Light-emitting element, light-emitting apparatus, display apparatus, and electronic device
US8383250B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2010 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Apr 28, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K85/657
Abstract
A light-emitting element includes a cathode, an anode, a red-light-emitting layer that is disposed between the cathode and the anode and emits red light, a blue-light-emitting layer that is disposed between the red-light-emitting layer and the cathode and emits blue light, a green-light-emitting layer that is disposed between the blue-light-emitting layer and the cathode and emits green light, and an intermediate layer that is disposed between and in contact with the red-light-emitting layer and the blue-light-emitting layer and functions so as to control the transfer of positive holes and electrons between the red-light-emitting layer and the blue-light-emitting layer, wherein the intermediate layer contains a first material and a second material different from the first material, the red-light-emitting layer contains a material of the same type as the first material, and each of the blue-light-emitting layer and the green-light-emitting layer contains a material of the same type as the second material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.