Electrodeposition and characterization of thermoelectric Bi₂Se₃ thin films

Xiao-long Li,Ke-feng Cai,Hui Li,Ling Wang,and Chi-wei Zhou Functional Materials Research Laboratory,Tongji University,Shanghai 200092,China

摘 要：Bi2Se3 thin films were electrochemically deposited on Ti and indium tin oxide-coated glass substrates,respectively,at room temperature,using Bi（NO3）3·5H2O and SeO2 as starting materials in diluted HNO 3 solution.A conventional three-electrode cell was used with a platinum sheet as a counter electrode,and a saturated calomel electrode was used as a reference electrode.The films were annealed in argon atmosphere.The influence of cold isostatic pressing before annealing on the microstructure and thermoelectric properties of the films was investigated.X-ray diffraction analysis indicates that the film grown on the indium tin oxide-coated glass substrate is pure rhombohedral Bi 2 Se 3,and the film grown on the Ti substrate consists of both rhombohedral and orthorhombic Bi 2 Se 3.

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