Light-Emitting Device Interlayer for Lower Voltage and Longer Life
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Solution Overview
Problem
Existing light-emitting devices face challenges in achieving optimal driving voltage, luminescence efficiency, and lifespan while maintaining high display quality.
Innovation Solution
Incorporating a specific interlayer in the light-emitting device comprising a first compound and a second compound, represented by Formulas 1 and 2, which enhance the performance of the device by improving hole and electron transport regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional materials are used in the interlayer, then the device structure is simple, but the driving voltage is high and luminescence efficiency is low
Solution Approach 1:
The interlayer is constructed using a composite material system comprising a host compound and a guest compound with specific molecular structures (Formula 1 and Formula 2). This composite approach enables simultaneous optimization of electrical and optical properties, achieving low driving voltage and high luminescence efficiency that cannot be attained with conventional single materials.
Solution Approach 2:
The patent employs parameter changes by carefully selecting and adjusting molecular structures of the host and guest compounds, including specific functional groups, ring structures, and substituent patterns. These structural parameter variations optimize charge transport and energy transfer characteristics, resulting in improved driving voltage and luminescence efficiency.
2Ease of manufacture
If conventional materials are used in the interlayer, then the manufacturing process is simple, but the luminescence efficiency is low
Solution Approach 1:
The composite interlayer system with host-guest compound configuration enables efficient energy transfer and luminescence while maintaining compatibility with existing manufacturing processes. The specific molecular designs (Formula 1 and Formula 2) facilitate effective charge injection and recombination, achieving high luminescence efficiency without requiring complex fabrication steps.
Solution Approach 2:
The host compound acts as an intermediary between the electrodes and the guest compound, facilitating efficient charge transport and energy transfer. This intermediary role enables optimized luminescence efficiency while maintaining a relatively simple manufacturing process, as the host-guest system can be deposited using conventional vacuum deposition techniques.
3Duration of action of stationary object
If standard interlayer materials are used, then the device lifespan is limited, but the device structure remains simple
Solution Approach 1:
The composite interlayer comprising specifically designed host and guest compounds (Formula 1 and Formula 2) provides enhanced device lifespan through improved material stability and reduced degradation mechanisms. The molecular structures are optimized for long-term operational stability while maintaining structural clarity and ease of identification.
Solution Approach 2:
The patent employs organic compounds with tailored molecular structures that offer improved stability and lifespan compared to conventional materials. These materials are designed to resist degradation from electrical stress, thermal effects, and environmental factors, extending device operational life without requiring overly complex structural arrangements.
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 solution results in improved driving voltage, luminescence efficiency, and extended lifespan, thereby enhancing the overall display quality of the light-emitting device.
Implementation Method 1
which enhance the performance of the device by improving hole and electron transport regions
Implementation Method 2
Carriers, such as holes and electrons, may recombine in the emission layer to produce excitons. If (e.g., when) the excitons drop from an excited state to a ground state, light may be generated.
Data Source
AI summary
A light-emitting device is disclosed. The light-emitting device may include a first electrode, a second electrode that may face the first electrode, and an interlayer that may be arranged between the first electrode and the second electrode and that may include an emission layer. The interlayer may include a first compound represented by Formula 1 and a second compound represented by Formula 2: