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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 林建中 | zh_TW |
| dc.contributor.advisor | Chien-Chung Lin | en |
| dc.contributor.author | 黃子嘉 | zh_TW |
| dc.contributor.author | Tzu-Chia Huang | en |
| dc.date.accessioned | 2024-12-24T16:14:40Z | - |
| dc.date.available | 2024-12-25 | - |
| dc.date.copyright | 2024-12-24 | - |
| dc.date.issued | 2024 | - |
| dc.date.submitted | 2024-12-13 | - |
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Quantum dot integrated LEDs using photonic and excitonic color conversion. Nano Today, 6(6), 632-647. [35] Han, H. V., H. Y. Lin, C. C. Lin, W. C. Chong, J. R. Li, K. J. Chen, P. Yu, T. M. Chen, H.M. Chen, K. M. Lau and H. C. Kuo (2015). "Resonant-enhanced full-color emission of quantum-dot-based micro LED display technology." Opt Express 23(25):32504-32515. [36] Li, C., Z. Zang, W. Chen, Z. Hu, X. Tang, W. Hu, K. Sun, X. Liu and W. Chen (2016)."Highly pure green light emission of perovskite CsPbBr(3) quantum dots and their application for green light-emitting diodes." Opt Express 24(13): 15071-15078. [37] Li, J., Y. Tang, Z. Li, X. Ding, B. Yu and L. Lin (2019). "Largely Enhancing Luminous Efficacy, Color-Conversion Efficiency, and Stability for Quantum-Dot White LEDs Using the Two-Dimensional Hexagonal Pore Structure of SBA-15 Mesoporous Particles." ACS Appl Mater Interfaces 11(20): 18808-18816. [38] Mandal, S., A. C. Reber, M. Qian, P. S. Weiss, S. N. Khanna and A. Sen (2013)."Controlling the Band Gap Energy of Cluster-Assembled Materials." Accounts of Chemical Research 46(11): 2385-2395. [39] R. Paschotta, article on "Band Gap" in the <ahref="https://doi.org/10.61835/enc">RP Photonics Encyclopedia</a>, retrieved 2024-11-18, https://doi.org/10.61835/9f5" title=" [40] An illustrative diagram showing the light-emission principle of LEDs Available from: https://toshiba-semicon-storage.com/cn/semiconductor/knowledge/e-learning/discrete/chap5/chap5-2.html [41] W. Dong, "LEDs’ Working Principle and Its Technological Breakthrough of GaN," 2021 International Conference on Electronics, Circuits and Information Engineering (ECIE), Zhengzhou, China, 2021, pp. 60-64, doi: 10.1109/ECIE52353.2021.00020. [42] Y. Wang, J. M. Alonso and X. Ruan, "A Review of LED Drivers and Related Technologies," in IEEE Transactions on Industrial Electronics, vol. 64, no. 7, pp.5754-5765, July 2017, doi: 10.1109/TIE.2017.2677335. [43] Osypiw, A. R. C., S. Lee, S.-M. Jung, S. Leoni, P. M. Smowton, B. Hou, J. M. Kim and G. A. J. Amaratunga (2022). "Solution-processed colloidal quantum dots for light emission." Materials Advances 3(17): 6773-6790. [44] Chang, W.-Y., Y. Kuo, Y.-W. Kiang and C. C. Yang (2019). "Simulation study on light color conversion enhancement through surface plasmon coupling." Optics Express 27(12): A629-A642. [45] 林冠騰(2022), “微載體混合膠體量子點發光二極體封裝結構,” 國立陽明交通大學, 臺灣博碩士論文知識加值系統. | - |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/96301 | - |
| dc.description.abstract | 量子點在現今顯示技術中扮演的角色日益重要， 在光電領域中被廣泛應用，包括發光二極體 (LED)、顯示器、太陽能電池和生物成像等。量子點具備高亮度、色域廣、半高寬窄和良好的穩定性等優點 ，使其成為提升顏色轉換效率和光學性能的理想材料。不過，量子點的自聚集和再吸收效應可能影響其應用性能，需要透過精細的封裝和材料選擇來進行優化。
本論文中，我們使用的 LED 導線架規格為 5050，實驗前後皆會用積分球量測LED 的光譜、光強度及發光效率等。而實驗中，我們主要使用硫化鋅包覆硒化鎘量子點甲苯溶液及二甲基矽氧甲烷(PDMS) ，與多孔二氧化矽微球混合 ，用“膠體混合”以及 “層狀結構+”兩種不同的封裝結構與之前的樣品比較其光譜及顏色轉換效率之變化。 實驗結果顯示，只有 PDMS 混合膠體量子點的樣品的顏色轉換效率較以往又更進步了一些，而“膠體混合”封裝在中、低濃度時，多孔二氧化矽微球的顏色轉換效率也相較以往使用微載體進行混合時提升了不少;至於“層狀結構+”封裝，多孔二氧化矽微球在中濃度時較微載體好上許多，但到了高濃度時，則有略為下降的趨勢。 | zh_TW |
| dc.description.abstract | Quantum dots play an increasingly important role in modern display technology and are widely used in the optoelectronic field, including applications such as light-emitting diodes (LEDs), displays, solar cells, and bio-imaging. Quantum dots offer advantages such as high brightness, a wide color gamut, narrow full-width at half-maximum (FWHM), and excellent stability, making them ideal materials for improving color conversion efficiency and optical performance. However, quantum dot self-aggregation and reabsorption effects may impact their performance, necessitating optimization through precise encapsulation and material selection.
