Highly efficient blue organic electrophosphorescence devices using a trifluorine-replaced iridium complex

Highly efficient blue phosphorescent organic light-emitting devices have been achieved by using a new emitter Iridium complex, bis[(3,4,5-trifluorophenyl)-pyridinato-N,C2′] picolinate (F3Irpic). For a mCP:4%F3Irpic device, blue emission with a maximum power efficiency of 18.1 lm/W has been realized, which is much higher than those of FIrpic based devices. The emission peak was located at 480 nm with a subpeak at 511 nm. By using an optimized device structure with a better host material, performance of the device can be further increased to give a maximum power efficiency of 33.7 lm/W.

Graphical abstractHighly efficient blue phosphorescent organic light-emitting devices have been achieved by using F3Irpic as the new blue phosphorescent emitter.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Efficient blue phosphorescent OLEDs have been achieved using a new iridium complex. ► A maximum power efficiency of 18.1 lm/W has been realized in a simple structure. ► With an optimized structure, a maximum efficiency of 33.7 lm/W has been achieved.