A novel heteroterfluorene for efficient blue and white OLEDs

A new terfluorene hetero-analogue, 3TTP, introducing pyridinylthiophene as the conjugated constituent, exhibiting promising properties has been synthesized. The OLED device adopted 3TTP as emitting dopant incorporating its parent T3 as host displayed a sky-blue electroluminescence with a good performance (EQE = 3.9%). The blue device was further combined with rubrene gave a white OLED with a splendid EQE of 3.9% and high color purity [CIE = (0.31, 0.35)].

Figure optionsDownload as PowerPoint slideHighlights
► A new thiophene/pyridine-embedded heterofluorene molecule as a new sky-blue fluorescent emitter.
► A significant energy transfer from terfluorene host to heterofluorene guest was observed.
► Highly efficient OLED devices were achieved in both blue and rubrene-incorporated white OLED.