氮化镓/石墨烯/金刚石异质界面热输运调控研究

刘东静; 王鹏博; 胡志亮; 陆佳琪; 肖煜; 黄家强

doi:10.7498/aps.74.20250895

摘要

为研究高功率氮化镓器件散热性能, 构建氮化镓/石墨烯/金刚石异质结构, 采用分子动力学方法调控异质界面热输运特性, 并从声子输运角度揭示异质界面传热机理与调控机制. 研究发现Ga-C接触方式的界面热导是N-C结构的3倍, 且氮化镓/石墨烯/金刚石异质结构不具有热整流特性. N和B掺杂下界面热导先增大后减小, 但Si掺杂下界面热导单调增大. 两种Si掺杂势函数对应的界面热导差异不大, 但双势函数下的石墨烯结构更稳定. 线性掺杂和圆形掺杂两种掺杂形貌对界面热导影响不大, 但线性掺杂下石墨烯声子谱变化更具规律性. 氢化会严重阻碍界面传热, 但三种氢化结构下的界面热导均随氢化率增加而增大. 研究结果可为氮化镓器件热管理提供理论支持, 同时对突破大功率电子器件散热瓶颈具有指导价值.

关键词:

Abstract

In order to ascertain the heat dissipation performance of high-power gallium nitride devices, the thermal transport characteristics of GaN/graphene/diamond heterostructures are investigated at heterogeneous interfaces through molecular dynamics simulations. This study focuses on phonon transport mechanisms and regulatory strategies in the interfacial regions. The key findings are summarized below.Comparative analysis of two contact configurations reveals that the Ga-C structure exhibits an interfacial thermal conductance three times higher than that of the N-C structure, which is attributed to its larger phonon cutoff frequency and enhanced interfacial phonon coupling as evidenced by phonon spectral analysis. The intrinsic heterostructure demonstrates no thermal rectification characteristics without interface engineering. The analysis of hydrogenation effects shows that although hydrogenation generally hinders interfacial heat transfer, the thermal conductance increases paradoxically with the increase of hydrogenation ratio. This counterintuitive phenomenon arises from hydrogen-induced lattice disorder/hybridization scattering causing phonon localization (particularly severe in GaN-side hydrogenation), while generating new phonon coupling channels. The elemental doping investigations show that nitrogen and boron doping leads to an initial increase and subsequent decrease in interfacial thermal conductance, while silicon doping produces monotonic enhancement. Overlap factor analysis indicates that N and B doping first strengthens then weakens interfacial phonon coupling, whereas Si doping significantly improves coupling through synergistic effects of strong interfacial interactions and phonon focusing. Comparative evaluation of two Si doping potential functions shows that the difference in thermal conductance results is negligible. The studies on doping morphology show that although linear doping configurations can cause systematic changes in graphene phonon spectra, their influence on interfacial thermal conductance is minimal.These findings offer critical theoretical insights into thermal management optimization of GaN-based devices and provide fundamental guidance for overcoming thermal dissipation bottlenecks in high-power electronic systems.

Keywords:

作者及机构信息

1.
桂林电子科技大学机电工程学院, 广西高校微电子封装与组装技术重点实验室, 桂林　541004

2.
桂林立德智兴半导体有限公司, 桂林　541004

通信作者: 黄家强, huangjiaqiang201@163.com

基金项目: 2024年度广西高校中青年教师科研基础能力提升项目(批准号: 2024KY0203)、南宁市科学研究与技术开发计划科技重大专项(批准号: 20241026)、广西重点研发计划(批准号: 桂科AB25069315)、桂林电子科技大学研究生教育创新计划(批准号: 2024YCXS016)和2023年广西壮族自治区级新工科研究与实践项目(批准号: XGK202309)资助的课题.

Authors and contacts

1.
Guangxi Education Department Key Laboratory of Microelectronic Packaging and Assembly Technology, College of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China

2.
Guilin LDZX Semiconductor Co., Ltd., Guilin 541004, China

Corresponding author: HUANG Jiaqiang, huangjiaqiang201@163.com

Funds: Project supported by the 2024 Project on Enhancement of Basic Research Ability for Young and Middle-aged Teachers in Guangxi Universities, China (Grant No. 2024KY0203), the Nanning Scientific Research and Technology Development Plan Major Science and Technology Project, China (Grant No. 20241026), the Guangxi Key Research and Development Program, China (Grant No. Gui Ke AB25069315), the Guilin University of Electronic Technology’s Graduate Education Innovation Program, China (Grant No. 2024YCXS016), and the 2023 Guangxi Zhuang Autonomous Region Project for Research and Practice on New Engineering Disciplines, China (Grant No. XGK202309).

