A highly efficient deep blue fluorescent OLED based on diphenylaminofluorenylstyrene-containing emitting materials

作者：Kim Seul Ong; Lee Kum Hee; Kim Gu Young; Seo Ji Hoon; Kim Young Kwan^*; Yoon Seung Soo

来源：Synthetic Metals, 2010, 160(11-12): 1259-1265.

DOI：10.1016/j.synthmet.2010.03.020

• OLEDs
• Blue fluorescent dopant
• Diphenylaminofluorenylstyrene
• Horner-Wadsworth-Emmons reaction

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%.

• 出版日期2010-6