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研究生: 陳映豪
Ying-Hao Chen
論文名稱: 高效率錯體有機發光二極體元件: 元件特性與操作壽命之探討
Highly efficient exciplex organic light-emitting devices: The investigation of the device performance and operational lifetime
指導教授: 李志堅
Chih-Chien Lee
口試委員: 李志堅
Chih-Chien Lee
范慶麟
Ching-Lin Fan
王煥宗
Huan-Chun Wang
劉舜維
Shun-Wei Liu
學位類別: 碩士
Master
系所名稱: 電資學院 - 光電工程研究所
Graduate Institute of Electro-Optical Engineering
論文出版年: 2017
畢業學年度: 105
語文別: 中文
論文頁數: 66
中文關鍵詞: 有機發光二極體激發錯合體熱活化延遲螢光反向系統間跨越元件壽命
外文關鍵詞: OLED, Exciplex, TADF, RISC, Lifetime
相關次數: 點閱:241下載:8
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  • 在本論文以carbazole結構之電子傳輸材料4,4’,4”-Tris(carbazol- 9-yl)triphe-
    nylamine ( TCTA )作為電子受體,以及以triazine結構之電洞傳輸材料2,4,6-tris(3-
    (1H-pyrazol-1-yl)phenyl)-1,3,5-triazine( 3P-T2T )作為電子施體,以共蒸鍍的方式混和兩種材料,使得在介面上產生高效率的激發錯合體形成,並從PL光譜證明激發錯合體的產生。
    接著在透過結構上的調變,分析結構對其效率之影響,並使載子達到平衡得到最佳的元件效率,而綜合了結構調變的實驗結果,最佳化元件在無摻雜材料下得到了10%外部量子效率,而摻雜入8%綠色磷光材料Ir(ppy)2(acac)則得到了29.6%的外部量子效率,以及在2000nits下T75得到了1400 min的高元件壽命。
    最後本論文從薄膜與材料端進行分析,證明了膜層的不穩定性與材料存在載子陷阱將影響元件的壽命。


    In this thesis, we use carbazole structure of 4,4’,4”-Tris(carbazol- 9-yl)triphe-
    nylamine ( TCTA ) as electron acceptor and triazine structure of the hole transport material 2,4,6-tris(3-(1H-pyrazol-1-yl)phenyl)-1,3,5-triazine( 3P-T2T ) as electronic donor. The two materials were mixed in a co-vapor deposition way to produce highly efficient excitation complexes on the interface, and the exciplex generation was proved by PL spectrum.
    We analyze the effect on the efficiency by changing the structure of the device to achieve the best efficiency with charge balance. The result of optimized device shows 10% and 29.6% external quantum efficiency with and without green phosphorescence material Ir(ppy)2(acac) and lifetime of ~1400 minutes with initial brightness of 2000 cd/m2.
    In conclusion, the analysis of films and materials show that the instability of the film and the existence of carrier traps will lead to the life of the devices

    總目錄 中文摘要 I ABSTRACT II 致謝 III 總目錄 IV 圖目錄 VII 第一章 緒論 1 前言 1 有機發光二極體發展歷史 2 第二章 文獻回顧 3 主體材料之材料性質 3 電子傳輸主體材料T2T、T3T與TST之材料性質與元件特性 4 電子傳輸主體材料3P-T2T、oCF3-T2T與3N-T2T之材料性質與元件特性 7 高效率有機激發錯合體之應用 10 研究動機 12 第三章 理論基礎 13 3-1 有機電致放光原理 13 3-2 電激發光機制 16 3-3 有機激發錯合體 17 3-4 元件發光效率 20 第四章 實驗架構 21 4-1實驗流程 21 4-1.1 基板清洗 21 4-1.2 真空熱蒸鍍製成 21 4-1.4黃光微影製程(Photolithography) 23 4-2實驗設備 25 4-2.1旋轉塗佈機 25 4-2.2材料純化系統 25 4-2.3曝光機 26 4-2.4超音波震盪器 26 4-2.5氮氣循環手套箱 27 4-2.6氧電漿機 28 4-2.7高真空熱蒸鍍機 29 4-2.8真空濺鍍機 31 4-3量測設備 32 4-3.1探針式膜厚量測儀 32 4-3.2橢圓偏振儀 32 4-3.3分光式輝度計 33 4-3.4原子力顯微鏡 33 4-3.5螢光光譜儀 33 4-4室溫濺鍍氧化銦錫基板 34 4-5材料介紹 37 4-5.1洞注入材料 37 4-5.2電洞傳輸材料 38 4-5.3放光材料 38 4-4.4電子注入材料 40 4-4.5陰極材料 40 第五章 結果與討論 41 5-1基礎元件光譜特性分析 41 5-2有機發光二極體元件結構 43 實驗一: 放光層主體與受體混和比例調變之元件特性 46 實驗三: 陽極基板調變之元件特性 52 實驗四: 磷光摻雜材料濃度調變之元件特性 54 5-4有機發光二極體壽命分析與討論 59 第六章 結論 62 參考文獻 63

    [1] J.-J. Lih and C.-F. Sung, "Full-color active-matrix OLED based on a-Si TFT technology," Journal of the Society for Information Display, 11, 617-620 (2003).
