US5059862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent device with improved cathode
Assignee: Global OLED Technology LLC
•
Filing: 1990-07-26
•
Granted: 1991-10-22
•
Expires: 2010-07-26
Abstract
Abstract An internal junction electroluminescent device is disclosed containing, in sequence, an anode, an organic hole injecting and transporting zone, an organic electron injecting and transporting zone forming a junction with the organic hole injecting and transporting zone, and a cathode comprised of a layer contacting the organic electron injecting and transporting zone containing a combination of magnesium and aluminum. Aluminum accounts for at least 80 percent of the cathode layer.
Inventors
- 👤 Steven A. VanSlyke
- 👤 Ching W. Tang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:42
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/26; C; C09; C09K; C09K11/00; C09K11/06; H05B33/14; H10; H10K; H10K50/00; H10K50/80; H10K50/805; H10K50/82; H10K50/826; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
83 words
An internal junction organic electroluminescent device comprising in sequence, an anode, an organic hole injecting and transporting zone, an organic electron injecting and transporting zone, and a cathode comprised of a layer contacting the organic electron injecting and transporting zone containing a combination of magnesium and at least one metal having a higher work function than magnesium, characterized in that the one metal having a higher work function than magnesium is aluminum and accounts for at least 80 percent of the cathode layer.
Claim 2
Dependent Claim
83 words
An internal junction organic electroluminescent device comprising in sequence, an anode, an organic hole injecting and transporting zone, an organic electron injecting and transporting zone, and a cathode comprised of a layer contacting the organic electron injecting and transporting zone containing a combination of magnesium and at least one metal having a higher work function than magnesium, characterized in that the one metal having a higher work function than magnesium is aluminum and accounts for at least 80 percent of the cathode layer.
Claim 3
Dependent Claim
30 words
An internal junction organic electroluminescent device according to claim 1 further characterized in that said organic electron injecting and transporting zone is comprised of a stilbene or chelated oxinoid compound.
Claim 4
Dependent Claim
19 words
An internal junction organic electroluminescent device according to claim 1 further characterized in that said anode is light transmissive.
Claim 5
Dependent Claim
32 words
An internal junction organic electroluminescent device according to claim 1 further characterized in that said cathode additionally includes a backing layer comprised of a metal having a higher work function than magnesium.
Claim 6
Dependent Claim
21 words
An internal junction organic electroluminescent device according to claim 4 further characterized in that said backing layer is comprised of aluminum.
Claim 7
Dependent Claim
31 words
An internal junction organic electroluminescent device according to claim 1 further characterized in that said cathode layer contacting said electron injecting and transporting zone has a thickness of at least 25Å.
Claim 8
Dependent Claim
31 words
An internal junction organic electroluminescent device according to claim 6 further characterized in that said cathode layer contacting said electron injecting and transporting zone has a thickness of at least 50Å.
Claim 9
Dependent Claim
31 words
An internal junction organic electroluminescent device according to claim 7 further characterized in that said cathode layer contacting said electron injecting and transporting zone has a thickness of at least 100Å.
Claim 10
Dependent Claim
23 words
An internal junction organic electroluminescent device according to claim 1 further characterized in that said cathode layer contains at least 0.05 percent magnesium.
Claim 11
Dependent Claim
23 words
An internal junction organic electroluminescent device according to claim 9 further characterized in that said cathode layer contains at least 0.1 percent magnesium.
Claim 12
Dependent Claim
118 words
An internal junction organic electroluminescent device comprising in sequence, an anode, an organic hole injecting and transporting zone, an organic electron injecting and transporting zone forming a junction with the organic hole injecting and transporting zone, and a cathode comprised of a layer contacting the organic electron injecting and transporting zone containing a combination of magnesium and aluminum, characterized in that said electron injecting and transporting zone is comprised of a vacuum vapor deposited stilbene or chelated oxinoi layer and said cathode layer is deposited on said electron injecting and transporting zone layer in a thickness range of from 50 to 5000Å and is comprised of from 0.1 to 10 percent magnesium and at least 90 percent aluminum.
Claim 13
Dependent Claim
118 words
An internal junction organic electroluminescent device comprising in sequence, an anode, an organic hole injecting and transporting zone, an organic electron injecting and transporting zone forming a junction with the organic hole injecting and transporting zone, and a cathode comprised of a layer contacting the organic electron injecting and transporting zone containing a combination of magnesium and aluminum, characterized in that said electron injecting and transporting zone is comprised of a vacuum vapor deposited stilbene or chelated oxinoi layer and said cathode layer is deposited on said electron injecting and transporting zone layer in a thickness range of from 50 to 5000Å and is comprised of from 0.1 to 10 percent magnesium and at least 90 percent aluminum.
References Cited (Backward Citations)
US3530325A
Cited
US3621321A
Cited
US4356429A
Cited
US4539507A
Cited
US4720432A
Cited
US4885211A
Cited
US4769292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-21 | 1995-04-22 | 1995-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-21 | 1999-04-22 | 1999-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-21 | 2003-04-22 | 2003-10-22 | $7700.00 | Window Closed / Lapsed |