In this study, we used LED lead frames with 5050 specifications and measured the spectrum, light intensity, and luminous efficiency of the LEDs with an integrating sphere before and after the experiments. The primary materials used in the experiments included cadmium selenide (CdSe)-coated zinc sulfide (ZnS) quantum dots in toluene solution and polydimethylsiloxane (PDMS), mixed with porous silica microspheres. We compared the spectral and color conversion efficiency (CCE) changes using two different encapsulation structures, "mixed" and "layered+," against previous samples. The experimental results showed that samples with colloidal quantum dots mixed solely with PDMS exhibited further improvements in color conversion efficiency compared to previous iterations. For "mixed" encapsulation, the color conversion efficiency of porous silica microspheres at medium and low concentrations was significantly enhanced compared to mixing with microcarriers in the past. Regarding the "layered+" encapsulation, porous silica microspheres performed much better than microcarriers at medium concentrations but exhibited a slight decline at high concentrations. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2024-12-24T16:14:40Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2024-12-24T16:14:40Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 致謝................................................................................................................................. i
摘要................................................................................................................................ ii Abstract ........................................................................................................................ iii Content ........................................................................................................................... v List of Figure ................................................................................................................ vii List of Table .................................................................................................................. xi Chapter 1 Introduction ................................................................................................ 1 1.1 Light Emitting Diode (LED) ...................................................................... 1 1.2 Quantum dots .............................................................................................. 3 1.3 Colloidal quantum dots ............................................................................... 5 1.4 Microcarriers ............................................................................................... 7 1.5 Porous silica microspheres .......................................................................... 8 1.6 Experiment motivation .............................................................................. 10 1.7 Literature review ....................................................................................... 11 Chapter 2 Theoretical Background ........................................................................... 14 2.1 Semiconductor energy band theory .......................................................... 14 2.2 The working principle of LEDs ................................................................ 16 2.3 Emission Principle of Colloidal Quantum Dots ...................................... 18 2.4 Definition of color conversion efficiency ............................................... 19 Chapter 3 Experiment and Measurement Setup ....................................................... 21 3.1 CdSe Colloidal Quantum Dots................................................................. 21 3.2 Fabrication of CdSe CQD LEDs .............................................................. 23 3.3 Integrating Sphere System ....................................................................... 25 Chapter 4 Optical characteristic analysis .................................................................. 27 4.1 Preparation for the experiment ................................................................. 27 4.2 CQDs/PDMS QDLED Package ................................................................ 28 4.3 Mixed CQDs/PDMS QDLED Package ................................................... 35 4.4 Layered plus CQDs/PDMS QDLED Package ......................................... 42 4.5 Optical result of the in-chip structures ..................................................... 47 4.6 Optical result of the mixed structures ....................................................... 49 4.7 Optical result of the layered plus structure ............................................... 51 Chapter 5 Conclusion and Future Work ................................................................... 54 Reference ..................................................................................................................... 56 | - |
| dc.language.iso | en | - |
| dc.subject | 封裝 | zh_TW |
| dc.subject | 量子點 | zh_TW |
| dc.subject | 二氧化矽微球 | zh_TW |
| dc.subject | 多孔 | zh_TW |
| dc.subject | 顏色轉換效率 | zh_TW |
| dc.subject | color conversion efficiency | en |
| dc.subject | quantum dots | en |
| dc.subject | porous | en |
| dc.subject | silica microspheres | en |
| dc.subject | encapsulation | en |
| dc.title | 高顏色轉換效率之膠體量子點發光二極體封裝於二氧化矽多孔性微球之研究 | zh_TW |
| dc.title | High color conversion efficiency colloidal quantum dot light emitting diode packaging study with porous silica microspheres | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 113-1 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 林俊廷;陳奕君 | zh_TW |
| dc.contributor.oralexamcommittee | Jin-Ting Lin;Yi-Jun Chen | en |
| dc.subject.keyword | 量子點,多孔,二氧化矽微球,封裝,顏色轉換效率, | zh_TW |
| dc.subject.keyword | quantum dots,porous,silica microspheres,encapsulation,color conversion efficiency, | en |
| dc.relation.page | 59 | - |
| dc.identifier.doi | 10.6342/NTU202404719 | - |
| dc.rights.note | 同意授權(全球公開) | - |
| dc.date.accepted | 2024-12-13 | - |
| dc.contributor.author-college | 電機資訊學院 | - |
| dc.contributor.author-dept | 光電工程學研究所 | - |
| 顯示於系所單位： | 光電工程學研究所 | |
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