| 초록 |
A new yellow fluorescent material, (2Z)-3-[4,4''-bis(dimethylamino)-1,1':4',1''-terphenyl-2'-yl]-2-(4-cyanophenyl)acetonitrile (BDAT-CP) was synthesized for organic light-emitting diodes (OLEDs). This material designed by changing molecular structure of (2Z)-3-[4,4''-bis(dimethylamino)-1,1':4',1''-terphenyl-2'-yl]-2-phenylacrylonitrile (BDAT-P). The UV-Visible absorption peak of BDAT-CP was measured to be at 329 nm and its photoluminescence (PL) emission spectrum showed reddish orange light-emission peaked at 615 nm in chloroform solvent. The devices fabricated by BDAT-CP as emitting layer material. The device structures were ITO / NPB / BDAT-CP / Bphen / Liq / Al. The peak of electroluminescence (EL) spectra of device was measured 99.37 cd/m2 at 60 mA/cm2. And the device exhibits a efficiency of 0.4 cd/A and quantum efficiency of 0.37 % which shows superior properties than other BDAT series. CIExy coordinate of device was measured to be (0.625,0.373). |
