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Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh
Published on: June 23, 2017
Intrinsically stretchable bipolar host with crosslinkable trilayer architecture for high performance full-spectrum
Wenli Shi1, Xinxin Ban1, Tao Xu1
1School of Environmental and Chemical Engineering, Jiangsu Key Laboratory of Function Control Technology for Advanced Materials, Jiangsu Ocean University Lianyungang Jiangsu China banxx@jou.edu.cn aiyunzhu@jou.edu.cn.
This study introduces a novel cross-linkable trilayer film strategy for creating highly stretchable organic light-emitting diodes (OLEDs). The new materials enable high-efficiency, full-spectrum emission from small-molecule emitters in flexible devices.
Area of Science:
- Materials Science
- Organic Electronics
- Polymer Chemistry
Background:
- Integrating high-performance small-molecule organic emitters into stretchable organic light-emitting diode (OLED) platforms is challenging due to material limitations.
- Existing methods struggle with interlayer mixing and emitter migration in solution-processed stretchable devices.
Purpose of the Study:
- To develop intrinsically stretchable host and charge-transport materials for small-molecule OLEDs.
- To create a universal cross-linkable trilayer composite film strategy for enhanced mechanical and optoelectronic performance.
Main Methods:
- Synthesized intrinsically stretchable conjugated polymers (PUCBP, PU2CzSO, PUBMZ) with specific charge-transport functionalities.
- Developed a cross-linkable trilayer composite film strategy with in situ cross-linking and sandwich encapsulation.
- Fabricated and tested full-spectrum (blue, green, red) stretchable OLED devices.
Main Results:
- The trilayer films exhibited superior mechanical properties (27.91% elongation, 38.71 MPa tensile strength) compared to single-layer films.
- Achieved high external quantum efficiencies: 14.52% (blue), 17.32% (green), and 10.58% (red), exceeding single-layer devices by over 60%.
- Demonstrated excellent dynamic deformation stability, retaining 95% luminance after 100 bending cycles and 72% performance under 20% tensile strain.
Conclusions:
- The proposed trilayer composite film strategy enables the direct application of small-molecule emitters in stretchable OLEDs.
- This work provides a scalable platform for fabricating high-efficiency, intrinsically stretchable, full-spectrum materials.
- The developed materials offer exceptional mechanical robustness and optoelectronic performance for flexible electronics.