文章全文

参考文献

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施引文献

图 1 氮化镓/石墨烯/金刚石异质结构模型

Fig. 1. Heterostructure model of gallium nitride/graphene/diamond.

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图 2 (a) 热源、热汇能量累计; (b) 沿热流方向的温度分布

Fig. 2. (a) Accumulation of energy from heat source and heat sink; (b) temperature distribution along the direction of heat flow.

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图 3 (a) Ga-石墨烯接触方式结构模型; (b) N-石墨烯接触方式结构模型

Fig. 3. Interface model of (a) Ga-graphene and (b) N-graphene contact configurations.

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图 4 Ga-石墨烯和N-石墨烯接触方式下的界面热导对比图

Fig. 4. Comparison plot of interfacial thermal conductance for Ga-graphene and N-graphene contact configurations.

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图 5 Ga-石墨烯和N-石墨烯接触方式下的界面PDOS对比图

Fig. 5. Comparison plot of interfacial PDOS for Ga-graphene and N-graphene contact configurations.

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图 6 两种热流方向下的界面热导对比图

Fig. 6. Comparison plot of interfacial thermal conductance for two heat flow directions.

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图 7 双层石墨烯结构在不同热流方向下的界面热导对比图

Fig. 7. Comparison plot of interfacial thermal conductance in bilayer graphene structure under different heat flow directions.

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图 8 (a) 单侧氢化俯视图; (b) 双侧氢化侧视图

Fig. 8. (a) Top view of single-side hydrogenation; (b) Side view of double-side hydrogenation.

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图 9 三种氢化结构的界面热导变化图

Fig. 9. Plot of interfacial thermal conductance variation for three hydrogenated structures.

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图 10 (a) 双侧氢化结构中的石墨烯PDOS变化图; (b), (c), (d), (e)和(f) 不同氢化率对应的界面PDOS变化图

Fig. 10. (a) Plot of graphene PDOS variation in the double-side hydrogenated structure; (b), (c), (d), (e), and (f) plots of interfacial PDOS variation corresponding to different hydrogenation ratios

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图 11 氢化对PPR的影响

Fig. 11. Effect of Hydrogenation on PPR

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图 12 引入不同掺杂元素后的界面热导变化图

Fig. 12. Effects of three dopant elements on interfacial thermal conductance.

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图 13 氮和硼掺杂对重叠因子的影响　(a) 氮掺杂后的重叠因子; (b) 硼掺杂后的重叠因子

Fig. 13. Effects of nitrogen and boron doping on overlap factor: (a) Overlap factor after nitrogen doping; (b) overlap factor after boron doping.

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图 14 硅掺杂对PDOS的影响　(a) 石墨烯PDOS; (b) 重叠因子

Fig. 14. Effect of silicon doping on PDOS; (a) Graphene PDOS; (b) overlap factor.

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图 15 氮和硼掺杂对PPR的影响　(a) 硼掺杂后的PPR; (b) 氮掺杂后的PPR; (c) 不同硼掺杂率对应的PPR; (d) 不同氮掺杂率对应的PPR

Fig. 15. Effects of nitrogen and boron doping on PPR: (a) PPR after boron doping; (b) PPR after nitrogen doping; (c) PPR corresponding to different boron doping ratios; (d) PPR corresponding to different nitrogen doping ratios.

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图 16 两种势函数在随机掺杂方式下的界面热导对比图

Fig. 16. Comparison plot of interfacial thermal conductance for two potential functions under random doping configurations.

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图 17 两种势函数在规则掺杂方式下的界面热导对比图

Fig. 17. Comparison plot of interfacial thermal conductance for two potential functions under regular doping configurations.

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图 18 (a), (b), (c) 单势函数下的氮化镓、石墨烯和金刚石的PDOS变化图; (d), (e), (f) 双势函数下的氮化镓、石墨烯和金刚石的PDOS变化图

Fig. 18. (a), (b), (c) Plots of PDOS variation for gallium nitride, graphene, and diamond under the single potential function; (d), (e), (f) plots of PDOS variation for gallium nitride, graphene, and diamond under the double potential functions.

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图 19 两种规则掺杂形貌　(a) 线性Si掺杂; (b) 圆形Si掺杂

Fig. 19. Two regular doping morphologies: (a) Linear Si doping; (b) circular Si doping.

