Journal
ADVANCED MATERIALS
Volume 31, Issue 22, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201807516
Keywords
light-emitting diodes; perovskites; quantum-dots; stretchable electronics
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Funding
- Air Force Office of Scientific Research [FA9550-15-1-0340]
- National Robotic Initiative Program of the National Science Foundation [1638163]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1638163] Funding Source: National Science Foundation
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Stretchable light-emitting diodes (LEDs) and electroluminescent capacitors have been reported to potentially bring new opportunities to wearable electronics; however, these devices lack in efficiency and/or stretchability. Here, a stretchable organometal-halide-perovskite quantum-dot LED with both high efficiency and mechanical compliancy is demonstrated. The hybrid device employs an ultrathin (<3 mu m) LED structure conformed on a surface-wrinkled elastomer substrate. Its luminescent efficiency is up to 9.2 cd A(-1), which is 70% higher than a control diode fabricated on the rigid indium tin oxide/glass substrate. Mechanical deformations up to 50% tensile strain do not induce significant loss of the electroluminescent property. The device can survive 1000 stretch-release cycles of 20% tensile strain with small fluctuations in electroluminescent performance.
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