Stable and efficient fluorescent red and green dyes for external and internal conversion of blue OLED emission

We have synthesized a series of diphenylamine substituted fluorescent dyes and investigated their optical and electroluminescent properties and thermal and photooxidative stabilities. The incorporation of bulky phenyl groups reduces concentration quenching. Their improved photoluminescent and electrooptical properties suggests their use in color-conversion materials and as dopants in OLEDs.