Flexible, High-Power Density, Wearable Thermoelectric Nanogenerator and Self-Powered Temperature Sensor
- 26 September 2019
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 11 (42), 38616-38624
- https://doi.org/10.1021/acsami.9b11435
Abstract
We propose a flexible and wearable thermoelectric nanogenerator (FTEG) made from Bi2Te3, which allows high voltage and output power density. The proposed FTEG works as a thermopile with the end-to-end connection of 126 thermoelectric legs, and which is fabricated through magnetron sputtering Cu conductor on PET film. Bi, Te, Sb and Se alloys are used to prepare thermoelectric materials by doping in a fixed proportion and zone melting, and nickel plating on the surface mitigates the deterioration of thermoelectric properties caused by the diffusion of Cu atoms or Cu+ ions. The thermoelectric figure of merit is stable and maintained above 0.7, up to 1.02. More flexibility is allowed by employing double sinusoidal serpentine connecting wires, and no significant property changes are observed even after being folded 200 times. When the temperature difference reaches 50K, the output voltage of the FTEG will be no less than 520mV, and the power density will reach 11.14mW·cm-2. By integrating a low-power, low-threshold voltage boost circuit on the back end of the FTEG, the electronic watch with a LCD screen can be easily powered to work properly. Furthermore, the FTEG is temperature-sensitive thus can be used for temperature measurement with a resolution of 0.5K. This work may have important prospects in flexible wearable physical sensors and individualized medical care.Keywords
Funding Information
- National Natural Science Foundation of China (81873912)
- Zhejiang Lab (2019MB0AE02)
This publication has 41 references indexed in Scilit:
- Biocompatible and totally disintegrable semiconducting polymer for ultrathin and ultralightweight transient electronicsProceedings of the National Academy of Sciences of the United States of America, 2017
- Flexible Light-Emitting Diodes Based on Vertical Nitride NanowiresNano Letters, 2015
- Flexible indium–gallium–zinc–oxide Schottky diode operating beyond 2.45 GHzNature Communications, 2015
- Self-powered fully-flexible light-emitting system enabled by flexible energy harvesterEnergy & Environmental Science, 2014
- Ultrathin, highly flexible and stretchable PLEDsNature Photonics, 2013
- Low‐Power Flexible Organic Light‐Emitting Diode Display DeviceAdvanced Materials, 2011
- Pseudo-CMOS: A Design Style for Low-Cost and Robust Flexible ElectronicsIEEE Transactions on Electron Devices, 2010
- Stretchable and Foldable Silicon Integrated CircuitsScience, 2008
- Room-temperature fabrication of transparent flexible thin-film transistors using amorphous oxide semiconductorsNature, 2004
- Thin-Film Transistor Fabricated in Single-Crystalline Transparent Oxide SemiconductorScience, 2003