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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/29799完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 邱奕鵬 | |
| dc.contributor.author | TUN-MIN CHANG | en |
| dc.contributor.author | 張敦岷 | zh_TW |
| dc.date.accessioned | 2021-06-13T01:19:21Z | - |
| dc.date.available | 2008-07-24 | |
| dc.date.copyright | 2007-07-24 | |
| dc.date.issued | 2007 | |
| dc.date.submitted | 2007-07-19 | |
| dc.identifier.citation | 參考文獻
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[11] V. Bulovi´c, V. B. Khalfin, G. Gu, and P. E. Burrows, “Weak microcavity effects in organic light-emitting devices,” Phys. Rev. B, vol.58, No. 7, pp. 3730-3740, 1998. [12] A. Taflove and S. C. Hagness, Computational Electrodynamics: The Finite-Difference Time-Domain Method, 2nd ed., Boston, Artech House, 2000. [13] S. M¨oller and S. R. Forrest, “Improved light out-coupling in organic light emitting diodes employing ordered microlens arrays,” J. Appl. Phys., vol. 91, pp. 3324-3327, 2002. [14] 陳金鑫, 黃孝文著,OLED: 有機電激發光材料與元件, 初版, 五南圖書出 版有限公司, 臺北市, 2005. [15] 史光國著,半導體發光二極體與固態照明, 初版, 全華科技圖書股份有限公 司, 臺北市, 2005. [16] M. H. Lu and J. C. Sturm, “Optimization of external coupling and light emission in organic light-emitting devices: modeling and experiment,” J. Appl. Phys., vol. 91, No. 2, pp. 595-604, 2002. [17] B. J. Matterson, J. M. Lupton, A. F. Safonov, M. G. Salt, W. L. Barnes, and I. D. W. 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Meerholz, and D. C. M¨uller, “Outsmarting waveguide losses in thin-film light-emitting diodes,” Adv. Funct. Mater., vol. 11, No. 4, pp. 251-253, 2002. [23] T. Tsutsui, M. Yahiro, H. Yokogawa, K. Kawano, and M. Yokoyama, “Doubling coupling-out efficiency in organic light-emitting devices using a thin silica aerogel layer,” Adv. Mater., vol. 13, No. 15, pp. 1149-1152, 2001. [24] G. Gu, D. Z. Garbuzov, P. E. Burrows, S. Venkatesh, S. R. Forrest, and M. E. Thompson, “High-external-quantum-efficiency organic light-emitting devices,” OSA, vol. 22, No. 6, pp. 396-398, 1997. [25] H. J. Peng, Y. L. Ho, X. J. Yu, and H. S. Kwok, “Enhanced coupling of light from organic light emitting diodes using nanoporous films,” J. Appl. Phys., vol. 91, No. 3, pp. 1649-1654, 2004. [26] S. G. Garcia, B. G. Olmedo, and R. G. Martin, “A time domain near-to-far field transformation for fdtd in two dimensions ,” Microwave and Opt. Tech. Lett., vol. 27, No. 6, pp. 427-432, 2000. [27] M. Fujita, K. Ishihara, T. Ueno, T. Asano, S. Noda, H. Ohata, T. Tsuji, H. Nakada, and N. Shimoji, “Optical and electrical characteristics of organic light-emitting diodes with two-dimensional photonic crystals in organic/electrode layers,” Jap. J. Appl. Phys., vol. 44, No. 6A, pp. 3669-3677, 2005. [28] A. Chutinan, K. Ishihara, T. Asano, M. Fujita, S. Noda, “Theoretical analysis on light-extraction efficiency of organic light-emitting diodes using FDTD and mode-expansion methods,” J. Orgel., vol. 91, pp. 3-9, 2004. [29] Hermann A. Haus, Waves and Fields in Optoelectronics, 1st ed. , Prentice-Hall, New Jersey, 1985. [30] J. D. Joannopoulos, R. D. Meade, and J. N. Winn,Photonic Crystals: Modeling the Flow of Light, 1st ed. , Princeton University Press, 1995. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/29799 | - |
| dc.description.abstract | 本論文發展了一套可以有彈性、有效率計算發光元件發光效率的方法。本方法
以有限時域差分法為主輔以傅式分析得到目標頻率的強度, 再將各個位置、各 個角度的能量加總得到進入空氣的總出光率。 發光二極體及有機發光二極體可能成為顯示及照明的主要元件之一, 然而發光 二極體和有機發光二極體都有發光效率低落的問題。有鑒於此, 本篇論文將焦 點放在發光二極體及有機發光二極體的模擬。我們採用的提高發光效率的方式 為在發光二極體及有機發光二極體中加入光子晶體。在參數範圍內進行掃描以 取得最佳情形的最佳出光率和出光率與各個參數間的關係, 以進一步了解各種 參數的影響及設計考量。 我門定義未加入光子晶體的結構為原始結構。先以最常見的方形結構來計算。 另外, 三角形結構、半圓形結構以及圓形結構也列入考慮。最後我們可以得到 在發光二極體中, 方形結構相對於原始結構可以得到三倍的出光率提升為最佳。 而在有機發光二極體中, 方形加平板的結構相對於原始結構可以得到三成的出 光率提升為最佳。 | zh_TW |
| dc.description.abstract | In this thesis, a flexible and efficient method to calculate light extraction
