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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 何志浩 | |
| dc.contributor.author | Guan-Jhong Lin | en |
| dc.contributor.author | 林冠中 | zh_TW |
| dc.date.accessioned | 2021-06-17T00:24:26Z | - |
| dc.date.available | 2012-06-27 | |
| dc.date.copyright | 2012-06-27 | |
| dc.date.issued | 2011 | |
| dc.date.submitted | 2012-05-08 | |
| dc.identifier.citation | Ch 1
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/66174 | - |
| dc.description.abstract | 在本論文中，氮化物太陽能電池採用多重量子井式 (multiple quantum well) 的吸光層結構。在此之中，分別加入15 % 與30 % 之的銦含量，並分析整體元件的結構與物理性質。同時，透過發光頻譜、模擬太陽光源 (air mass 1.5G) 照射下所測的I-V曲線圖與外部量子效率 (external quantum efficiency) 在不同波長下的分佈，可以發現銦 (indium) 含量較高的元件，由於晶格品質較差，其所產生的光電轉換效率 (conversion efficiency) 也較低。除此之外，為了更清楚地了解吸光層中載子在不同溫度下的表現，藉由調控溫度在100 K – 400 K之間測量元件的I-V曲線，獲得轉換效率與填充因子 (filling factor) 的變化，可得知銦含量較高的元件，雖然其轉換效率較低，但因吸光層中有鎵 (gallium)、銦相分離 (phase separation) 的現象產生，故而當溫度提升時，該元件的光伏 (photovoltaic) 特性有較顯著的改變。
為了提升氮化物太陽能電池的轉換效率，利用水熱法 (hydrothermal method.) 成長低維度氧化鋅奈米柱陣列 (zinc oxide nanorod arrays) 結構作為表面的抗反射層；透過調控此一製程的相關參數與數值模擬，可獲得最佳的奈米柱陣列的幾何特徵，使氮化物太陽能電池表面的抗反射層，在可見光的波長範圍內，達到最高的穿透能力，並進一步了解結構與成長條件對電子傳輸與光特性之影響。此外，使用針狀式的氧化鋅奈米柱陣列將可大幅改善氮化物太陽能電池光伏特性。 | zh_TW |
| dc.description.abstract | Indium gallium nitride (InGaN) is a promising material for photovoltaic devices due to it potential to realize nearly full absorption of solar spectrum. A challenge for InGaN-based solar cells is the deteriorated crystal qualities at high indium (In) contents. In this thesis, severe In fluctuation is observed in InxGa1-xN/GaN multiple quantum well (MQW) solar cells for x = 0.3 using scanning transmission electron microscopy. The strong fluctuation and sacrificed crystal qualities lead to unsatisfactory photovoltaic performances. A strong temperature-dependent characteristic is observed for the device and is attributed to the photocurrents thermally activated from the shallow QWs.
In order to enhance the conversion efficiency (η), zinc oxide (ZnO) nanorod arrays (NRAs) are applied as the antireflection (AR) coating on InGaN/GaN MQW solar cells. The NRAs are synthesized by a cost-effective hydrothermal method. The length of NRAs plays an important role in photovoltaic characteristics considering the trade-off between AR performances and bandgap absorption of ZnO. In addition, the syringe-like ZnO NRAs possessing superior advantages to the flat-top ZnO NRAs are also applied as the light-harvesting layer, resulting in the improvement of 36 % from that obtained on the solar cells with bare surface. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-17T00:24:26Z (GMT). No. of bitstreams: 1 ntu-100-R98941051-1.pdf: 1872417 bytes, checksum: 43d152ecf97c4b3c9b9fe00531ec3732 (MD5) Previous issue date: 2011 | en |
| dc.description.tableofcontents | 口試委員會審定書 I
Acknowledgement II Abbreviations III 摘要 IV Abstract V Table of Contents VII List of Figures VIIII List of Tables VIII Chapter 1 Introduction 1 1.1 InGaN-based Optoelectronic Devices 1 1.2 References 4 Chapter 2 Experimental 6 2.1 InxGa1-xN/GaN MQW Solar Cells 6 2.2 ZnO NRAs Fabrication 7 2.3 Measurements and Analyses 8 Chapter 3 Effect of Indium Fluctuation on the Photovoltaic Characteristics of InGaN/GaN Multiple Quantum Well Solar Cells 10 3.1 Introduction 10 3.2 Experiment 12 3.2 Results and discussion 12 3.4 Summary 19 3.5 References 20 Chapter 4 Origin of Hot Carriers in InGaN-Based Quantum-Well Solar Cells 23 4.1 Introduction 23 4.2 Experiment 25 4.3 Results and discussion 26 4.4 Summary 33 4.5 References 34 Chapter 5 Efficiency Enhancement of InGaN-Based Multiple Quantum Well Solar Cells Employing Antireflective ZnO Nanorod Arrays 37 5.1 Introduction 37 5.2 Experiment 39 5.3 Results and discussion 40 5.4 Summary 48 5.5 References 49 Chapter 6 Solar Energy Harvesting Scheme using Syringe-like ZnO Nanorod Arrays for InGaN/GaN Multiple Quantum Well Solar Cells 52 6.1 Introduction 52 6.2 Experiment 55 6.3 Results and discussion 56 6.4 Summary 62 6.5 References 63 Chapter 7 Conclusion 67 Chapter 8 Future Prospects 69 Guan-Jhong Lin curriculum vitae 70 Publication list 72 | |
| dc.language.iso | en | |
| dc.subject | 抗反射 | zh_TW |
| dc.subject | 多重量子井 | zh_TW |
| dc.subject | 氮化物太陽能電池 | zh_TW |
| dc.subject | 氧化鋅奈米柱陣列 | zh_TW |
| dc.subject | ZnO NRAs | en |
| dc.subject | MQW | en |
| dc.subject | antireflection coating | en |
| dc.subject | InGaN-based solar celsl | en |
| dc.title | 氮化銦鎵/氮化鎵多重量子井之光伏物理性質分析 | zh_TW |
| dc.title | Photovoltaic Physics of InGaN/GaN Multiple Quantum Wells | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 100-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 杜立偉,陳永芳,張亦中 | |
| dc.subject.keyword | 多重量子井,氮化物太陽能電池,氧化鋅奈米柱陣列,抗反射, | zh_TW |
| dc.subject.keyword | MQW,InGaN-based solar celsl,ZnO NRAs,antireflection coating, | en |
| dc.relation.page | 78 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2012-05-08 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 光電工程學研究所 | zh_TW |
| 顯示於系所單位： | 光電工程學研究所 | |
文件中的檔案：
| 檔案 | 大小 | 格式 | |
|---|---|---|---|
| ntu-100-1.pdf 未授權公開取用 | 1.83 MB | Adobe PDF |
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