency over 34% is achieved, owing to the low refractive index of the materials. A milepost and a shining entrance of the castle are the metaphor indicating the way to highly efficient blue OLEDs. On the way to the castle, the depicted chemical structures serve as the light-emitting layer.
Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, South Korea.
Hyun
H
Shin
Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, South Korea.
Jeong-Hwan
JH
Lee
Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, South Korea.
Chang-Ki
CK
Moon
Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, South Korea.
Jin-Suk
JS
Huh
Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, South Korea.
Bomi
B
Sim
Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, South Korea.|Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul, 151-744, South Korea.
Jang-Joo
JJ
Kim
blue OLEDs; exciplex forming co-host; low refractive index ETL and HTL; theoretical limit of EQE