A novel design of thermoelectric hetero-nanocomposite films comprising well-aligned oriented (Bi,Sb)₂Te₃ (BST) nanocrystals and randomly dispersed diamond-like carbon (DLC) clusters has been realized for the first time using dual-beam pulsed laser co-deposition on SiO₂ insulated Si substrates. The simultaneously deposited DLC additives were found not only to successfully prevent the thermally induced rapid growth of BST for having consistent nanostructures across the whole BST:DLC film, but also to effectively reduce the thermal transport as qualitatively evidenced by micro-Raman characterizations. The significantly enhanced Seebeck coefficients up to 550 μV K⁻¹ and the corresponding power factor of ∼46 μW cm⁻¹ K⁻² revealed comparable to or higher than previously reported values for BST or BST-based nanocomposites, which evidently originated from the presence of multiple BST:DLC hetero-interfaces as clarified in the Pisarenko plot.

中文翻译：

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激光共烧碲化铋锑和类金刚石碳纳米复合材料可增强热电性能†

首次使用双光束脉冲激光实现了一种新颖的热电异质纳米复合膜设计，该膜包含取向良好的取向（Bi，Sb）₂ Te ₃（BST）纳米晶体和无规分散的类金刚石碳（DLC）团簇。共沉积在SiO ₂绝缘的Si衬底上。发现同时沉积的DLC添加剂不仅可以成功阻止BST热诱导的快速生长，因为其在整个BST：DLC膜中具有一致的纳米结构，而且可以有效地减少热传输，如通过微观拉曼表征所定性的。高达550μVK ^-1的塞贝克系数显着提高，相应的功率因数约为46μWcm ^-1K ^-2揭示了与BST或基于BST的纳米复合材料相当或高于以前报道的值，这显然是由Pisarenko图中阐明的多个BST：DLC异质界面的存在引起的。