OLEDs having high efficiency and excellent lifetime

1. An OLED device comprising a cathode, an anode, and having therebetween a light-emitting layer wherein the light-emitting layer comprises

(a) a 2-arylanthracene compound represented by:

and

(b) a light-emitting second anthracene compound, the light-emitting second anthracene compound being an N,N,N′,N′,9,10-hexaaryl-2,6-anthracenediamine compound,

wherein:

d 1 , d 3 -d 5 , d 7 , and d 8 are hydrogen;

d 6 is an aryl group;

each g is the same or different and each represents an independently selected substituent, provided that two substituents may combine to form a ring group;

p, r, and s are independently 0-5, and

the selected substituent is a C 4 -C 30 aryl group.

2. The device of claim 1 , wherein the compound of subparagraph (a) is represented by:

wherein:

d 1 , d 3 -d 5 , d 7 and d 8 are hydrogen;

each g is the same or different and each represents an independently selected substituent, provided that two substituents may combine to form a ring group;

the selected substituent is a C 4 -C 30 aryl group; and

p, r s, and t are independently 0-5.

3. The device of claim 1 wherein the compound of subparagraph (a) is represented by:

4. The device of claim 1 wherein the compound of subparagraph (b) is represented by:

5. The device of claim 1 wherein the compound of subparagraph (b) is present in an amount up to 20 volume %.

6. The device of claim 5 wherein the compound of subparagraph (b) is present in an amount up to 10 volume %.

7. The device of claim 1 wherein the 1931 CIE x coordinate of the electroluminescent spectrum is between 0.21 and 0.30 and the 1931 CIE y coordinate of the electroluminescent spectrum is between 0.60 and 0.70.

8. The device of claim 1 wherein (b) has an oxidation potential that is lower than 0.8 V versus SCE.

9. The device of claim 1 wherein (a) is selected from the following

Inv-A53

Inv-A54

Inv-A55

Inv-A56

Inv-A57

Inv-A58

Inv-A59

Inv-A60

Inv-A61

Inv-A62

Inv-A63

Inv-A64

Inv-A65

Inv-A66

Inv-A67

Inv-A68

Inv-A69

Inv-A70

Inv-A71

Inv-A72

Inv-A73

Inv-A74

Inv-A75

Inv-A76

Inv-A77

Inv-A78

Inv-A79

Inv-A80

Inv-A81

Inv-A82

Inv-A83

Inv-A84

Inv-A85

Inv-A86

Inv-A87

Inv-A88

Inv-A89

Inv-A90

Inv-A91

Inv-A92

Inv-A93

Inv-A94

Inv-A95

Inv-A96

Inv-A97

Inv-A98

Inv-A99

Inv-A100

Inv-A101

Inv-A102

Inv-A103

Inv-A104

Inv-A105

Inv-A106

Inv-A107

Inv-A108

Inv-A109

Inv-A110

Inv-A112

Inv-A114

Inv-A116

A119

A120

A121

A128

A129

A132

A137

;

and (b) is selected from the following:

Inv-B1

Inv-B2

Inv-B3

Inv-B4

Inv-B5

Inv-B6

Inv-B7

Inv-B8

Inv-B9

Inv-B10

Inv-B11

Inv-B12

Inv-B13

Inv-B14

Inv-B15

Inv-B16

Inv-B17

Inv-B18

Inv-B19

Inv-B20

Inv-B21

Inv-B22

Inv-B23

Inv-B24

Inv-B25

Inv-B26

Inv-B27

Inv-B28

Inv-B29

Inv-B30

Inv-B31

Inv-B32

Inv-B33

Inv-B34

Inv-B35

Inv-B36

Inv-B37

Inv-B38

Inv-B39

Inv-B40

Inv-B41

Inv-B42

Inv-B43

Inv-B44

Inv-B45

Inv-B46

Inv-B47

Inv-B48

Inv-B49

Inv-B50

Inv-B51

Inv-B52

Inv-B53

Inv-B54

Inv-B55

Inv-B56

Inv-B57

Inv-B58

Inv-B59

Inv-B60

Inv-B61

Inv-B62

Inv-B63

Inv-B64

Inv-B65

Inv-B66

Inv-B67

Inv-B68

Inv-B69

Inv-B70

Inv-B71

Inv-B72

Inv-B73

Inv-B74

Inv-B75

Inv-B76

Inv-B77

Inv-B78

Inv-B79

Inv-B80

Inv-B81

Inv-B82

Inv-B83

Inv-B84

Inv-B85

Inv-B86

Inv-B87

Inv-B88

Inv-B122

Inv-B123

Inv-B124

Inv-B125

Inv-B126

Inv-B127

Inv-B128

Inv-B129

Inv-B130

Inv-B131

Inv-B132

Inv-B133

Inv-B134

Inv-B135

Inv-B136

Inv-B137

Inv-B138

Inv-B139

Inv-B140

Inv-B141

Inv-B142

Inv-B143

Inv-B144

Inv-B145

Inv-B146

Inv-B147

Inv-B148

Inv-B149

Inv-B150

.