申请人:Ono Youhei
公开号:US20110215310A1
公开(公告)日:2011-09-08
A compound represented by the following Formula (1) is useful as an electron transport material of an organic EL device, and an organic EL device comprising the compound in the electron transport layer is long in life, and low in drive voltage:
wherein G is an n-valent link, n is an integer of 2 to 4; R
1
to R
4
are each independently hydrogen, a monovalent group, or a free valency bonded with G, and R
5
to R
8
are each independently hydrogen or a monovalent group, and one of R
1
to R
4
is a free valency bonded with G; and n groups of 2,3′-bipyridyl may be the same or different with each other.
以下式子(1)所表示的化合物,可用作有机EL器件的电子传输材料,且在电子传输层中含有该化合物的有机EL器件寿命长,驱动电压低:其中G是n价键,n为2至4的整数;R1至R4各自独立地是氢、一价基团或与G键合的自由价,而R5至R8各自独立地是氢或一价基团,且R1至R4中的一个是与G键合的自由价;并且n个2,3′-联吡啶基团可以相同或不同。