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A Novel Approach to Synthesize Lanthanum Telluride Thermoelectric Thin Films in Ambient Conditions

机译:在环境条件下合成碲化镧热电薄膜的新方法

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Rare-earth telluride compounds are characterized by their high performance thermoelectric properties that have been applied to the development of functional materials . Recently, May and co-workers reported that nanostructured bulk lanthanum telluride (La_(3-x)Te_4, 0 ≤ x ≤ 1/3) by mechanical ball-milling exceeded the figure of merit (ZT) of 1 at high temperatures near 1300K . Since the increased thermoelectric efficiency of nanostructured materials is due to the enhancement of phonon scattering introduced by quantum confinement, thin films have also generated significant scientific and technological interest . Here, we report on the electrodepostion of lanthanum telluride and lanthanum thin films in ionic liquids in ambient conditions. Surface morphologies varied from needle-like to granular structures and depend on deposition conditions. This novel electrochemical synthesis approach is a simple, inexpensive and laboratory-environment friendly method of synthesizing nanostructured thermoelectric materials.
机译:稀土碲化物化合物的特征在于其高性能的热电性能,这些热电性能已应用于功能材料的开发。最近,May和他的同事报道说,在1300K附近的高温下,通过机械球磨工艺制备的纳米结构体碲化镧(La_(3-x)Te_4,0≤x≤1/3)超过了品质因数(ZT)1。 。由于纳米结构材料热电效率的提高是由于量子限制引入的声子散射的增强,因此薄膜也引起了极大的科学技术兴趣。在这里,我们报道了在环境条件下离子液体中碲化镧和镧薄膜的电沉积。表面形态从针状到颗粒状不等,并取决于沉积条件。这种新颖的电化学合成方法是一种简单,廉价且对实验室环境友好的合成纳米结构热电材料的方法。

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