LOW-DIMENSIONAL CHALCOGENIDE BASED THERMOELECTRIC COMPOSITES

By using the hydrothermal reflux method, a series of low-dimensional chalcogenide nanostructures were designed. On one hand, ternary metal (Bi, Cu, Ag, and Pb) chalcogenide nanowires with high thermoelectric figure of merit and power factors were obtained by using Te1-xSex alloys as templates. On the other hand, Bi2Se3, Bi2Te3, Sb2Te3 nanoplates and their derivatives were also successfully fabricated. After nanostructures were obtained, we further combine them with polymers such as polyvinylidene fluoride to guarantee their flexibility in thermoelectric devices. Here, the non-conductive polymer can not only guarantee the robustness and flexibility but also create a high trap-state by introducing the energy barrier at the organic/inorganic interface, thus a high level of Seebeck coefficient is maintained while a remarkable improvement on electrical conductivity was achieved. To our best knowledge, we are the first group developing the flexible and freestanding TE generators based on inorganic chalcogenides nanomaterials.

Grantor dc:publisher

Wake Forest University

Year dc:date.issued

2017

Author dc:creator

• DUN, CHAOCHAO

• CHALCOGENIDE

Language dc:language.iso

en

Handle dc:identifier.uri

http://hdl.handle.net/10339/82217

OAI identifier oai:identifier

oai:wakespace.lib.wfu.edu:10339/82217