Light emitting device and light emitting display apparatus including the same

By employing an electron transport stack structure in the light-emitting device and adjusting the LUMO energy level of the material to reduce the interface energy barrier, the problems of reduced electron transport efficiency and lifetime are solved, resulting in a more efficient and longer-lasting light-emitting device.

CN122161289APending Publication Date: 2026-06-05LG DISPLAY CO LTD
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LG DISPLAY CO LTD
Filing Date
2025-10-22
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

In existing light-emitting devices, the energy barrier when electrons travel from adjacent functional layers through electron transport layers to the light-emitting layer leads to reduced efficiency, and electron accumulation leads to reduced lifetime, especially in multiple light-emitting stacks.

Method used

An electron transport stack structure is adopted, which includes a first material layer adjacent to the first light-emitting layer and a second material layer adjacent to the n-type charge generation layer, with a combination layer between the two. By adjusting the LUMO energy level, the interface energy barrier is reduced, the electron transport efficiency is improved and the accumulation is prevented.

Benefits of technology

It improves the efficiency and lifespan of light-emitting devices, reduces driving voltage, and improves electron injection characteristics.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122161289A_ABST
    Figure CN122161289A_ABST
Patent Text Reader

Abstract

Disclosed are a light-emitting device and a light-emitting display apparatus including the same. The light-emitting device includes a first electrode and a second electrode facing each other, and a first light-emitting layer, an electron transport stack, and a charge generation layer disposed between the first electrode and the second electrode, wherein the electron transport stack includes a first material layer adjacent to the first light-emitting layer and including a single first material, a second material layer adjacent to the charge generation layer and including a single second material different from the first material, and a combined layer of the first material and the second material between the first material layer and the second material layer.
Need to check novelty before this filing date? Find Prior Art