Organic Light-Emitting Device with Benzochrysene Core Compounds

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Solution Overview

Problem

Current organic light-emitting devices face limitations in achieving high efficiency, low driving voltage, and long lifespan due to challenges in energy transfer and electric characteristics, particularly in synthesizing asymmetric amine derivatives with chrysene cores.

Innovation Solution

Incorporating a first compound with a benzochrysene core and a second compound selected from specific Formulae into the organic layer, facilitating energy transfer and enabling the synthesis of asymmetrically-structured amine derivatives, which are used in the emission layer to enhance electric and emission characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional organic light-emitting devices are used, then device structure is simple, but efficiency is low and lifespan is short

Engineering Contradiction:

Improvedevice efficiencyVSAvoidorganic layer structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent employs composite organic materials comprising specific compounds (Formula 1 and Formula 2) with defined molecular structures containing chrysene cores and asymmetric amine derivatives. These composite material structures enable simultaneous achievement of high efficiency, low driving voltage, and extended lifespan while maintaining manageable device complexity through systematic molecular design.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention introduces specific local structural features (chrysene core with asymmetric amine derivatives at particular positions) within the organic layer molecules. This local quality approach allows optimization of energy transfer and electric characteristics at specific molecular sites, achieving high efficiency and long lifespan without requiring complete restructuring of the entire device.

Inventive Principle:

Principle #3Local quality

2Illumination intensity

If high efficiency is achieved through energy transfer optimization, then luminance improves, but driving voltage increases

Engineering Contradiction:

ImproveluminanceVSAvoiddriving voltage

Core Design Contradiction:

Illumination intensityVSUse of energy by moving object

Solution Approach 1:

The patent systematically varies molecular parameters including substituent groups (R1-R14), core structures (chrysene derivatives), and molecular configurations (Formulas 1 and 2) to optimize the balance between luminance and driving voltage. By changing these chemical parameters, the invention achieves high luminance through efficient energy transfer while maintaining low driving voltage characteristics.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses model compound structures (Formula 1 and Formula 2) as templates for designing optimal organic layer materials. These copied structural patterns with specific chrysene core configurations and amine derivative arrangements enable reproduction of successful energy transfer and electric characteristic profiles across different device iterations.

Inventive Principle:

Principle #26Copying

3Manufacturing precision

If asymmetric amine derivatives with chrysene cores are synthesized, then color purity and efficiency improve, but manufacturing complexity increases

Engineering Contradiction:

Improvecolor purityVSAvoidsynthesis process

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent divides the complex asymmetric amine derivative molecules into separable structural components: the chrysene core (Formula 1) and the amine derivative substituents (Formula 2). This segmentation allows independent optimization and synthesis of each component, which can then be combined, thereby improving color purity while managing manufacturing complexity through modular synthesis approaches.

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 organic light-emitting device exhibits improved efficiency, low driving voltage, high luminance, and high color purity, with the ability to synthesize asymmetric amine derivatives, leading to enhanced performance and lifespan.

Implementation Method 1

Incorporating a first compound with a benzochrysene core and a second compound selected from specific Formulae into the organic layer, facilitating energy transfer

Methodology Applied

Scientific EffectEnergy transfer:

Implementation Method 2

Carriers, such as holes and electrons, recombine in the emission layer to produce excitons. When the excitons drop from an excited state to a ground state, light is emitted.

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS20230363260A1Organic light-emitting device

Publication Date: 2023.11.09 SAMSUNG DISPLAY CO LTD

AI summary

According to one or more embodiments, an organic light-emitting device includes: a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode. The organic layer includes an emission layer. The organic layer may include a first compound represented by Formula 1 and a second compound represented by one selected from Formulae 2-1 to 2-4: