Abstract
A high-efficiency deep-blue organic light emitting diode was fabricated by using a novel blue light-emitting dye 2,7-Bis{2[phenyl(m-tolyl)amino]-9,9- dimethyl-fluroene-7-y1}-9,9-dimethyl- fluroene doped in 4,4′-bis(9- carbazolyl)-biphenyl in a low-polarity host. The resultant device showed a highly-saturate blue light with CIE coordinates of (0.14, 0.06) with a record-high external quantum efficiency of 4.6 % at 100 cd/m2, favoring the use for wide-color-gamut and low-energy-consumption OLED display. © 2008 SID.