Quantum dot light emitting diode and quantum dot light emitting display device including the same
US10944067B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2019 |
| Grant date | Mar 9, 2021 |
| Priority date | — |
| Expiry date | Nov 22, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/40
Abstract
A quantum dot light emitting diode comprises first and second electrodes facing each other; a hole injection layer disposed between the first electrode and the second electrode and having a first HOMO level; a first hole transporting layer disposed between the hole injection layer and the second electrode and having a second HOMO level that is lower than the first HOMO level; a second hole transporting layer disposed between the first hole transporting layer and the second electrode and having a third HOMO level that is lower than the second HOMO level; and a quantum dot light emitting layer disposed between the second hole transporting layer and the second electrode and having a fourth HOMO level that is lower than the third HOMO level, wherein a difference between the first HOMO level and the second HOMO level is greater than a difference between the second HOMO level and the third HOMO level and less than a difference between the third HOMO level and the fourth HOMO level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.