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图 20 两种掺杂形貌下的界面热导对比图

Fig. 20. Comparison plot of interfacial thermal conductance under two doping morphologies.

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图 21 (a), (b), (c)圆形掺杂下的氮化镓、石墨烯和金刚石的PDOS变化图; (d), (e), (f)线性掺杂下的氮化镓、石墨烯和金刚石的PDOS变化图

Fig. 21. (a), (b), (c) Plots of PDOS variation for gallium nitride, graphene, and diamond under circular doping; (d), (e), (f) plots of PDOS variation for gallium nitride, graphene, and diamond under linear doping.

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表 1 晶格参数

Table 1. Lattice parameters.

方向	氮化镓	石墨烯	金刚石
x	3.21629	2.46000	3.56679
y	5.57078	4.26084	3.56679
z	5.23966	—	3.56679

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表 2 Lennard-Jones势函数参数

Table 2. Lennard-Jones parameters.

原子1	原子2	$\varepsilon $/eV	$ \sigma$/Å
C	C	0.00361	3.671
C	Ga	0.00905	3.668
C	N	0.00369	3.346

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表 3 无热整流效应异质结构的调研结果表

Table 3. Investigation results of heterostructures without thermal rectification effect.

异质结构	一侧界面热导 /(GW·K^–1·m^–2)	另一侧界面热导 /(GW·K^–1·m^–2)	热整流比
Sn/h-BN^[32]	1.43×10^–2	1.39×10^–2	2.86%
Gra/h-BN^[31]	2.35×10^–1	2.51×10^–1	6.74%
Gra/SiC^[22]	3.77×10^–3	3.69×10^–3	2.21%
Gra/ZnO^[14]	8.75×10^–2	8.76×10^–2	0.15%

