Organic light-emitting element

By structuring the organic light-emitting device with specific organic compounds and common materials for electron and hole injection layers, the device achieves improved electron and hole injection, resulting in enhanced efficiency and durability.

JP2025136118APending Publication Date: 2025-09-19CANON KK
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Patent Information

Application Number
JP2024034331
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-03-06
Publication Date
2025-09-19

AI Technical Summary

Technical Problem

Stacked organic light-emitting devices face issues with charge generation layers deteriorating easily, leading to higher voltages, lower efficiency, and reduced durability due to inadequate consideration of electron injection properties and carrier balance.

Method used

The organic light-emitting device is structured with specific organic compounds in the first and second light-emitting units, ensuring that the LUMO level difference satisfies ΔLUMO1≧0, and optionally with common materials for electron and hole injection layers, to improve electron and hole injection properties, reducing driving voltage and enhancing durability.

Benefits of technology

This configuration results in a highly efficient and durable organic light-emitting device with improved electron and hole injection, leading to enhanced luminous efficiency and prolonged device life.

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Abstract

To provide an organic light-emitting element having high efficiency and excellent durability.SOLUTION: The element sequentially includes a first electrode 200, a first light-emitting unit 300, a charge generation layer 400, a second light-emitting unit 500, and a second electrode 600. The first light-emitting unit 300 sequentially includes a first organic layer 303, a first light-emitting layer 304, and a second organic layer 305, which are arranged adjacent to each other, and the first light-emitting unit 300 exhibits hole-injecting properties.SELECTED DRAWING: Figure 1
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