    [2] M. Kashiwabara, K. Hanawa, R. Asaki, I. Kobori, R. Matsuura, H. Yamada, T. Yamamoto, A. Ozawa, Y. Sato, S. Terada, J. Yamada, T. Sasaoka, S. Tamura and T. Urabe, "29.5L: Late-News Paper: Advanced AM-OLED Display Based on White Emitter with Microcavity Structure, " SID Symposium Digest of Technical Papers, 35, 1017 (2004).
    [3] G. He, M. Pfeiffer, K. Leo, M. Hofmann, J. Birnstock, R. Pudzich, and J. Salbeck, "High-efficiency and low-voltage p‐i‐n electrophosphorescent organic light-emitting diodes with double-emission layers," Applied Physics Letters, 85, 3911-3913 (2004).
    [4] T. Sasaoka, M. Sekiya, A. Yumoto, J. Yamada, T. Hirano, Y. Iwase, T. Yamada, T. Ishibashi, T. Mori, M. Asano, S. Tamura, and T. Urabe, "24.4L: Late-News Paper: A 13.0-inch AM-OLED Display with Top Emitting Structure and Adaptive Current Mode Programmed Pixel Circuit (TAC)," SID Symposium Digest of Technical Papers, 32, 384-387 (2001).
    [5] H. Sasabe, N. Toyota, H. Nakanishi, T. Ishizaka, Y. J. Pu, and J. Kido, "3,3'-Bicarbazole-based host materials for high-efficiency blue phosphorescent OLEDs with extremely low driving voltage," Adv Mater, 24, 3212-7 (2012).
    [6] A. B. Chwang, M. A. Rothman, S. Y. Mao, R. H. Hewitt, M. S. Weaver, J. A. Silvernail, K. Rajan, M. Hack, J. J. Brown, X. Chu, L. Moro, T. Krajewski, and N. Rutherford, "Thin film encapsulated flexible organic electroluminescent displays," Appl Physics Letters, 83, 413-415, 2003.
    [7] G. Destriau, J. chim. Phys, 33, 587 (1936).
    [8] M. Pope, H. P. Kallmann, and P. Magnante, "Electroluminescence in Organic Crystals, " The Journal of Chemical Physics, 38, 2042 (1963).
    [9] C. W. Tang and S. A. VanSlyke, "Organic electroluminescent diodes, " Appl. Phys. Lett, 51, 913 (1987).
    [10] H. F. Chen, S. J. Yang, Z. H. Tsai, W. Y. Huag, T. C. Wang, and K. T. Wang, "1,3,5-Triazine derivatives as new electron transport–type host materials for highly efficient green phosphorescent OLEDs," J. Mater. Chem, 19, 8112 (2009).
    [11] A. P. Kulkarni, C. J. Tonzola, A. Babel and S. A. Jenekhe, " Electron Transport Materials for Organic Light-Emitting Diodes," Chem. Mater., 16, 4556 (2004).
    [12] G. Hughes and M. R. Bryce, " Electron-transporting materials for organic electroluminescent and electrophosphorescent devices," J. Mater,Chem, 15, 94 (2005).
    [13] S.-J. Su, H. Sasabe, Y.-J. Pu, K. Nakayama and J. Kido, "Tuning Energy Levels of Electron-Transport Materials by Nitrogen Orientation for Electrophosphorescent Devices with an ‘Ideal’ Operating Voltage,"Adv. Mater, 22, 3311 (2010).
    [14] H. F. Chen, T. C. Wang, S. W. Lin, W. Y. Hung, H. C. Dai, H. C. Chiu, K. T. Wong, M. H. Ho, T. Y. Cho, C. W. Chen, and C. C. Lee, "Peripheral modification of 1,3,5-triazine based electron-transporting host materials for sky blue, green, yellow, red, and white electrophosphorescent devices," J. Mater. Chem, 22, 15620 (2012).
    [15] W. Y. Hung, G. C. Fang, Y. C. Chang, T. Y. Kuo, P. T. Chou, S. W. Lin, and K. T. Wang, "Highly Efficient Bilayer Interface Exciplex For Yellow Organic Light Emitting Diode," ACS. Appl. Mater. Interfaces, 5, 6526 (2013).
    [16] A. Endo, K. Sato, K. Yoshimura, T. Kai, A. Kawada, H. Miyazaki, and C. Adachi, " Efficient up-conversion of triplet excitons into a singlet state and its
    application for organic light emitting diodes,"Appl. Phys. Lett., 98, 083302 (2011).
    [17] S. Y. Lee, T. Yasuda, H. Nomura, C. Adachi, " High-efficiency organic light-emitting diodes utilizing thermally activated delayed fluorescence from triazine-based donor–acceptor hybrid molecules," Appl. Phys. Lett, 101, 093306 (2012).
