Light Emitting Panel Interface Layer for Balanced Carrier Injection
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Solution Overview
Problem
Existing light emitting panels face challenges with unbalanced carrier injection due to mismatched work functions between electrode layers and light emitting layers, leading to inefficient performance.
Innovation Solution
The introduction of an interfacial modification layer with a polycyclic structure and electriferous groups, which adjusts the work function of electrode layers by creating a dipole moment, thereby balancing carrier injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If electrode layers are directly contacted with light emitting layer, then device structure is simple, but carrier injection is unbalanced due to work function mismatch
Solution Approach 1:
The patent introduces an interfacial modification layer as an intermediary between the electrode layer and light emitting layer. This layer contains dipole moments that adjust the work function of the electrode, enabling balanced carrier injection without significantly increasing device complexity. The modification layer acts as a mediator that resolves the work function mismatch problem.
Solution Approach 2:
The patent modifies the work function parameter of the electrode layer by introducing an interfacial modification layer with specific dipole moments. This parameter change enables the electrode to achieve better energy level alignment with the light emitting layer, solving the carrier injection balance issue while maintaining relatively simple device structure.
2Reliability
If interfacial modification layer is added to adjust work function, then carrier injection balance is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality modification by introducing an interfacial modification layer only at the critical interface between electrode and light emitting layer, rather than modifying the entire device structure. This localized approach improves carrier injection balance while minimizing the increase in overall device complexity.
Solution Approach 2:
The interfacial modification layer is constructed as a composite structure containing molecules with specific dipole moments. This composite material approach enables precise work function adjustment through molecular design, achieving improved carrier injection balance with controlled device complexity.
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
This solution effectively adjusts the work function of electrode layers, improving the balance of carrier injection and enhancing the overall performance of light emitting panels.
Implementation Method 1
the interfacial modification layer includes a polycyclic structure, a first electriferous group connected to a side of the polycyclic structure facing away from the light emitting layer, and a second electriferous group connected to a side of the polycyclic structure facing the light emitting layer; and charges of the first electriferous group and the second electriferous group are different, so that the interfacial modification layer has a dipole moment, and therefore a work function of the electrode layers in contact with the interfacial modification layer is adjusted
Data Source
AI summary
Disclosed are a light emitting panel, a display apparatus, and a method for manufacturing the light emitting panel. The light emitting panel includes: a substrate, at least two electrode layers arranged on one side of the substrate, a light emitting layer between the electrode layers. An interfacial modification layer is arranged on one side of at least one of the electrode layers facing the light emitting layer. The interfacial modification layer includes: a polycyclic structure, a first electriferous group connected to a side of the polycyclic structure away from the light emitting layer, a second electriferous group connected to a side of the polycyclic structure facing the light emitting layer. Charges of the first and second electriferous group are different, so that the interfacial modification layer has a dipole moment, therefore a work function of the electrode layers in contact with the interfacial modification layer is adjusted.