Polycyclic Emission Layer Compounds for Low-Voltage OLED Longevity

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Solution Overview

Problem

Existing organic electroluminescent elements face challenges in achieving low-driving voltage and long lifespan, necessitating improvements in materials for stable performance.

Innovation Solution

The development of a polycyclic compound represented by various chemical formulas, which can be incorporated into the emission layer of a light-emitting element to enhance luminous efficiency and extend the element's lifespan.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional organic electroluminescent materials are used, then the device can achieve basic light emission, but the luminous efficiency and lifespan are insufficient

Engineering Contradiction:

ImprovelifespanVSAvoidluminous efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent modifies the molecular structure parameters of organic electroluminescent materials by introducing specific polycyclic compound structures with defined ring systems and substituent groups (R1-R6, n1-n6), thereby optimizing both luminous efficiency and lifespan simultaneously through controlled structural parameter changes

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention develops composite organic electroluminescent materials combining polycyclic core structures with various substituent groups (amine, oxy, thio, alkyl, alkenyl, aryl, heteroaryl), creating composite molecular structures that achieve synergistic improvement in luminous efficiency and device lifespan

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If material composition is simplified for ease of manufacture, then manufacturing cost decreases, but performance stability deteriorates

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidperformance stability

Core Design Contradiction:

Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The patent establishes specific parameter ranges for molecular structure (n1: 0-3, n2: 0-4, n3: 0-5, n4: 0-5, n5: 0-6, n6: 0-6) and substituent types, providing clear design guidelines that balance structural complexity with manufacturability while ensuring performance stability through controlled parameter variations

Inventive Principle:

Principle #35Parameter changes

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 polycyclic compound improves the luminous efficiency and lifespan of the light-emitting element, resulting in improved display quality.

Implementation Method 1

holes and electrons respectively injected from a first electrode and a second electrode recombine in an emission layer, so that in the emission layer, an emission material that includes an organic compound emits light

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS20260007075A1Light-emitting element, polycyclic compound for the same, and electronic apparatus including the same

Publication Date: 2026.01.01 SAMSUNG DISPLAY CO LTD

AI summary

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