| Summary: | 碩士 === 東海大學 === 電機工程學系 === 102 === In this study we used the unique method of dispersion and filtration to prepare the multi-walled carbon nanotubes (MWCNT) networks, with random arrangements called buckypaper (Random buckypaper, referred as RBP). Here we establish the concept of Seebeck effect to set up and to generate the thermoelectric output. To test the buckpaper under the influence of the enhanced thermoelectric effect, we doped the thermoelectric metal alloy of BixTey nanoparticles to obtain the efficient generation of thermal current. Powder X-ray diffraction (XRD) measurements and SEM analysis were performed to confirm the synthesised product of metal alloy and the morphology of RBP-BixTey respectively. In addition to the thermoelectric effect, we introduced the concept of the photoelectric effect by the illumination of visible light the measurement and measured of the output thermal voltage and photovoltage together.
We observed the value of thermal voltage for pure RBP is 4.9 mV and in the case of photovoltage it is 42.1 μV. The combined measurements were carried out simultaneously to obtain the maximum output of 5.07 mV for thermo-photo voltage. After the incorporation 50% weight percentage concentration of BixTey alloy into the buckypaper, we observed increase in the thermal voltage upto the maximum of 5.27 mV, the higher photovoltage value of 52.1 μV, and the combination gives increased in the output value to the maximum of 5.57 mV. From the observed experimental results, the optimized condition for doping of metals and their alloys into the RBP for the better production of combined thermal and photo reaction of MWCNTs in the networks was exposed. In this approach, we can create the ability to demonstrate the potential of fabricating flexible CNT based nanocomposites to improve the efficiency of solar energy harvesting technology.
Keyword: MWCNT, Buckypaper, Doping, Thermoelectric, Photoelectric.
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