Positional Isomers of Phenylacridine/Spirobifluorene as Deep‐Blue Fluorescent Emitters for Organic Light‐Emitting Diodes

Designing deep-blue fluorophores with a low CIEy is an important request for organic light-emitting diode (OLED) technology either display applications or to develop new such as light source antibacterial properties. The challenge of emitting OLEDs mainly relies on the difficulty reach efficient emitters fulfilling all characteristics desired insure high device performance suitable CIE coordinates. Herein, we report synthesis, physico-chemical properties and application emissive layer in OLED two constructed association Spirofluorene-N-PhenylAcridine (SPA-F) SpiroBiFluorene (SBF) molecular fragment. Two emitters, 2,2-SPAF-SBF 2,3-SPAF-SBF have been following similar design strategy. emission wavelength tuned by substitution pattern SBF backbone (meta para linkage). Through structure/properties relationship study, electrochemical, photophysical thermal/morphological are discussed. When used emitter multi-layer OLED, 2,2-SPA-SBF displays reaching EQE ≈1.7% Von 4 V. electroluminescent spectrum λmax below 400 nm (i.e. 394 nm) coordinates (0.182, 0.054). coordinate 0.054 fits NTSC EBU standards.