efficiency of light-emitting device is developed. This method is primarily based on finite-difference time-domain ( FDTD) method aided with Fourier analysis to obtain the intensity of the target frequency. Energy through all angles or positions is summed up to evaluate total extraction efficiency. LEDs ( light emitting diodes) and OLEDs ( organic light emitting diodes) might become one of the primary components in displays and lighting. However, both suffer low light extraction efficiency. Considering this issue, this thesis focuses on LED and OLED simulation. Photonic crystal is applied to LED and OLED for light extraction efficiency improvement. Numerous parameters are scanned within parameter bounds to evaluate the best case and the relationship between light extraction efficiency and each individual parameter, enabling us to understand effects of various parameters and design considerations. We define structure without photonic crystals an ”original structure.” The thesis starts with ordinary rectangular structure. Furthermore, triangular, semi-circle and circle structures are also taken into consideration. Finally, simulation results indicate that rectangular structure in LED offers an optimal improvement at three times of the light extraction efficiency compared with original structure, while rectangular structure combined with flat plate in OLED offers an optimal improvement of thirty percent in light extraction efficiency compared with original structure. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T01:19:21Z (GMT). No. of bitstreams: 1 ntu-96-R94941012-1.pdf: 2944555 bytes, checksum: 1a37238a52c80d976ee171b34588fecf (MD5) Previous issue date: 2007 | en |
| dc.description.tableofcontents | 1 簡介17
1.1 發光二極體簡介. . . . . . . . . . . . . . . . . . . . . . . 17 1.2 有機發光二極體簡介. . . . . . . . . . . . . . . . . . . . . 18 1.3 提升發光效率的理論基礎. . . . . . . . . . . . . . . . . . . 20 2 數值方法23 2.1 有限時域差分法. . . . . . . . . . . . . . . . . . . . . . . 23 2.2 金屬材料的計算. . . . . . . . . . . . . . . . . . . . . . . 29 2.3 吸收邊界條件. . . . . . . . . . . . . . . . . . . . . . . . . 32 2.4 傅式轉換. . . . . . . . . . . . . . . . . . . . . . . . . . . 33 2.5 遠場近似. . . . . . . . . . . . . . . . . . . . . . . . . . . 33 2.6 玻璃到空氣的穿透量計算. . . . . . . . . . . . . . . . . . . 35 3 二維數值模擬與結果36 3.1 LED模擬結構與結構參數介紹. . . . . . . . . . . . . . . . 36 3.2 OLED模擬結構與結構參數介紹. . . . . . . . . . . . . . . 36 3.3 LED模擬結果與討論. . . . . . . . . . . . . . . . . . . . . 43 3.4 OLED模擬結果與討論. . . . . . . . . . . . . . . . . . . . 56 4 有機發光二極體改良結構78 4.1 增加平板結構. . . . . . . . . . . . . . . . . . . . . . . . . 78 4.2 有機發光二極體平板結構與光子晶體結構結合. . . . . . . . 84 4.3 模擬結果與討論. . . . . . . . . . . . . . . . . . . . . . . 84 4.4 綜合討論. . . . . . . . . . . . . . . . . . . . . . . . . . . 107 5 結論115 參考文獻116 | |
| dc.language.iso | zh-TW | |
| dc.subject | 圓形結構 | zh_TW |
| dc.subject | 有機發光二極體 | zh_TW |
| dc.subject | 發光二極體 | zh_TW |
| dc.subject | 光子晶體 | zh_TW |
| dc.subject | 有限時域差分法 | zh_TW |
| dc.subject | 發光效率 | zh_TW |
| dc.subject | 方形結構 | zh_TW |
| dc.subject | 三角形結構 | zh_TW |
| dc.subject | 半圓形結構 | zh_TW |
| dc.subject | semi-circle structure | en |
| dc.subject | organic light emitting diode | en |
| dc.subject | Photonic crystal | en |
| dc.subject | finite difference time domain | en |
| dc.subject | light extraction efficiency | en |
| dc.subject | square structure | en |
| dc.subject | triangle structure | en |
| dc.subject | circle structure | en |
| dc.subject | light emitting diode | en |
| dc.title | 在發光二極體及有機發光二極體中加入光子晶體結構來增加
發光萃取效率的探討 | zh_TW |
| dc.title | Light-Extraction Enhancement of Light Emitting Diodes and
Organic Light Emitting Diodes by Photonic Crystal Structures | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 95-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 吳忠幟,林晃巖 | |
| dc.subject.keyword | 有機發光二極體,發光二極體,光子晶體,有限時域差分法,發光效率,方形結構,三角形結構,半圓形結構,圓形結構, | zh_TW |
| dc.subject.keyword | light emitting diode,organic light emitting diode,Photonic crystal,finite difference time domain,light extraction efficiency,square structure,triangle structure,semi-circle structure,circle structure, | en |
| dc.relation.page | 121 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2007-07-19 | |
| 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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|---|---|---|---|
| ntu-96-1.pdf 未授權公開取用 | 2.88 MB | Adobe PDF |
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