Polycyclic Light-Emitting Layer Materials for OLED Lifespan and Efficiency

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Solution Overview

Problem

Existing organic electroluminescence display devices face challenges in achieving high luminous efficiency and long lifespan for their light-emitting materials.

Innovation Solution

Incorporation of a polycyclic compound represented by specific formulas, such as Formula 1, 2, and 3, in the light-emitting layer of the light-emitting element, which includes a first electrode and a second electrode, to enhance luminous efficiency and lifespan.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional organic compounds are used in the light-emitting layer, then the device structure and manufacturing process remain simple, but the luminous efficiency and lifespan are insufficient

Engineering Contradiction:

ImprovelifespanVSAvoidcompound structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent modifies the molecular parameters of organic compounds by introducing specific structural features (spirobifluorene core, dibenzofuran/dibenzothiophene units, carbazole groups) to achieve improved luminous efficiency and lifespan while maintaining reasonable device complexity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite organic compound structures that combine multiple functional units (fluorene, carbazole, dibenzofuran) within a single molecule to achieve synergistic effects that improve both luminous efficiency and material lifespan

Inventive Principle:

Principle #40Composite materials

2Productivity

If conventional organic compounds are used in the light-emitting layer, then the manufacturing process remains simple, but the luminous efficiency is insufficient

Engineering Contradiction:

Improveluminous efficiencyVSAvoidcompound structure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent optimizes molecular parameters including HOMO-LUMO energy levels, carrier mobility, and molecular packing density through strategic structural design to enhance luminous efficiency while controlling the complexity of synthesis procedures

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent divides the light-emitting compound into distinct functional segments (electron-transporting carbazole units, hole-transporting dibenzofuran units, rigid spirobifluorene core) that can be independently optimized and then assembled to achieve high luminous efficiency

Inventive Principle:

Principle #1Segmentation

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The use of these polycyclic compounds improves the luminous efficiency and extends the lifespan of the light-emitting elements, resulting in better display quality.

Implementation Method 1

a light-emitting material that includes an organic compound emits light to achieve display

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS20260007074A1Light-emitting element, polycyclic compound for the same, and display device including the light-emitting element

Publication Date: 2026.01.01 SAMSUNG DISPLAY CO LTD

AI summary

Embodiments provide a polycyclic compound, a light-emitting element that includes the polycyclic compound, and a display device that includes the light-emitting element. The light-emitting element includes a first electrode, a second electrode disposed on the first electrode, and a light-emitting layer disposed between the first electrode and the second electrode, wherein the light-emitting layer includes the polycyclic compound. The polycyclic compound represented by Formula 1, which is explained in the specification.