US5085946A
Expired / Lapsed
US
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Electroluminescence device
Assignee: Ricoh Co Ltd
•
Filing: 1989-12-27
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Granted: 1992-02-04
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Expires: 2009-12-27
Abstract
Abstract An electroluminesence device comprising an organic compound having positive-hole-transporting property and a fluorescent organic compound having electron-transporting property in its luminescence layer interposed between a pair of electrodes. When the electroluminescence device comprises a cyclopentadiene derivative having formula (I) as the fluorescent organic compound, the device can emit blue light which has not been attained so far: ##STR1## wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 each independently represent hydrogen, an alkyl group having 1 to 10 carbon atoms, which may have a substituent, an alicyclic group having 5 to 6 carbon atoms, an alkoxyl group having 1 to 6 carbon atoms, which may have a substituent, a halogen, an acyl group, a hydroxyl group, an aryloxy group, an aryl group which may have a substituent, an allyl group, or an aldehyde group.
Inventors
- 👤 Shogo Saito
- 👤 Tetsuo Tsutsui
- 👤 Chihaya Adachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:45
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/26; C; C09; C09K; C09K11/00; C09K11/06; H05B33/14; H05B33/22; H05B33/24; H10; H10K; H10K85/00; H10K85/60; H10K85/615; H10K85/621; H10K85/30; H10K85/321; H10K85/324; H10K85/631; H10K85/649; H10K85/656; H10K85/6565; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
126 words
An electroluminescence device comprising: a positive electrode; a luminescence layer in direct contact with said positive electrode, said luminescence layer consisting of an organic compound having positive-hole-transporting property selected from the group consisting of ##STR443## a fluorescent orgainc compound having electron-transporting property selected from the group consisting of ##STR444## wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 each independently represent hydrogen, alkyl of 1 to 10 carbon atoms which may have a substituent, alicyclic of 5 to 6 carbon atoms, alkoxyl of 1 to 6 carbon atoms which may have a substituent, halogen, acyl, hydroxyl, aryloxy, aryl which may have a substituent, allyl or aldehyde; and a negative electrode in direct contact with said luminescence layer.
Claim 2
Dependent Claim
126 words
An electroluminescence device comprising: a positive electrode; a luminescence layer in direct contact with said positive electrode, said luminescence layer consisting of an organic compound having positive-hole-transporting property selected from the group consisting of ##STR443## a fluorescent orgainc compound having electron-transporting property selected from the group consisting of ##STR444## wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 each independently represent hydrogen, alkyl of 1 to 10 carbon atoms which may have a substituent, alicyclic of 5 to 6 carbon atoms, alkoxyl of 1 to 6 carbon atoms which may have a substituent, halogen, acyl, hydroxyl, aryloxy, aryl which may have a substituent, allyl or aldehyde; and a negative electrode in direct contact with said luminescence layer.
Claim 3
Dependent Claim
13 words
The device as claimed in claim 1, wherein sid alkyl is phenyl substituted.
Claim 4
Dependent Claim
14 words
The device as claimed in claim 1, wherein said alicyclic is cyclopentyl or cyclohexyl.
Claim 5
Dependent Claim
12 words
The device as claimed in claim 1, wherein said alicyclic is cyclopentadienyl.
Claim 6
Dependent Claim
13 words
The device as claimed in claim 1, wherein said alkoxyl is phenyl substituted.
Claim 7
Dependent Claim
14 words
The device as claimed in claim 1, wherein said acyl is acetyl or benzoyl.
Claim 8
Dependent Claim
15 words
The device as claimed in claim 1, wherein said aryl is phenyl, biphenyl or naphthyl.
Claim 9
Dependent Claim
29 words
The device as claimed in claim 1, wherein said aryl group is substituted by alkyl of 1 to 4 carbons, alkoxyl of 1 to 4 carbons, halogen or dialkylamino.
Claim 10
Dependent Claim
20 words
The device as claimed in claim 1, wherein said luminescence layer has a thickness of 200 Å to 3000 Å.
Claim 11
Dependent Claim
35 words
The device as claimed in claim 1, wherein a weight ratio of said organic compound having positive-hole-transporting property to said fluorescent organic compound in said luminescence layer is in the range of 10/90 to 90.10.
