Two-dimensional (2D) thermoelectrics have shown enhanced performance compared to bulk thermoelectrics but cannot easily be improved through nanostructuring, since phonon-boundary-scattering becomes ineffective under confined dimensions. To overcome this issue, we introduce a one-dimensional (1D) texturing approach that efficiently suppresses phonon transport between grains of 2D thermoelectrics (TE). Uniaxial graphene wrinkles were utilized to separate high-quality, ultrathin Bi₂Se₃ films in a highly directional manner. The TE properties of these textured samples exhibit a strongly anisotropic characteristic with a maximum ZT of 1.03 at room temperature, which represents the highest reported value for Bi₂Se₃. The texturing approach provides a route for the enhancement of 2D thermoelectrics for future applications.

中文翻译：

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通过石墨烯的一维织构化增强二维Bi ₂ Se ₃的热电性能

二维（2D）热电器件与体热电器件相比已显示出增强的性能，但由于在有限的尺寸下声子边界散射变得无效，因此无法通过纳米结构轻松地进行改进。为克服此问题，我们引入了一种一维（1D）纹理化方法，该方法可有效抑制2D热电（TE）晶粒之间的声子传输。利用单轴石墨烯皱纹以高度定向的方式分离高质量的超薄Bi ₂ Se ₃薄膜。这些纹理化样品的TE特性表现出很强的各向异性，在室温下的最大ZT为1.03，这代表了Bi ₂ Se ₃的最高报道值。。纹理方法为将来的应用提供了增强2D热电学的途径。