Layered materials with intrinsically low thermal conductivity are promising candidates for thermoelectric waste heat to electrical energy conversion.Recently bulk form BiCuSeO,a layered oxychalcogenide,has drawn atten...Layered materials with intrinsically low thermal conductivity are promising candidates for thermoelectric waste heat to electrical energy conversion.Recently bulk form BiCuSeO,a layered oxychalcogenide,has drawn attention for thermoelectric applications.However,synthesis of a two dimensional nanosheet of BiCuSeO and study of its thermoelectric properties have not been explored yet.Here,we present a facile surfactant free low temperature solvothermal synthesis of few layered ultrathin BiCuSeO nanosheets for the first time.Nanosheets of BiCuSeO exhibit a semiconducting band gap of 0.9 eV and p-type conduction.A dense hot pressed pellet of BiCuSeO nanosheets exhibits a superior power factor and lower lattice thermal conductivity compared to that of the bulk sample in the temperature range of 300-723 K.展开更多
基金supported by SERB,DST(EMR/2016/000651)the New Chemistry Unit and the Sheikh Saqr Laboratory.
文摘Layered materials with intrinsically low thermal conductivity are promising candidates for thermoelectric waste heat to electrical energy conversion.Recently bulk form BiCuSeO,a layered oxychalcogenide,has drawn attention for thermoelectric applications.However,synthesis of a two dimensional nanosheet of BiCuSeO and study of its thermoelectric properties have not been explored yet.Here,we present a facile surfactant free low temperature solvothermal synthesis of few layered ultrathin BiCuSeO nanosheets for the first time.Nanosheets of BiCuSeO exhibit a semiconducting band gap of 0.9 eV and p-type conduction.A dense hot pressed pellet of BiCuSeO nanosheets exhibits a superior power factor and lower lattice thermal conductivity compared to that of the bulk sample in the temperature range of 300-723 K.
