Organic Compound Red Light Emission Quantum Yield
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Solution Overview
Problem
Existing organic light emitting devices do not achieve high quantum yield and efficient light emission in the red region, with compounds like those in PTL 1 and PTL 2 failing to emit light effectively.
Innovation Solution
An organic compound with a specific basic skeleton represented by Formula (1), where R1 to R22 are selected from various groups, is developed to enhance light emission efficiency and purity in the red region, synthesized using acenaphthenequinone, dibenzylketone, fluoranthene, and naphthalene derivatives, and incorporated into the light emitting device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional organic compounds (PTL 1, PTL 2) are used in organic light emitting devices, then the device structure is simple and manufacturing is easier, but the quantum yield is low and light emission efficiency is poor
Solution Approach 1:
The patent changes the chemical structure parameters of the organic compound by introducing a specific basic skeleton with fused ring structures (Formula 1). This structural parameter change results in improved quantum yield and light emission efficiency in the red region, while maintaining compatibility with existing device manufacturing processes
Solution Approach 2:
The patent creates a composite molecular structure by combining multiple ring systems (acenaphthenequinone, dibenzylketone, fluoranthene, and naphthalene derivatives) into a single integrated basic skeleton. This composite structure achieves high quantum yield and efficient red light emission while remaining manufacturable using standard organic EL device fabrication techniques
2Device complexity
If conventional organic compounds are used, then the device complexity is low, but the color purity and quantum yield in the red region are insufficient
Solution Approach 1:
The patent modifies the molecular structure parameters by designing a specific basic skeleton (Formula 1) with fused ring systems that inherently provide high color purity in the red region. This structural parameter change achieves precise color control without increasing device structural complexity
Solution Approach 2:
The patent applies local quality by designing specific functional groups and substituents (R1 to R22) at particular positions within the basic skeleton to optimize red light emission and color purity. The localized structural features enable precise control over optical properties while maintaining overall device simplicity
3Use of energy by moving object
If conventional compounds are used, then power consumption is higher, but the quantum yield remains low
Solution Approach 1:
The patent changes the energy conversion parameters by introducing a basic skeleton (Formula 1) with optimized HOMO-LUMO energy levels and improved charge carrier mobility. This parameter optimization enhances quantum yield, reducing energy loss and thereby lowering power consumption in organic light emitting devices
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 compound achieves high quantum yield and red light emission with high color purity, improving luminous efficiency and reducing power consumption in organic light emitting devices.
Implementation Method 1
By injecting electrons and holes from the pair of electrodes, an exciton of a luminescent organic compound in the organic compound layer is generated. Then, when the exciton returns to the ground state, the organic light emitting device emits light.
Data Source
Figure 1
AI summary
To provide a novel organic compound suitable for an organic light emitting device. This invention provides an organic compound having the skeleton represented by Formula ( 1 ).