Carbazole compound, material for organic electroluminescence device and organic electroluminescence device
US-9203036-B2 · Dec 1, 2015 · US
Organic light-emitting diode with enhanced efficiency
US8933439B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8933439-B2 |
| Application number | US-201113577221-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 1, 2011 |
| Priority date | Feb 5, 2010 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
Generally, the devices provided herein comprise at least a hole-transport layer, two light-emitting layers, and an electron-transport layer, each having a highest occupied molecular orbital (HOMO) energy level and a lowest unoccupied molecular orbital (LUMO) energy level, wherein at least one of the HOMO energy levels and/or the LUMO energy levels of at least one of the light-emitting layers does not decrease in a stepwise fashion.
First claim
Opening claim text (preview).
What is claimed is: 1. An organic light-emitting device comprising: a cathode, an anode, and a series of organic layers disposed between the anode and the cathode, wherein the series of organic layers comprises: a first light-emitting layer deposited between the anode and the cathode, wherein the first light-emitting layer comprises a first host material and a first emissive material; a hole-transport layer, disposed between the anode and the first light-emitting layer; a sec…
Assignees
Inventors
Classifications
Electricity · mapped topic
Electricity · mapped topic
- H01L51/5016Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US8933439B2 cover?
- Generally, the devices provided herein comprise at least a hole-transport layer, two light-emitting layers, and an electron-transport layer, each having a highest occupied molecular orbital (HOMO) energy level and a lowest unoccupied molecular orbital (LUMO) energy level, wherein at least one of the HOMO energy levels and/or the LUMO energy levels of at least one of the light-emitting layers do…
- Who is the assignee on this patent?
- Ma Liping, Nitto Denko Corp
- What technology area does this patent fall under?
- Primary CPC classification H01L51/5016. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 13 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).