| 纳米线阵列横向输运的热电特性研究 |
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| 引用本文： | 张轶群,Shi Yi,濮林,Zhang Rong,郑有蚪.纳米线阵列横向输运的热电特性研究[J].物理学报,2008,57(8):5198-5204. |
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| 作者姓名： | 张轶群 Shi Yi 濮林 Zhang Rong 郑有蚪 |
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| 作者单位： | 南京大学物理系，江苏省光电功能材料重点实验室，南京 210093 |
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| 基金项目： | 国家自然科学基金(批准号：90606021，60676006)和国家重点基础研究发展规划(批准号：2007CB936300). |
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| 摘 要： | 利用包络函数的平面波展开法计算准二维纳米线阵列中的电子态，获得电输运系数表达式.同时，通过合理近似考虑边界散射对声子输运的影响，计算得到了晶格热导率.以Si/Ge体系为例，研究了纳米线阵列横向输运的热电特性.结果表明：结构优值与费米能级、纳米线直径及间距等参数相关.通过对结构参数的调整，纳米线阵列的横向输运可有效提高热电性能.
关键词：
热电性能
纳米线阵列
Seebeck系数
晶格热导率
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| 关 键 词： | 热电性能 纳米线阵列 Seebeck系数 晶格热导率 |
| 收稿时间： | 2007-12-08 |
| 修稿时间： | 4/1/2008 12:00:00 AM |
Thermoelectric properties of transverse transport in nanowire array structures |
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| Zhang Yi-Qun,Shi Yi,Pu Lin,Zhang Rong,Zheng You-Dou.Thermoelectric properties of transverse transport in nanowire array structures[J].Acta Physica Sinica,2008,57(8):5198-5204. |
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| Authors: | Zhang Yi-Qun Shi Yi Pu Lin Zhang Rong Zheng You-Dou |
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| Abstract: | The electronic structures of nanowire-composite arrays are calculated theoretically in the framework of effective-mass envelope function theory，and various coefficients about electronic transport are obtained. At the same time，a closed-form expression based on boundary scattering theory for lattice thermal conductivity is presented. Then the thermoelectric properties of Si nanowire/Ge host material are investigated as function of the Fermi energy，wire diameter and separation between nanowire sidewalls. The results show that the ZT value of nanowire-composite can be significantly increased by carefully adjusting the correlative parameters of the structure. |
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| Keywords: | thermoelectric properties nanowire arrays Seebeck coefficient lattice thermal conductivity |
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