Affiliation:
1. State Key Laboratory of Organic Electronics and Information Displays (SKLOEID), Institute of Advanced Materials (IAM) Nanjing University of Posts & Telecommunications Nanjing the People's Republic of China
2. Frontiers Science Center for Flexible Electronics (FSCFE), MIIT Key Laboratory of Flexible Electronics (KLoFE) Northwestern Polytechnical University Xi'an the People's Republic of China
Abstract
AbstractStretchable organic light‐emitting diodes (OLEDs) are important components for flexible/wearable electronics. However, the efficiency of the existing stretchable OLEDs is still much lower as compared with their rigid counterparts, one of the main reasons being the lack of ideal flexible transparent electrodes. Herein, we propose and develop a printed embedded metal composite electrode (PEMCE) strategy that enables the fabrication of ultra‐thin, highly flexible transparent electrodes with robust mechanical properties. With the flexible transparent electrodes serves as the anodes, flexible/stretchable white OLEDs have been successfully constructed, achieving a current efficiency of up to 77.4 cd A−1 and a maximum luminance of 34 787 cd m−2. The current efficiency of the resulting stretchable OLEDs is the highest ever reported for flexible/stretchable white OLEDs, which is about 1.2 times higher than that of the reference rigid devices based on ITO/glass electrodes. The excellent optoelectronic properties of the printed embedded transparent electrodes and the light extraction effect of the Ag‐mesh account for the significant increase in current efficiency. Remarkably, the electroluminescence performance still retains ~83% of the original luminance even after bending the device 2000 cycles at a radii of ~0.5 mm. More importantly, the device can withstand tensile strains of up to ~100%, and even mechanical deformation of 90% tensile strain does not result in a significant loss of electroluminescence performance with current efficiency and luminance maintained at over 85%. The results confirm that the PEMCE strategy is effective for constructing ultra‐flexible transparent electrodes, showing great promise for use in a variety of flexible/stretchable electronics.image
Funder
National Natural Science Foundation of China
Natural Science Foundation of Jiangsu Province
Six Talent Peaks Project in Jiangsu Province
Priority Academic Program Development of Jiangsu Higher Education Institutions
Subject
Materials Chemistry,Surfaces, Coatings and Films,Materials Science (miscellaneous),Electronic, Optical and Magnetic Materials
Cited by
11 articles.
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