文章信息/Info

Title:

Thermal Transport in Two-Dimensional Materials

作者:

張忠衛; 陳杰

同濟大學物理科學與工程學院 聲子學與熱能科學中心、高等研究院、 中歐納米聲子學聯合實驗室；上海市特殊人工微結構材料與技術重點實驗室

Author(s):

ZHANG Zhongwei;  CHEN Jie

Center for Phononics and Thermal Energy Science, Institute for Advanced Study, School of Physics Science and Engineering, Tongji University; China�睧U Joint Lab for Nanophononics, Tongji University; Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology

關鍵詞:

二維材料; 熱耗散; 熱傳導; 石墨烯; 尺寸效應

Keywords:

two-dimensional materials;  heat dissipation;  thermal transport;  graphene;  size effect

DOI:

10.7502/j.issn.1674-3962.2017.02.09

文獻標志碼:

A

摘要:

受到石墨烯的成功制備及其優異性質的影響，新型二維材料的探索和研究成為近年來的研究熱點，比如六角氮化硼、硅烯、黑磷以及過渡金屬硫化物等，這些材料同樣也展現出了優良的性質以及廣闊的應用前景， 比如在場效應管、光電器件以及清潔能源等領域。另一方面，隨著電子元器件的不斷小型化，器件中熱耗散問題成為制約其性能的關鍵問題，特別是在微納米尺度器件中，這使得對二維材料熱傳導性質的研究顯得尤為重要。針對幾種典型的二維材料，總結了熱傳導研究領域在理論計算以及實驗測量方面的最新進展。這些二維材料由于其多樣的結構特性和成鍵方式展現出各異的熱傳導性質，可從石墨烯中的高熱導率(2500~5000 Wm-1K-1)跨度到黑磷中較低的熱導率(9~30 Wm-1K-1)。此外，還特別分析了在二維材料中出現的一些獨特物理現象，比如尺寸效應、摻雜和表面吸附效應以及基底效應等。最后，對二維材料的一些功能化應用研究進行了概括。

Abstract:

The successful synthesis and unique properties of graphene attract extensive attentions in exploring two-dimensional (2D) materials, such as hexagonal boron nitride (h-BN), silicene, black phosphorus, and transition metal dichalcogenides (TMDCs), due to their promising applications in electronics, optoelectronics and clean energy. On the other hand, the heat dissipation and management have become crucial issues for limiting the device performances in the micro- and nano-electronics industry. This paper reviews the state-of-the-art research progresses on the thermal transport properties of 2D materials from both theoretical and experimental investigations. Originated from their different crystal structures and bonding interactions, diverse thermal transport abilities are revealed in these materials. For example, the thermal conductivity can range from a superior high value (2500~5000 Wm-1K-1) in graphene to a lower value (9~30 Wm-1K-1) in black phosphorus. Moreover, some physical factors affecting thermal transport are also discussed, including the size effect, defects and doping effects, as well as the substrate effect. The thermal conductivity of 2D materials exhibits unique size dependence that is completely different from that of bulk materials,in addition, the large surface and vibration mode in 2D materials make it more sensitive to the external perturbations, such as defect, doping, and substrate. Finally, some functional applications of 2D materials are also summarized, such as heat dissipation, thermal rectification and thermoelectric application.