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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 蘇國棟(Guo-Dung Su) | |
| dc.contributor.author | Chi-Min Liu | en |
| dc.contributor.author | 劉奇旻 | zh_TW |
| dc.date.accessioned | 2021-06-15T13:56:34Z | - |
| dc.date.available | 2020-08-26 | |
| dc.date.copyright | 2015-08-26 | |
| dc.date.issued | 2015 | |
| dc.date.submitted | 2015-08-25 | |
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[18] Pen-Ko Chou, Cheng-Yi Liu, “Influence of Current Spreading on Internal Quantum Efficiency in GaN-LED,” Department of Chemical & Materials Engineering National Central University Jhong-Li, Taiwan June, 2008 [19] Shih-Yu Hung, Che-Ping Lin, Hsiharng Yang, Ying-Pin Chang, “Optimal design using thermal reflow and caulking for fabrication of gapless microlens array mold inserts,” Optical Engineering, vol. 46, pp.0091-3286, 2007 [20] Mao-Kuo Wei, I-Lin Su, “Method to evaluate the enhancement of luminance efficiency in planar OLED light emitting devices for microlens array,” Optics Express, vol. 12, pp. 5777-5782, 2004 [21] A. Schilling, R. Merz, C. Ossmann, and H. P. Herzig, “Surface profiles of reflow microlenses under the influence of surface tension and gravity,” Optical Engineering, vol. 39, pp. 2171-2176, 2000. [22] P. Nussbaum, R. Völkel, H. P. Herzig, M. Eisner, and S. 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[30] Ken-ichiro Nakamatsu, Makoto Okada, Chiaki Minari, Yoshiyuki Takeuchi, Noriaki Taneichi, Shoji Ohtaka and Shinji Matsui, “Effect of UV Irradiation on Microlens Arrays Fabricated by Room Temperature Nanoimprinting Using Organic Spin-on-Glass,” Applied Physics Express, vol. 1, no. 6, (2008) [31] Jeong-Keun Ji and Young-Se Kwon, “Conical microlens arrays that flatten optical-irradiance profiles of nonuniform sources,” Applied optics, vol. 34, no. 16, (1994) | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/51906 | - |
| dc.description.abstract | 本論文中我們提出一個低成本的製程方法將旋塗式玻璃微透鏡製作至紫外光發光二極體上。旋塗式玻璃微透鏡是利用光阻熱處理及多次翻模技術製程，這能有效的降低製程成本。在我們的實驗中，我們製作了不同直徑大小的旋塗式玻璃微透鏡，分別有200, 150, 100及50微米的直徑，並且得到光萃取率提升分別為7.31%, 10.35%, 14.01% 及21.86%。同時，我們也製作了不同形狀的微透鏡，分別有圓形、正方形及六角形，並且得到光萃取率提升分別為7.31%, 9.6%及13.8%。我們利用透鏡圖形的優化，實驗上能有效地將光萃取率提升至21.86%，並且不會破壞任何紫外光發光二極體的電性。 | zh_TW |
| dc.description.abstract | In this paper, we present a cost-effective method to fabricate spin on glass microlens array (SOG MLA) on ultra-violet light emitting diodes (UV LEDs). SOG microlens array was formed by thermal reflow technique and multiple replication processes which can reduce the cost of solution process. In our experiments, we fabricated different diameter size SOG microlens arrays whose diameter of each size was about 200, 150, 100 and 50 μm. The light extraction efficiency is improved by 7.31%, 10.35%, 14.01% and 21.86%, respectively. We also fabricated the different shape SOG microlenses, which was circular, square and hexagonal. The light extraction efficiency is improved by 7.31%, 9.6% and 13.8% for circular, square and hexagonal SOG MLA, respectively. By applying optimized lens pattern, an increase of 21.86% in improved light extraction efficiency is achieved experimentally, without detrimental effect to the electrical performance of the UV LEDs. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-15T13:56:34Z (GMT). No. of bitstreams: 1 ntu-104-R02941095-1.pdf: 5091010 bytes, checksum: 25595e1393206dc16b76bed55130b8d0 (MD5) Previous issue date: 2015 | en |
| dc.description.tableofcontents | 目錄
誌謝 i 中文摘要 ii ABSTRACT iii CONTENTS iii LIST OF FIGURES vi LIST OF TABLES vi Chapter 1 Introduction 1 1.1 Review fabrication of technologies of microlens array 1 1.1.1 Reconfigurable microtemplating 4 1.1.2 Thermal reflow of photoresist [2] 5 1.1.3 Laser beam writing [4] 6 1.1.4 Deep lithography with protons (DLP) [5] 6 1.1.5 Laser ablation [6] 8 1.1.6 Microjet printing process 10 1.2 Ultra-violet Light emitting diodes (UV LEDs) 14 1.2.1 Internal Quantum Efficiency of UV-LED 17 1.2.2 Light Extraction Efficiency of UV-LED 18 Chapter 2 Simulation results 20 2.1 Introduction of simulation 20 2.2 Analysis of different size microlens 22 2.3 Analysis of different shape microlens 26 Chapter 3 Working principle and fabrication process 33 3.1 Thermal reflow 33 3.2 Materials 38 3.2.1 AZ P4620 39 3.2.2 Polydimethylsiloxane 40 3.2.3 Spin on glass [28] 41 3.3 Fabrication process 47 3.3.1 Photoresist microlens array 47 3.3.2 Planar PDMS microlens array 47 3.3.3 Surface treatment 50 3.3.4 SOG microlens array 52 Chapter 4 Experiment results 53 4.1 Characteristic of Spin on glass 53 4.2 Different size SOG microlens 58 4.3 Different shape SOG microlens 60 Chapter 5 Conclusions 72 REFERENCE 73 | |
| dc.language.iso | en | |
| dc.subject | 多次翻模製程 | zh_TW |
| dc.subject | 微透鏡 | zh_TW |
| dc.subject | 旋塗式玻璃 | zh_TW |
| dc.subject | 紫外光發光二極體 | zh_TW |
| dc.subject | 光萃取率 | zh_TW |
| dc.subject | microlens array | en |
| dc.subject | spin on glass | en |
| dc.subject | replication process | en |
| dc.subject | light extraction efficiency | en |
| dc.subject | ultra-violet light emitting diode | en |
| dc.title | 旋塗式玻璃微透鏡應用在紫外光發光二極體取光效率提升 | zh_TW |
| dc.title | Extraction efficiency enhancement in ultra-violet LEDs based on spin on glass microlenses | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 103-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 蔡永傑,黃鼎偉 | |
| dc.subject.keyword | 微透鏡,旋塗式玻璃,紫外光發光二極體,光萃取率,多次翻模製程, | zh_TW |
| dc.subject.keyword | spin on glass,microlens array,ultra-violet light emitting diode,light extraction efficiency,replication process, | en |
| dc.relation.page | 77 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2015-08-25 | |
| 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 | |
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