Fiber optoelectronic devices with spirally wrapped CNT microelectrodes beyond geometrical limitations for wearable e-textile applications
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초록
내용
A spirally wrapped carbon nanotube(CNT) microelectrodes are demonstrated for high-performance fiber optoelectronic devices. An inkjet-printed CNT microelectrodes with desired microstructure on an agarose hydrogel is conformally transferred to functional microfiber surface without morphological damage. A fiber organic field-effect transistor with CNT microelectrodes verifies the compatibility of the rolling-transferred CNT microelectrodes by evaluating the interfacial properties. Furthermore, a fiber organic photodiode (OPD) fabricated using spirally wrapped CNT microelectrodes as a transparent electrode and a bulk heterojunction (BHJ) layer exhibits good photo-sensitivity and stable durability in bending. As a proof of concept, photoplethysmogram (PPG) measurements are demonstrated using the fiber OPD embedded into a textile. This work offers a novel strategy to control the channel dimension and verifies the feasibility of fiber optoelectronic device for use in e-textile applications.