31.3: Organic EL Materials Based on Styryl and Amine Derivatives

Abstract

Excellent organic electroluminescent materials are needed to obtain the color EL devices with high performance. We have succeeded in realizing bright and efficient devices with long lifetime in various color regions, based on styryl and amine derivatives.

Recent Development of Blue Fluorescent OLED Materials and Devices

“…Chromophores of this type of structure are particularly easy to manipulate by molecular engineering either via change in the (aryl)aminostyryl end of the structure or via change of the center core. Bits and pieces of information regarding the EL performance of this dopant have been disclosed by Hosokawa and coworkers at Idemitsu in the past, but never with a structure [22].…”

Blue fluorescent OLED materials and their application for high-performance devices

“…Based on this new host-dopant system, the blue emitter was commercialized for the first multicolor display in 1999. The styrylamine- or amine-doped systems were found to enhance stable hole injection and efficient emission [3]. Various arylamine dopants with strong blue fluorescence were tested [3].…”

“…The styrylamine- or amine-doped systems were found to enhance stable hole injection and efficient emission [3]. Various arylamine dopants with strong blue fluorescence were tested [3]. Until 2004, a lifetime of 7000 h at 1000 cd m −2 for pure blue emission was achieved.…”

Synthesis and Luminescence Property of 4,4′‐Bis(2,2‐di(4‐fluorophenyl)vinyl)biphenyl for Organic Blue‐Light‐Emitting Diodes

“…For fullcolor OLED display applications, it is essential to deliver a set of primary red, green and blue emitters with high luminous efficiency for the reason that other colors of OLED may be obtained by using color-changing medium technique. [2][3][4] In present OLEDs, blue emitters, either fluorescent or phosphorescent materials, both remain the weakest link in the development of OLEDs. 5,6 Blue fluorescent materials have been widely studied for a long time.…”