Controlled growth of bismuth antimony telluride BixSb2−xTe3 nanoplatelets and their bulk thermoelectric nanocomposites
作者： Chaohua Zhang , Zeping Peng , Zhong Li , Ligen Yu , Khiam Aik Khor
DOI: 10.1016/J.NANOEN.2015.05.022
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摘要: Abstract Solution synthesis as a scalable bottom-up growth method shows considerable advantages for designing novel nanostructured bulk composites with augmented thermoelectric performance. Tuning the composition of synthesized materials in solution process is important adjusting carrier type and concentration. Here, we report modified solvothermal controlled BixSb2−xTe3 nanoplatelets, which can be sintered into pellets by using spark plasma sintering process. We further demonstrate tuning stoichiometric ternary nanoplatelets high crystallinity homogenous phase purity, proved X-ray diffraction Raman spectroscopy. The dependence performance p-type also systemically studied. optimized Bi0.5Sb1.5Te3 sample found to have ZT ~0.51 at 375 K, great potential improving this method. Considering progress n-type Bi–Te–Se composites, our results advocate promise bismuth/antimony chalcogenide nanocomposites towards practical applications.
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