期刊
IEEE SENSORS JOURNAL
卷 20, 期 13, 页码 6856-6862出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2019.2938605
关键词
Permittivity; Substrates; Electrodes; Integrated circuit modeling; Sensors; Capacitance; Short-circuit currents; Triboelectric nanogenerator; self-powered sensors; simulation; permittivity; dielectric
资金
- Engineering and Physical Sciences Research Council (EPSRC) Engineering Fellowship for Growth [EP/M002527/1, EP/R029644/1]
- EPSRC [EP/M002527/1, EP/R029644/1] Funding Source: UKRI
With electrical power generated from mechanical contact, triboelectric nanogenerators (TENGs) offer a promising route to realizing self-powered sensors. For effective usage, it is important to improve their limited power range (0.1-100 mW/cm(2)) and this can be achieved by optimizing the output performance. Among the factors that confer higher performance are materials with a strong triboelectric effect together with low permittivity, but it is challenging to optimize both within a single material. This paper presents a solution to this challenge by optimizing a low permittivity substrate beneath the tribo-contact layer. Results are simulated over a range of substrate permittivities. The open circuit voltage is found to increase by a factor of 1.6 in moving from PVDF to the lower permittivity PTFE. Two TENG devices have been fabricated with 100 mu m PET and PTFE substrates to compare performance. The experiments confirm that lowering the substrate dielectric constant (i.e. PET to PTFE) raises the open circuit voltage in line with simulation predictions.
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