有限尺寸六方氮化硼奈米帶之熱電特性

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莊凱傑(Kai-Jie Jhuang) 查詢紙本館藏

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電機工程學系

論文名稱

有限尺寸六方氮化硼奈米帶之熱電特性

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摘要(中)

近年來，隨著能源轉型的興起，熱電材料的研究愈發盛行，因為熱電材料可以將能源消耗所產生的廢熱轉換成電能，進而減少對地球的汙染。從過去的研究可以得知，石墨烯奈米帶在熱電材料領域中具有良好的應用潛力。因此，本論文想探討與石墨烯奈米帶晶格結構相似的六方氮化硼奈米帶的熱電特性。首先，我們先利用程式去建構模型後，再去改變尺寸、穿隧率及溫度並觀察電導、席貝克係數、功率因子及熱電優值的變化。我們從結果可以發現六方氮化硼奈米帶不僅聲子熱導較低，熱電參數也是相當穩定，功率因子及熱電優值不會因尺寸改變及環境因素而有劇烈的變化。

摘要(英)

In recent years, with the rise of energy transition, research on thermoelectric materials has become increasingly popular. Thermoelectric materials have the ability to convert waste heat generated by energy consumption into electrical energy, thereby reducing pollution to the Earth. Previous research has shown that graphene nanoribbons have great potential in the field of thermoelectric materials. Therefore, this paper aims to research the thermoelectric performance of hexagonal boron nitride nanoribbons, which have a lattice structure similar to graphene nanoribbons. Firstly, we construct models using a program and then vary the dimensions, tunneling rates, and temperatures to observe changes in electrical conductivity, Seebeck coefficient, power factor, and thermoelectric figure of merit. From the results, we find that hexagonal boron nitride nanoribbons not only have lower phonon thermal conductivity but also exhibit stable thermoelectric parameters. The power factor and thermoelectric figure of merit do not undergo drastic changes with variations in dimensions or environmental factors.

關鍵字(中)

★ 氮化硼奈米帶
★ 熱電特性

關鍵字(英)

論文目次

摘要 I
Abstract II
目錄 III
圖目錄 V
第一章、導論 1
1-1 前言 1
1-2 熱電效應 1
1-3 六方氮化硼 3
1-4 研究動機 5
第二章、系統模型 6
2-1 六方氮化硼奈米帶耦合電極之系統 6
2-2 系統電子總能 7
2-3 熱電係數推導 8
第三章、模擬結果與討論 10
3-1 帶寬對傳輸係數的影響 10
3-2 帶寬對熱電特性的影響 11
3-3 帶長對熱電特性的影響 13
3-4 穿隧率對熱電特性的影響 15
3-5 溫度對熱電特性的影響 17
第四章、結論 19
參考文獻 20

參考文獻

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指導教授

郭明庭(Ming-Ting Kuo)

審核日期

2023-6-9

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