Chrysene Compounds for Deep Blue Emission
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Solution Overview
Problem
There is a continuing need for electroluminescent compounds that emit blue light, as existing organic electroluminescent materials do not adequately achieve the desired color gamut for display applications.
Innovation Solution
The development of chrysene compounds with specific structural modifications, such as meta-substituted phenyl rings on amino nitrogens, which exhibit deep blue emission with color coordinates of x≦0.145 and y≦0.14, are used in the active layer of organic electronic devices to enhance light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing organic electroluminescent materials are used, then device structure and operation are simple, but color gamut and emission wavelength range are insufficient
Solution Approach 1:
The patent applies parameter changes by systematically modifying molecular parameters of chrysene compounds - specifically substituting at different positions (6,12 or 1,5) with various aryl groups (naphthyl, phenyl, carbazolyl) and adjusting substituent patterns to achieve different emission wavelengths and color coordinates, thereby expanding color gamut while maintaining manageable structural complexity
Solution Approach 2:
The patent employs composite material principles by creating chrysene compounds with multiple functional groups combined in specific configurations - merging electron-donating aryl groups with electron-withdrawing groups, and combining multiple substituents on the chrysene core to achieve desired optoelectronic properties and deep blue emission
2Illumination intensity
If blue-emitting compounds are developed to improve color gamut, then emission wavelength and color coordinates improve, but compound stability and lifetime may deteriorate
Solution Approach 1:
The patent applies local quality by placing specific functional groups at strategically chosen positions on the chrysene core - substituting aryl groups at 6,12-positions or 1,5-positions, and positioning electron-donating and electron-withdrawing groups to create localized electronic distributions that promote deep blue emission while maintaining overall molecular stability
Solution Approach 2:
The patent converts the potential harm of highly conjugated structures (which can reduce stability) into benefit by using the extended conjugation in chrysene derivatives to achieve deep blue emission, while compensating for stability concerns through careful selection of substituents and molecular architecture that prevent degradation pathways
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
These chrysene compounds demonstrate good lifetimes and deep blue light emission, effectively addressing the need for improved color gamut in display applications by forming films through liquid deposition techniques and exhibiting excellent photoluminescent properties.
Implementation Method 1
Organic electronic devices that emit light, such as light-emitting diodes... The organic active layer emits light through the light-transmitting electrical contact layer upon application of electricity across the electrical contact layers
Implementation Method 2
exhibiting excellent photoluminescent properties
Data Source
AI summary
This disclosure relates to chrysene compounds that are useful in electroluminescent applications. It also relates to electronic devices in which the active layer includes such a chrysene compound.