    [18] Y. Sun, N. C. Giebink, H. Kanno, B. Ma, M. E. Thompson and S. R. Forrest, "Management of singlet and triplet excitons for efficient white organic light-emitting devices," Nature, 440, 908 (2006).
    [19] A. Endo, K. Sato, K. Yoshimura, T. Kai, A. Kawada, H. Miyazaki, and C. Adachi, "Efficient up-conversion of triplet excitons into a singlet state and its application for organic light emitting diodes," Applied Physics Letters, 98, 083302 (2011).
    [20] S. Youn Lee, T. Yasuda, H. Nomura, and C. Adachi, "High-efficiency organic light-emitting diodes utilizing thermally activated delayed fluorescence from triazine-based donor–acceptor hybrid molecules," Applied Physics Letters, 101, 093306 (2012).
    [21] H. Tanaka, K. Shizu, H. Miyazaki, and C. Adachi, "Efficient green thermally activated delayed fluorescence (TADF) from a phenoxazine-triphenyltriazine (PXZ-TRZ) derivative," Chemical Communications, 48, 11392 (2012).
    [22] T. Nakagawa, S.-Y. Ku, K.-T. Wong, and C. Adachi, "Electroluminescence based on thermally activated delayed fluorescence generated by a spirobifluorene donor-acceptor structure," Chemical Communications, 48, 9580-9582 (2012).
    [23] Q. S. Zhang, J. Li, K. Shizu, S. P. Huang, S. Hirata, H. Miyazaki, and C. Adachi, "Design of Efficient Thermally Activated Delayed Fluorescence Materials for Pure Blue Organic Light Emitting Diodes," Journal of the American Chemical Society, 134, 14706 (2012).
    [24] H. Uoyama, K. Goushi, K. Shizu, H. Nomura, and C. Adachi, "Highly efficient organic light-emitting diodes from delayed fluorescence," Nature, 492, 234 (2012).
    [25] K. Goushi, K. Yoshida, K. Sato,C. Adachi, "Organic light-emitting diodes employing efficient reverse intersystem crossing for triplet-to-singlet state conversion," Nature Photonics, 6, 253 (2012)
    [26] X. K. Liu, Z. Chen, C. J. Zheng, C. L. Liu, C. S. Lee, F. Li, X. M. Ou, and X. H. Zhang, "Prediction and design of efficient exciplex emitters for high-efficiency,thermally activated delayed-fluorescence organic light-emitting diodes," Advanced Materials, 27, 2378 (2015).
    [27] J. Li, H. Nomura, H. Miyazaki, C. Adachi, "Highly efficient exciplex organic light-emitting diodes incorporating a heptazine derivative as an electron acceptor," Chemical communications, 50, 6174 (2014)
    [28] W. Y. Hung, G. C. Fang, S. W. Lin, S. H. Cheng, K. T. Wong, T. Y. Kuo, P. T. Chou, Scientific Reports, 4, 5161 (2014)
    [29] S. E. Shaheen, G. E. Jabbour, M. M. Morrell, Y. Kawabe, B. Kippelen and N.Peyghambarian, "Bright blue organic light-emitting diode with improved color purity using a LiF/Al cathode, " J. Appl. Phys., 84, 2324 (1998).
    [30] P. A. Serena, J. M. Soler, and N. García, "Work function and image-plane position of metal surfaces," Phys. Rev. B, 37, 8701 (1988).
    [31] K. Seki, N. Hayashi, H. Oij, E. Ito, Y. Ouchi, H. Ishii, Thin Solid Films, 393, 298 (2001).
    [32] B. Zhao, T. Zhang, B. Chu1, W. Li1, Z. Su1, H. Wu, X. Yan, F. Jin, Y. Gao, and C. Liu, "Highly efficient red OLEDs using DCJTB as the dopant and delayed fluorescent exciplex as the host," Scientific Reports, 5, 10697 (2015).
    [33] Y. S. Park, S. Lee, K. H. Kim, S. Y. Kim, J. H. Lee, and J. J. Kim, “Exciplex-Forming Co-host for Organic Light-Emitting Diodes with Ultimate Efficiency,” Adv. Funct. Mater, 23, 4914 (2013).
    [34] K. H. Kim, C. K. Moon, J. H. Lee, S. Y. Kim, and J. J. Kim, "Highly Efficient Organic Light-Emitting Diodes with Phosphorescent Emitters Having High Quantum Yield and Horizontal Orientation of Transition Dipole Moments," Adv. Mater., 26, 3844 (2014).
    [35] T. Chiba, Y. J. Pu, R. Miyazaki, K. i. Nakayama, H. Sasabe,J. Kido, "Ultra-high efficiency by multiple emission from stacked organic light-emitting devices," Organic Electronics, 12, 710 (2011).
    [36] S. H. Choa, S. W. Pyob, M. C. Suha, "Low voltage top-emitting organic light emitting devices by using 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile," Synthetic Metals, 162, 402 (2012)

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