期刊
MATERIALS RESEARCH BULLETIN
卷 145, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2021.111517
关键词
Composites; Chalchogenides; Semiconductivity; X-ray diffraction; Thermoelectrics
资金
- Manipal Academy of Higher Education
- DST - FIST [PS-1/2017/8]
- UGC-DAE CSR, Mumbai [UDCSR/MUM/AO/CRS-M-314/2020/812]
The thermoelectric properties of co-doped (Bi0.98In0.02)(2)Te2.7Se0.3/reduced graphene oxide composites were studied, showing that the addition of reduced graphene oxide can significantly reduce thermal conductivity and electrical resistivity while enhancing the power factor.
The thermoelectric properties of co-doped (Bi0.98In0.02)(2)Te2.7Se0.3/reduced graphene oxide composites between 10 - 325 K are presented. X-ray diffraction confirms that the composites adopt a rhombohedral structure with space group R (3) over barm. Field emission scanning electron microscopy reveals an interface structure of reduced graphene oxide (rGO). N-type conducting behaviour is observed for all the samples, as ascertained by Hall effect and Seebeck coefficient measurements, with a carrier concentration of 10(25)/m(3). The thermal conductivity and electrical resistivity of (Bi0.98In0.02)(2)Te2.7Se0.3/0.02 wt% reduced graphene oxide composite is found to decrease by 1.6 and 10 times respectively in comparison with that of (Bi0.98In0.02)(2)Te2.7Se0.3. The power factor is enhanced by 7 times for (Bi0.98In0.02)(2)Te2.7Se0.3/0.01 wt% rGO compared to that of (Bi0.98In0.02)(2)Te2.7Se0.3.
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