Claim 12
Dependent Claim
32 words
The device as claimed in claim 1, wherein said positive electrode comprises a material selected from the group consisting of gold, platinum, palladium, tin oxide, indium-tin oxide and an organic electroconductive material.
Claim 13
Dependent Claim
23 words
The device as claimed in claim 1, wherein said positive electrode is transparent to light having a wavelength of 400 nm or more.
Claim 14
Dependent Claim
25 words
The device as claimed in claim 1, wherein said negative electrode comprises a material selected from the group consisting of Mg, Al, Ag and In.
Claim 15
Dependent Claim
145 words
An electroluminescence device comprising: a positive electrode; a luminescence layer comprising a first layer in direct contact with said positive electrode, said first layer consisting of an organic compound having positive-hole-transporting property selected from the group consisting of ##STR445## a second layer in direct contact with said first layer, said second layer consisting of a fluorescent organic compound having electron-transporting property selected from the group consisting of ##STR446## wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 each independently represent hydrogen, alkyl of 1 to 10 carbon atoms which may have a substituent, alicyclic of 5 to 6 carbon atoms, alkoxyl of 1 to 6 carbon atoms which may have a substituent, halogen, acyl, hydroxyl, aryloxy, aryl which may have a substituent, allyl or aldehyde; and a negative electrode in direct contact with said second layer.
Claim 16
Dependent Claim
145 words
An electroluminescence device comprising: a positive electrode; a luminescence layer comprising a first layer in direct contact with said positive electrode, said first layer consisting of an organic compound having positive-hole-transporting property selected from the group consisting of ##STR445## a second layer in direct contact with said first layer, said second layer consisting of a fluorescent organic compound having electron-transporting property selected from the group consisting of ##STR446## wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 each independently represent hydrogen, alkyl of 1 to 10 carbon atoms which may have a substituent, alicyclic of 5 to 6 carbon atoms, alkoxyl of 1 to 6 carbon atoms which may have a substituent, halogen, acyl, hydroxyl, aryloxy, aryl which may have a substituent, allyl or aldehyde; and a negative electrode in direct contact with said second layer.
Claim 17
Dependent Claim
13 words
The device as claimed in claim 14, wherein said alkyl is phenyl substituted.
Claim 18
Dependent Claim
14 words
The device as claimed in claim 14, wherein said alicyclic is cyclopentyl or cyclohexyl.
Claim 19
Dependent Claim
12 words
The device as claimed in claim 14, wherein said alicyclic is cyclopentadienyl.
Claim 20
Dependent Claim
13 words
The device as claimed in claim 14, wherein said alkoxy is phenyl substituted.
Claim 21
Dependent Claim
15 words
The device as claimed in claim 14, wherein said acyl group is acetyl or benzoyl.
Claim 22
Dependent Claim
15 words
The device as claimed in claim 14, wherein said aryl is phenyl, biphenyl or naphthyl.
Claim 23
Dependent Claim
29 words
The device as claimed in claim 14, wherein said aryl group is substituted by alkyl of 1 to 4 carbons, alkoxyl of 1 to 4 carbons, halogen or dialkylamino.
Claim 24
Dependent Claim
19 words
The device as claimed in claim 14, wherein said first layer has a thickness of 100 Åto 2000 Å.
Claim 25
Dependent Claim
23 words
The device as claimed in claim 14, wherein said second layer has a thickness in the range of 100 Å to 2000 Å.
Claim 26
Dependent Claim
32 words
The device as claimed in claim 14, wherein said positive electrode comprises a material selected from the group consisting of gold, platinum, palladium, tin oxide, indium-tin oxide and an organic electroconductive material.
Claim 27
Dependent Claim
23 words
The device as claimed in claim 14, wherein said positive electrode is transparent to light having a wavelength of 400 nm or more.
Claim 28
Dependent Claim
25 words
The device as claimed in claim 14, wherein said negative electrode comprises a material selected from the group consisting of Mg, Al, Ag and In.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-03 | 1995-08-05 | 1996-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-03 | 1999-08-05 | 2000-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-03 | 2003-08-05 | 2004-02-04 | $7700.00 | Window Closed / Lapsed |