Organic thin film electroluminescent device
First Claim
Patent Images
1. An organic thin film electroluminescent device comprising:
- an anode;
a hole transport layer in contact with said anode, the hole transport layer having a first energy band gap;
a potential barrier layer in contact with the hole transport layer, said potential barrier layer having a second energy band gap which is larger than said first energy band gap;
a light emission layer in contact with said potential barrier layer, said light emission layer having a third energy band gap which is smaller than said second energy band gap; and
a cathode in contact with said light emission layer, wherein the hole transport layer is made of a material containing at least a ditriphenylaminestyryl derivative expressed by the following formula;
##STR1377## where A is one selected from the group consisting of substituted alkylidene groups having not less than 10 carbon atoms, non-substituted alkylidene groups having not less than 10 carbon atoms, cycloalkylidene groups, oxygen atom, sulfur atom, substituted amino groups and non-substituted amino groups;
where Ar1, Ar3, Ar4 and Ar5 are one selected from the group consisting of substituted arylene groups and non-substituted arylene groups;
where Ar2 and Ar6 are one selected from the group consisting of substituted aryl groups and non-substituted aryl groups; and
where X and Y are substituted groups expressed by the formula;
##STR1378## where Ar7 and Ar8 are one selected from the group consisting of substituted aryl groups and non-substituted aryl groups; and
where R1 is one selected from the group consisting of hydrogen atom, halogen atom, hydroxyl groups, substituted amino groups, non-substituted amino groups, substituted alkoxy groups, non-substituted alkoxy groups, substituted alkyl groups having 1-6 carbon atoms, and non-substituted alkyl groups having 1-6 carbon atoms.
4 Assignments
0 Petitions
Accused Products
Abstract
A hole transport layer in an organic electroluminescent device is made of a material containing at least a ditriphenylaminestyryl derivative expressed by the general formula: ##STR1## where A is selected from the group consisting of substituted and non-substituted alkylidene groups, cycloalkylidene groups, oxygen atom, sulfur atom, amino groups; where Ar1, Ar3, Ar4 and Ar5 are selected from the group consisting of substituted and non-substituted arylene groups; where Ar2 and Ar6 are one selected from the group consisting of substituted aryl groups and non-substituted aryl groups; and where X and Y are substituted groups expressed by the formula: ##STR2## where Ar7 and Ar8 are selected from the group consisting of substituted aryl groups and non-substituted aryl groups; and where R1 is one selected from the group consisting of hydrogen atom, halogen atom, hydroxyl groups, substituted and non-substituted amino groups, substituted and non-substituted alkoxy groups, substituted and non-substituted alkyl groups having 1-6 carbon atoms.
-
Citations
48 Claims
-
1. An organic thin film electroluminescent device comprising:
-
an anode; a hole transport layer in contact with said anode, the hole transport layer having a first energy band gap; a potential barrier layer in contact with the hole transport layer, said potential barrier layer having a second energy band gap which is larger than said first energy band gap; a light emission layer in contact with said potential barrier layer, said light emission layer having a third energy band gap which is smaller than said second energy band gap; and a cathode in contact with said light emission layer, wherein the hole transport layer is made of a material containing at least a ditriphenylaminestyryl derivative expressed by the following formula;
##STR1377## where A is one selected from the group consisting of substituted alkylidene groups having not less than 10 carbon atoms, non-substituted alkylidene groups having not less than 10 carbon atoms, cycloalkylidene groups, oxygen atom, sulfur atom, substituted amino groups and non-substituted amino groups;
where Ar1, Ar3, Ar4 and Ar5 are one selected from the group consisting of substituted arylene groups and non-substituted arylene groups;
where Ar2 and Ar6 are one selected from the group consisting of substituted aryl groups and non-substituted aryl groups; and
where X and Y are substituted groups expressed by the formula;
##STR1378## where Ar7 and Ar8 are one selected from the group consisting of substituted aryl groups and non-substituted aryl groups; and
where R1 is one selected from the group consisting of hydrogen atom, halogen atom, hydroxyl groups, substituted amino groups, non-substituted amino groups, substituted alkoxy groups, non-substituted alkoxy groups, substituted alkyl groups having 1-6 carbon atoms, and non-substituted alkyl groups having 1-6 carbon atoms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeSamsung Display Company Limited (Samsung Electronics Co. Ltd.)
-
Original AssigneeNEC Corporation
-
InventorsTsuruoka, Eriko, Ikeda, Naoyasu, Utsugi, Koji, Hirano, Akira
-
Primary Examiner(s)YAMNITZKY, MARIE ROSE
-
Application NumberUS08/542,624Time in Patent Office1,187 DaysField of Search313/504, 313/506, 428/690, 428/704, 428/917, 428/332, 428/411.1, 428/457, 564/426, 564/431, 564/433, 564/434US Class Current428/690CPC Class CodesH10K 2102/103 comprising indium oxides, e...H10K 50/11 characterised by the electr...H10K 85/324 comprising aluminium, e.g. ...H10K 85/615 Polycyclic condensed aromat...H10K 85/631 Amine compounds having at l...H10K 85/633 comprising polycyclic conde...Y10S 428/917 ElectroluminescentY10T 428/26 Web or sheet containing str...Y10T 428/31504 Composite [nonstructural la...Y10T 428/31678 Of metal
