Title of article :
Synthesis, characterization, and properties of novel bis(aryl)carbazole-containing N-coumarin derivatives
Author/Authors :
Kochapradist، نويسنده , , Palita and Sunonnam، نويسنده , , Thitiya and Prachumrak، نويسنده , , Narid and Namuangruk، نويسنده , , Supawadee and Keawin، نويسنده , , Tinnagon and Jungsuttiwong، نويسنده , , Siriporn and Sudyoadsuk، نويسنده , , Taweesak and Promarak، نويسنده , , Vinich، نويسنده ,
Abstract :
A series of novel N-coumarin derivatives containing oligothiophene-substituted N-coumarins as the core and bis(aryl)carbazoles as the substituent were synthesized and characterized. Their optical, electrochemical, and thermal properties were investigated. The electroluminescence (EL) properties of the selected materials were also studied. Solution-processed OLEDs with green and yellow light emission, turn-on voltages of 2.7–2.9 V, and maximum luminance efficiencies of up to 3.94 cd A−1 at 17.6 mA cm−2 (maximum power efficiency of 1.62 lm W−1) were prepared.
Keywords :
organic light-emitting diode , Bis(aryl)carbazole , N-Coumarin , Non-doped emitter , fluorescence
