Abstract
In an organic light-emitting diode (OLED), only about 20-30% of the generated light can be extracted because of the light lost to the thin film guided modes and surface plasmon. Using corrugated high-index-refractive substrates, the thin film guided modes can be effectively out-coupled from the device because of the high index substrate and the loss to the surface plamon is suppressed due to the corrugated structure. With an additional macro lens attached to the substrate to extract the substrate mode, we finally demonstrated a green phosphorescent OLED with an extremely high external quantum efficiency of 63%.
Original language | English |
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Pages (from-to) | 8974-8978 |
Number of pages | 5 |
Journal | ACS Applied Materials and Interfaces |
Volume | 7 |
Issue number | 17 |
DOIs | |
State | Published - 6 May 2015 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2015 American Chemical Society.
Keywords
- OLED
- high-refractive-index substrate
- light extraction
- surface plasmon mode