| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1264049 | Organic Electronics | 2012 | 5 Pages |
We developed high-efficiency multi-photon emission (MPE) blue phosphorescent OLEDs with external quantum efficiency exceeding 40% at 100 cd m−2. In these MPE devices, we used a blue phosphorescent emitter, FIrpic and pyridine-containing electron-transporters, B3PyPB and B3PyMPM, B4PyMPM. We also used a well-known electron-transporter, BCP for comparison. We used a combination of TAPC/MoO3/Al/Liq layers as the charge-generation layer unit. An optimized MPE device showed an extremely high current efficiency of over 90 cd A−1 and a high power efficiency of over 40 lm W−1 at 100 cd m−2 without any outcoupling enhancement.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► We made multi-photon emission (MPE) blue phosphorescent OLEDs with external quantum efficiency exceeding 40% at 100 cd/m2. ► In these MPE devices, we used a blue phosphorescent emitter, FIrpic and pyridine-containing electron-transporters. ► We used a combination of TAPC/MoO3/Al/Liq layers as the charge-generation layer (CGL) unit. ► An optimized device shows a current efficiency of over 90 cd/A and a power efficiency of over 40 lm/W at 100 cd/m2.
