Title of article :
A highly efficient deep blue fluorescent OLED based on diphenylaminofluorenylstyrene-containing emitting materials
Author/Authors :
Kim، نويسنده , , Seul Ong and Lee، نويسنده , , Kum Hee and Kim، نويسنده , , Gu Young and Seo، نويسنده , , Ji Hoon and Kim، نويسنده , , Young Kwan and Yoon، نويسنده , , Seung Soo، نويسنده ,
Issue Information :
دوماهنامه با شماره پیاپی سال 2010
Abstract :
We have designed and synthesized five blue emitters based on diphenylaminofluorenylstyrene emitting core groups. Multilayered OLEDs were fabricated using these materials as dopants in a 2-methyl-9,10-di(naphthen-2-yl)anthracene (MADN) host. One of them in particular a deep blue OLED using dopant 9-[4-(2-diphenylamino-9,9-diethylfluoren-7-yl)phenyl]-9-phenylfluorene (3) at 15% doping concentration exhibited a maximum luminance of 4720 cd m−2 at 9.0 V, a luminous efficiency of 5.3 cd A−1 at 20 mA cm−2, a power efficiency of 2.9 lm W−1 at 20 mA cm−2, an external quantum efficiency of 4.8% at 20 mA cm−2, and CIE coordinates (x = 0.15, y = 0.13) at 8.0 V. Furthermore, this deep blue device had very stable CIE coordinates of (x = 0.15, y = 0.13) that did not vary with doping concentration from 5% to 15%.
Keywords :
OLEDs , Blue fluorescent dopant , Horner–Wadsworth–Emmons reaction , Diphenylaminofluorenylstyrene
Journal title :
Synthetic Metals
Journal title :
Synthetic Metals