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  4. Triboelectric‐TFT Flip‐Flop for Bistable Latching of Dielectric Elastomer Actuators
 
research article

Triboelectric‐TFT Flip‐Flop for Bistable Latching of Dielectric Elastomer Actuators

Marette, Alexis  
•
Haque, Rubaiyet Iftekharul  
•
Ji, Xiaobin  
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July 30, 2019
Advanced Electronic Materials

A high‐voltage flip‐flop combining two self‐powered soft sensors with a flexible high‐voltage thin film transistor (HVTFT) is reported, and is used to electrically latch dielectric elastomer actuators (DEAs) in zero and high‐strain states. Two touch‐actuated triboelectric generators (TENGs) provide the gate input for the HVTFT that drives a DEA. One TENG is of positive polarity, while the other is of negative polarity, thus generating voltages either higher (100 V) or lower (−6 V) than the HVTFT threshold voltage. Used in a high‐voltage inverter configuration, there are two stable output voltage states, here 650 V (the “reset” state) and 50 V (the “set” state). The DEA is thus latched in one of two states, at 17.5% and 0% strain. The 650 V output is stable in time, while the 50 V state drifts up to 350 V after 10 s. Due to the highly nonlinear strain–voltage curve of the DEA, the drift of the output voltage in the “set” state leads only to a 2% increase of the DEA actuation strain in 10 s. By enabling bistable control of DEAs with TENGs, the TENG‐HVTFT latch paves the way toward soft robots with flexible embedded control circuitry.

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Type
research article
DOI
10.1002/aelm.201900205
Author(s)
Marette, Alexis  
Haque, Rubaiyet Iftekharul  
Ji, Xiaobin  
Hinchet, Ronan  
Shea, Herbert R.  
Briand, Danick  
Date Issued

2019-07-30

Published in
Advanced Electronic Materials
Article Number

1900205

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMTS  
Available on Infoscience
August 19, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/159960
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