Issue 28, 2015 - Breakthrough in the research of wearable fiber devices at Suzhou Institute of Nanotechnology

Recently, Li Qingwen's team at the Suzhou Institute of Nano of the Chinese Academy of Sciences has made new progress
in the research of flexible wearable devices.
They used flexible carbon nanotube fibers as conductive electrodes, and wrapped dense n-type TiO2 electron transport layer, mesoporous TiO2, perovskite (CH3NH3PbI3-xClx), P3HT/SWNT hole transport layer and Ag nanowires on the surface of the fiber by solution method, and then twisted with another carbon nanotube fiber to form a double helix structure, and finally the entire battery was packaged with transparent polymer, which greatly improved the stability
of the battery 。 Studies have shown that the efficiency of the battery can be as high as 3.
03%, the initial efficiency can still be maintained after 1000 bending times, and the stability in the air is greater than 96 hours
.
At the same time, the research group also wrapped a disordered graphene functional layer on the surface of the fiber, and cross-superimposed the functionalized carbon nanotube fibers with each other to prepare a non-volatile all-carbon memory memory prototype device
based on carbon nanotube fibers.
Under vacuum conditions, the switching ratio of the device can reach up to 109, the switching rate is less than 3 milliseconds, and the number of switching times is greater than 500 times
.

In addition, the research group has also worked together with Suzhou Jedi Nanotechnology Company to promote the engineering research of carbon nanotube fibers, and has made phased progress
.

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