Flexible Display Substrate Single-Layer MoS2 ReS2 Injection
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Solution Overview
Problem
Conventional flexible displays with double-layer or multilayer electron and hole injection layers face low light emission efficiency due to electrons and holes being in different atomic layers, affecting electrical characteristics when the displays are twisted or stretched.
Innovation Solution
A flexible display substrate with a single-layered molybdenum disulfide electron injection layer and a single-layered rhenium disulfide hole injection layer, along with a single-layered molybdenum disulfide light-emitting layer, where the layers are closely bonded to ensure electrons and holes are in the same atomic layer, enhancing light emission efficiency and maintaining electrical and optical characteristics even when twisted or stretched.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If double-layer or multilayer materials with atomic layers stacked are used as electron injection layers and hole injection layers, then the flexibility of the display is improved, but the light emission efficiency deteriorates because electrons and holes are in different atomic layers
Solution Approach 1:
The patent merges the electron injection layer and hole injection layer into a single atomic layer structure where both electrons and holes coexist in the same layer, eliminating the separation issue in multilayer structures while maintaining flexibility
Solution Approach 2:
The patent transitions from a vertical stacking arrangement (multiple layers stacked in the z-dimension) to a planar arrangement (single layer in the x-y plane), allowing electrons and holes to interact more effectively within the same atomic layer
2Device complexity
If double-layer or multilayer materials are used for injection layers, then the device structure is more complex, but the electrical characteristics deteriorate when the display is twisted or stretched
Solution Approach 1:
The patent combines multiple functional layers into a single atomic layer that performs both electron injection and hole injection functions, reducing structural complexity and improving reliability under mechanical stress
Solution Approach 2:
The patent changes the structural parameter from multilayer stacking to single-layer configuration, which fundamentally alters the electrical characteristics and improves stability during twisting or stretching operations
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 configuration significantly improves light emission efficiency and maintains electrical and optical characteristics, allowing flexible displays to function effectively regardless of twisting or stretching, thereby broadening their application fields.
Implementation Method 1
a voltage is applied to an organic thin film to emit light... electrons and holes can successfully recombine in the light-emitting layer to form excitons and emit light
Data Source
AI summary
The present disclosure provides a flexible display substrate and a fabrication method thereof and a display device. The flexible display substrate includes a plurality of light-emitting units. The light-emitting units include an anode, a rhenium disulfide hole injection layer arranged on the anode, a light-emitting layer arranged on the rhenium disulfide hole injection layer, a single-layered molybdenum disulfide electron injection layer arranged on the light-emitting layer, and a cathode arranged on the molybdenum disulfide electron injection layer.