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map

[1]	Sajjad Hossain Rafin S M, Ahmed R, Haque M A, Hossain M K, Haque M A, Mohammed O A 2023 Micromachines-Basel 14 2045 Google Scholar
[2]	刘东静, 胡志亮, 周福, 王鹏博, 王振东, 李涛 2024 73 150202 Google Scholar Liu D J, Hu Z L, Zhou F, Wang P B, Wang Z D, Li T 2024 Acta Phys. Sin. 73 150202 Google Scholar
[3]	Zha J W, Wang F, Wan B Q 2025 Prog. Mater. Sci. 148 101362 Google Scholar
[4]	Giri A, Walton S G, Tomko J, Bhatt N, Johnson M J, Boris D R, Lu G, Caldwell J D, Prezhdo O V, Hopkins P E 2023 ACS Nano 17 14253 Google Scholar
[5]	Liu D, Wang S, Zhu J, Li H, Zhu H 2022 Phys. Lett. A 426 127895 Google Scholar
[6]	Lee W, Kihm K D, Kim H G, Lee W, Cheon S, Yeom S, Lim G, Pyun K R, Ko S H, Shin S 2018 Carbon 138 98 Google Scholar
[7]	Chegel R 2023 Diamond Relat. Mater. 137 110154 Google Scholar
[8]	Song J, Xu Z, He X 2020 Int. J. Heat Mass Transfer 157 119954 Google Scholar
[9]	Liu F, Zou R, Hu N, Ning H, Yan C, Liu Y, Wu L, Mo F, Fu S 2019 Nanoscale 11 4067 Google Scholar
[10]	Yang H, Gao S, Pan Y, Yang P 2024 Int. Commun. Heat Mass Transfer 155 107521 Google Scholar
[11]	Dong S, Yang B, Xin Q, Lan X, Wang X, Xin G 2022 Phys. Chem. Chem. Phys. 24 12837 Google Scholar
[12]	Yang Y, Ma J, Yang J, Zhang Y 2022 ACS Appl. Mater. Interfaces 14 45742 Google Scholar
[13]	Chen G F, Bao W L, Chen J, Wang Z L 2022 Carbon 190 170 Google Scholar
[14]	Wang J, Shen Y, Yang P 2023 Compos. Commun. 40 101616 Google Scholar
[15]	Farzadian O, Yousefi F, Shafiee M, Khoeini F, Spitas C, Kostas K V 2024 J. Mol. Graph. Model. 129 108763 Google Scholar
[16]	Yang B, Li D, Qi L, Li T, Yang P 2019 Phys. Lett. A 383 1306 Google Scholar
[17]	Oi N, Okubo S, Tsuyuzaki I, Hiraiwa A, Kawarada H 2024 IEEE Electron Device Lett. 45 1554 Google Scholar
[18]	Wang Y, Wang S, Zhang Y, Cheng Z, Yang D, Wang Y, Wang T, Cheng L, Wu Y, Hao Y 2024 Nanoscale 16 15170 Google Scholar
[19]	Yang B, Wang J, Yang Z, Xin Z, Zhang N, Zheng H, Wu X 2023 Mater. Today Phys. 30 100948 Google Scholar
[20]	朱洪涛, 黎广荣, 方诚, 周义朋, 方志杰, 赵凯 2023 岩石矿物学杂志 42 673 Google Scholar Zhu H T, Li G R, Fang C, Zhou Y P, Fang Z J, Zhao K 2023 ACTA Petrol. Mineral. 42 673 Google Scholar
[21]	Tao L, Theruvakkattil Sreenivasan S, Shahsavari R 2017 ACS Appl. Mater. Interfaces 9 989 Google Scholar
[22]	Islam M S, Mia I, Ahammed S, Stampfl C, Park J 2020 Sci. Rep. 10 22050 Google Scholar
[23]	Liang Q, Wei Y 2014 Phys. B: Condens. Matter 437 36 Google Scholar
[24]	Erhart P, Albe K 2005 Phys. Rev. B 71 035211 Google Scholar
[25]	杨兵 2021 博士学位论文 (镇江: 江苏大学) Yang B 2021 Ph. D. Dissertation (ZhenJiang: Jiangsu University
[26]	刘东静, 周福, 陈帅阳, 胡志亮 2023 72 157901 Google Scholar Liu D J, Zhou F, Chen S Y, Hu Z L, 2023 Acta Phys. Sin. 72 157901 Google Scholar
[27]	刘东静, 王韶铭, 杨平 2021 70 187302 Google Scholar Liu D J, Wang S M, Yang P 2021 Acta Phys. Sin. 70 187302 Google Scholar
[28]	邵常焜, 汤勇, 陈恭, 余树东, 颜才满, 丁鑫锐, 袁伟, 张仕伟 2024 机械工程学报 60 271 Google Scholar Shao C K, Tang Y, Chen G, Yu S D, Yan C M, Ding X R, Yuan W, Zhang S W 2024 J. Mech. Eng. 60 271 Google Scholar
[29]	Ding H B, He J R, Ding L M, He T 2024 DeCarbon 4 100048 Google Scholar
[30]	Zhao H, Yang X, Wang C, Lu R, Zhang T, Chen H, Zheng X 2023 Mater. Today Phys. 30 100941 Google Scholar
[31]	Yang Y, Ma J, Pei Q X, Yang J, Zhang Y 2023 Int. J. Heat Mass Transfer 216 124558 Google Scholar
[32]	Das P, Paul P, Hassan M, Morshed A M, Paul T C 2025 Comput. Mater. Sci 246 113359 Google Scholar
[33]	Kochaev A, Maslov M, Katin K, Efimov V, Efimova I 2022 Mater. Today Nano 20 100247 Google Scholar
[34]	佟赞, 杨银利, 徐晶, 刘伟, 陈亮 2023 72 068201 Google Scholar Tong Z, Yang Y L, Xu J, Liu W, Chen L 2023 Acta Phys. Sin. 72 068201 Google Scholar
[35]	向鑫, 刘浪, 把静文 2023 原子与分子 40 032002 Google Scholar Xiang X, Liu L, Ba J W 2023 J. Atom. Mol. Phys. 40 032002 Google Scholar
[36]	Yang B, Li D, Yang H, Wang J, Yang P 2020 Int. Commun. Heat Mass Transfer 117 104735 Google Scholar
[37]	Goharshadi E K, Mahdizadeh S J 2015 J. Mol. Graphics Modell 62 74 Google Scholar
[38]	Weng Y K, Yousefzadi Nobakht A, Shin S, Kihm K D, Aaron D S 2021 Int. J. Heat Mass Transfer 169 120979 Google Scholar
[39]	Majeti V K, Roy A, Gupta K K, Dey S 2020 IOP Conf. Ser.: Mater. Sci. Eng. 2020 012188 Google Scholar
[40]	Habibur Rahman M, Mitra S, Motalab M, Bose P 2020 RSC Adv. 10 31318 Google Scholar
[41]	Rajasekaran G, Kumar R, Parashar A 2016 Mater. Res. Express 3 035011 Google Scholar
[42]	Zhang X, Zhang J, Yang M 2020 Solid State Commun. 309 113845 Google Scholar

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