Journal
ACS NANO
Volume 10, Issue 8, Pages 8078-8086Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.6b04201
Keywords
transparent and flexible; self-charging; energy storage; energy harvesting; biometrics
Categories
Funding
- thousands talents program for pioneer researcher and his innovation team, China
- National Natural Science Foundation of China [51432005, 5151101243, 51561145021, 61504009, 21403181]
- Beijing Natural Science Foundation of China [4141002]
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Portable and wearable personal electronics and smart security systems are accelerating the development of transparent, flexible, and thin-film electronic devices. Here, we report a transparent and flexible self charging power film (SCPF) that functions either as a power generator integrated with an energy storage unit or as a self-powered information input matrix. The SCPF possesses the capability of harvesting mechanical energy from finger motions, based on the coupling between the contact electrification and electrostatic induction effects, and meanwhile storing the generated energy. Under the fast finger sliding, the film can be charged from 0 to 2.5 V within 2094 s and discharge at 1 mu A for approximately 1630 s. Furthermore, the film is able to identify personal characteristics during a sliding motion by recording the electric signals related to the person's individual bioelectricity, applied pressing force, sliding speed, and so on, which shows its potential applications in security systems in touchpad technology.
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