Journal
NANO LETTERS
Volume 13, Issue 11, Pages 5425-5430Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl403001r
Keywords
Thin film transistors; single-walled carbon nanotubes; organic photodiodes; electronic skin; bendable; imaging
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Funding
- NSF NASCENT Center
- Office of Science, Office of Basic Energy Sciences of the U.S. Department of Energy [DE-AC02-05CH11231]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [0847076] Funding Source: National Science Foundation
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We report visible light and X-ray imagers on lightweight and mechanically flexible plastic substrates. The process involves solution processing of organic photodetectors on top of an active-matrix backplane consisting of carbon nanotube thin-film transistors. The system takes advantage of the high mobility of nanotube transistors for low operating voltages and efficient light absorption of organic bulk-heterojunctions for high imaging sensitivity. With this highly scalable process scheme, 18 x 18 pixel-array flexible imagers (physical size of 2 cm x 1.5 cm) with high performance are successfully demonstrated. In addition, as the absorption peak of the adopted organic photodiodes covers the green band of the light spectrum, X-ray imaging is readily demonstrated by placing a scintillator film on top of the flexible imagers.
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