Condensed Cyclic Compound Emitter for OLED Lifespan
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Solution Overview
Problem
Existing organic light-emitting devices have limited lifespan due to degradation of materials over time, which affects their efficiency and reliability.
Innovation Solution
A light-emitting device is designed with a condensed cyclic compound that includes a protection coefficient for boron atoms, represented by Expression 1, ensuring effective protection and stability of the emitter, thereby enhancing the device's lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If conventional organic light-emitting materials are used, then the device can be manufactured with standard materials, but the lifespan is limited due to material degradation
Solution Approach 1:
The patent changes the chemical structure parameters of the emitter by incorporating boron atoms with specific protection coefficients (≥0.7) into the molecular structure. This structural parameter change enhances material stability and resistance to degradation, thereby extending device lifespan without compromising manufacturing feasibility
Solution Approach 2:
The patent employs composite material design by combining boron-containing compounds with specific protection coefficients with host materials in the emission layer. This composite approach creates a synergistic effect where the boron-protected emitter maintains structural integrity and chemical stability while functioning within the organic light-emitting device framework
2Ease of manufacture
If the emitter structure is simplified, then manufacturing becomes easier, but the protection against material degradation is reduced
Solution Approach 1:
The patent applies local quality enhancement by introducing boron atoms with specific protection coefficients at critical positions within the emitter molecular structure. Rather than complicating the entire emitter structure, the boron atoms are strategically placed to provide localized protection against degradation at vulnerable sites, maintaining overall structural simplicity while enhancing stability
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 use of the condensed cyclic compound with a high protection coefficient for boron atoms results in a significant improvement in the lifespan of the light-emitting device, maintaining high efficiency and reliability over time.
Implementation Method 1
The excitons transition from an excited state to a ground state, thereby generating light
Data Source
AI summary
A light-emitting device, an electronic apparatus including the light emitting device, and a condensed cyclic compound represented by Formula 1. The light-emitting device includes a first electrode, a second electrode facing the first electrode, and an interlayer arranged between the first electrode and the second electrode, the interlayer including an emission layer. The emission layer includes an emitter and one or more host(s) of number m1, m1 is an integer of 1 or more, and if m1 is 2 or more, two or more of the hosts are different from each other, the emitter and the host(s) m1 are different from each other, the emitter includes a condensed ring in which two or more monocyclic groups are condensed with each other, at least one of the monocyclic groups is a 6-membered ring including a boron atom, a nitrogen atom, and a carbon atom as ring-forming atoms, and at least one of the protection coefficient of the boron atom in the emitter is 0.7 or more. Formula 1 provided herein.