Organic electroluminescent device and use thereof

By using non-alkali metal n-type dopants in OLED devices to coordinate and activate the electron transport layer and interface modification layer with organic electron transport materials, the problems of driving voltage rise and light emission crosstalk caused by optical microcavity modulation were solved, and high power efficiency and long lifespan OLED devices were realized.

CN122373613APending Publication Date: 2026-07-10JIHUA LAB
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIHUA LAB
Filing Date
2026-06-05
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing OLED devices suffer from increased driving voltage when adjusting the optical microcavity, leading to decreased power efficiency and emission crosstalk, which are difficult to solve simultaneously using traditional methods.

Method used

A coordination-activated electron transport layer composed of a non-alkali metal n-type dopant and an organic electron transport material is used as the optical microcavity control layer. An interface modification layer is introduced between the first coordination-activated electron transport layer and the hole injection layer to solve the energy level mismatch problem and optimize the electron transport efficiency.

Benefits of technology

The driving voltage was reduced, power efficiency was improved, light emission crosstalk caused by lateral current leakage was suppressed, device life was extended, and efficient and stable optical microcavity control was achieved.

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Abstract

This invention relates to the field of electroluminescence technology and discloses an organic electroluminescent device and its application. The organic electroluminescent device includes, from bottom to top, an anode layer, a first coordination-activated electron transport layer, an interface modification layer, a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, a second coordination-activated electron transport layer, an electron injection layer, and a cathode layer. The coordination-activated electron transport layer is composed of a non-alkali metal n-type dopant and an organic electron transport material, wherein the organic electron transport material is composed of a nitrogen-containing heterocyclic chelate ligand without lone pair electron-emitting unit modification. The coordination-activated electron transport layer of this invention possesses high conductivity and the function of controlling the optical microcavity of the device. During optical microcavity control, it does not significantly increase the device driving voltage, avoids pixel crosstalk caused by lateral current leakage, and works synergistically with the interface modification layer and the hole injection layer to solve the heterojunction interface energy level mismatch, thereby improving device lifetime and voltage stability.
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Citation Information

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