采用电化学沉积法在不锈钢衬底上制备了碲化铋(Bi2Te3)化合物热电薄膜,并利用XRD(X线衍射分析)、SEM(扫描电镜)和AFM(原子力显微镜)对薄膜进行物相分析和形貌观察.首先通过循环伏安法分别对Bi3+和HTeO2+以及他们共存的HNO3溶液进行了测试,确定了Bi2Te3的电化学生长为互诱导二元共沉积过程.然后在-50 mV电位,20 rmA.cm-2电流密度进行电沉积得到Bi2Te3多晶薄膜,XRD分析显示薄膜沿着(110)晶向存在一定程度的择优取向生长.进一步改变沉积电流密度发现,提高沉积电流密度使薄膜晶粒尺寸变小.
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