Light-emitting device and electronic apparatus including the same
US12324298B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2021 |
| Grant date | Jun 3, 2025 |
| Priority date | — |
| Expiry date | Feb 7, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/90
Abstract
A light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an interlayer disposed between the first electrode and the second electrode and having an emission layer, wherein the interlayer includes: i) a hole transport region disposed between the first electrode and the emission layer; and ii) an electron transport region disposed between the emission layer and the second electrode; wherein: the emission layer includes three or more hosts; the electron transport region includes a buffer layer; the three or more hosts include a hole transport host, a first electron transport host, and a second electron transport host; the buffer layer includes a third electron transport host; and a lowest unoccupied molecular orbital energy level of the second electron transport host is substantially equal to a lowest unoccupied molecular orbital energy level of the third electron transport host.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.