Adamantyl Fluorene Triazine Compound for OLED Driving Voltage

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Solution Overview

Problem

Existing organic electroluminescent devices face issues with increased driving voltage, decreased luminous efficiency, and shortened lifetime, particularly at high temperatures, which affect their performance.

Innovation Solution

An organic compound with a 2,4-diphenyl-1,3,5-triazine electron injection and transport group, combined with an adamantane-fluorenyl core, is introduced to enhance electron injection and transport, improve photoelectric conversion efficiency, and increase the glass-transition temperature, thereby stabilizing the material and extending the device's lifetime.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional organic electroluminescent materials are used, then the device can operate, but the driving voltage increases and luminous efficiency decreases at high temperature

Engineering Contradiction:

Improvedevice performance stabilityVSAvoiddriving voltage

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent modifies the molecular structure parameters of organic electroluminescent materials by introducing specific functional groups (triarylamine, carbazole, indole, indazole, oxadiazole, triazole, pyrimidine, pyridine) and adjusting their combinations to optimize electron-hole recombination efficiency and reduce driving voltage while maintaining high-temperature stability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates composite organic materials by combining multiple functional groups and aromatic ring structures (phenyl, naphthyl, anthryl, pyridyl, etc.) in specific ratios and configurations to achieve synergistic effects that improve both electrical performance and thermal stability

Inventive Principle:

Principle #40Composite materials

2Reliability

If conventional organic electroluminescent materials are used, then the device can operate, but the luminous efficiency decreases at high temperature

Engineering Contradiction:

Improveluminous efficiencyVSAvoidoperating temperature

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The patent changes the molecular weight, glass transition temperature, and thermal decomposition temperature parameters of the organic materials through strategic selection of aromatic ring structures and functional groups, enabling efficient operation at elevated temperatures without efficiency loss

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent designs organic materials with inherent thermal stability through molecular structure optimization, replacing materials that degrade at high temperatures with those that maintain their electroluminescent properties, effectively creating thermally robust components

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Reliability

If conventional organic electroluminescent materials are used, then the device can operate, but the lifetime is shortened

Engineering Contradiction:

Improvedevice lifetimeVSAvoidoperational lifetime

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent optimizes the thermal stability parameters (glass transition temperature, decomposition temperature) and electrochemical stability of organic materials through molecular structure design, directly extending the operational lifetime by preventing material degradation

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent incorporates thermally stable functional groups and robust molecular structures that preemptively resist high-temperature degradation, oxidation, and other degradation mechanisms before they can occur during device operation, thereby extending lifetime

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 compound reduces driving voltage, enhances efficiency, and improves thermal and electrochemical stability, leading to longer device lifetime and better performance in organic electroluminescent devices.

Implementation Method 1

uses 2,4-diphenyl-1,3,5-triazine as the electron injection and transport group

Methodology Applied

Scientific EffectElectron transport: Conduction (electrical)

Implementation Method 2

the adamantane-fluorenyl group has a high molecular weight and steric-hinderance effect, which may effectively increase the glass-transition temperature of the material

Methodology Applied

Scientific EffectGlass transition:

Implementation Method 3

electrons and the holes combine with each other to form excitons, and the excitons are in an excited state to release energy to the outside, thereby emitting light

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS11495748B2Organic compound having adamantyl fluorene ligands on 1,3,5-triazine and electronic device

Publication Date: 2022.11.08 SHAANXI LIGHTE OPTOELECTRONICS MATERIAL CO LTD

AI summary

The present disclosure provides an organic compound and an electronic device containing the organic compound, which relates to the technical field of organic materials. The structure of the organic compound is as shown in the following Chemical formula (1), where Y has a structure as shown in the following formula (2) or (3). The organic compound is used in, for example, an electronic device of an organic electroluminescent device, and can improve the lifetime property and deficiency property, electrochemical stability and thermal stability, and reduce the driving voltage of the organic electroluminescent device.