Synthesis and characterization of SFX-based coumarin derivatives for OLEDs

Two coumarin derivatives based on spiro [fluorene-9,9′-xanthene] (SFX), named SFX-CS and SFX-CD, were successfully synthesized and their optical and electrochemical properties have been characterized. SFX-CS and SFX-CD were fabricated as dopant in TBADN-hosted OLED devices. The results show that SFX-CS exhibits better device efficiencies with maximum brightness of 6995 cd/m2, maximum luminous efficiency of 8.24 cd/A and maximum external quantum efficiency (EQE) of 3.86% at 10% doping concentration.