申请人:Yabunouchi Nobuhiro
公开号:US20070075635A1
公开(公告)日:2007-04-05
An organic electroluminescent device (
1
) comprising, a cathode (
80
), an anode (
20
), an emitting layer (
50
) provided between the cathode and the anode, and at least a first layer (
30
) and a second layer (
40
) stacked between the anode (
20
) and the emitting layer (
50
) in this order from the anode (
20
) side, the first layer (
30
) having a hole mobility of 7.0×10
−4
(cm
2
/Vs, electric field intensity: 2.5×10
4
(V/cm)) or more, the second layer (
40
) having a hole mobility of 7.0×10
−4
(cm
2
/Vs, electric field intensity: 2.5×10
4
(V/cm)) or more, and a main compound which forms the first layer (
30
) differing from a main compound which forms the second layer (
40
).
一种有机电致发光器件(1),包括:阴极(80)、阳极(20)、放射层(50),放射层(50)位于阴极和阳极之间,以及至少一个第一层(30)和第二层(40),第一层(30)和第二层(40)依次从阳极(20)一侧堆叠于放射层(50)之前,第一层(30)具有7.0×10^-4(cm2/Vs, 电场强度:2.5×10^4(V/cm))或更高的空穴迁移率,第二层(40)具有7.0×10^-4(cm2/Vs, 电场强度:2.5×10^4(V/cm))或更高的空穴迁移率,并且形成第一层(30)的主要化合物与形成第二层(40)的主要化合物不同。