Organic electroluminescent device and based on 2,5-diaminoterephthalic acid derivatives
申请人:Richter Andreas
公开号:US20050003230A1
公开(公告)日:2005-01-06
The invention relates to an organic electroluminescent device which contains 2,5-diaminoterephthalic acid derivatives of formula 1a as emitter substances in one or several emitter layers in a pure or doped manner. The ring A is a triple unsaturated benzole ring wherein R
4′
and R
8′
are zero or ring A is a double unsaturated ring respectively provided with a double bond in the 1,2 position and 4,5 position, and wherein R
10
is a nitrile radical —CN or a radical C(═X
1
)—X
2
R
1
, R
11
is a nitrile radical —CN or a radical —C(═X
3
)—X
4
R
5
, X
1
and X
3
are oxygen, sulfur or imino, X
2
and X
4
are oxygen, sulfur or optionally substituted amino, R
1
-R
8
, R
4′
and R
8
are H, C1-20-alkyl, aryl, heteroaryl, R
4
and R
8
can be halogen, nitro, cyanogen or amino, R
2
-R
4
, R
6
-R
8
, R
4′
and R
8′
can be trifluoromethyl or pentafluorophenyl, and wherein certain radicals can form a saturated or unsaturated ring. The devices are characterized by narrow emission bands, low driver voltages, high photometric efficiency and high thermal stability within a broad spectral range.
本发明涉及一种有机电致发光装置,其中在一个或多个发射层中以纯形式或掺杂形式包含式1a的2,5-二氨基对苯二甲酸衍生物作为发射物质。环A是三重不饱和苯环,其中R4'和R8'为零,或环A是双重不饱和环,分别在1,2位和4,5位具有双键,且R10是腈基-CN或基团C(═X1)-X2R1,R11是腈基-CN或基团-C(═X3)-X4R5,X1和X3是氧、硫或亚胺基,X2和X4是氧、硫或可选取代的氨基,R1-R8、R4'和R8'是氢、C1-20-烷基、芳基、杂环芳基,R4和R8可以是卤素、硝基、氰基或氨基,R2-R4、R6-R8、R4'和R8'可以是三氟甲基或五氟苯基,其中某些基团可以形成饱和或不饱和环。该装置具有窄的发射带宽、低驱动电压、高光度效率以及在广泛的光谱范围内高热稳定性的特点。