| 研究生: |
陳信宏 CHEN, SHINN-HORNG |
|---|---|
| 論文名稱: |
主鏈含孤立發光基團及對四聯苯高分子
的合成與光電性質 |
| 指導教授: |
陳雲
Chen, Yun |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 化學工程學系 Department of Chemical Engineering |
| 論文出版年: | 2002 |
| 畢業學年度: | 90 |
| 語文別: | 中文 |
| 論文頁數: | 124 |
| 中文關鍵詞: | 高分子發光二極體 |
| 外文關鍵詞: | PLED |
| 相關次數: | 點閱:111 下載:1 |
| 分享至: |
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高分子發光二極體(Polymer Light Emitting Diode, PLED)始於1990年英國劍橋大學Friend等人的研究,發現共軛高分子可做為發光二極體材料,從此開啟了高分子發光二極體的時代。
高分子發光二極體具備了自發光、高應答速度、視角廣、重量輕、可製作大面積等優點,應用於平面顯示器上極具潛力。
在元件的製作,高分子一般僅用來當作發光層(Emission Layer, EML),如在高分子的結構上導入電子、電洞傳遞基團,使發光層結合了電子傳遞層(Electron Transport Layer, ETL)、電洞傳遞層(Hole Transport Layer, HTL)的功能,如此可促進電子和電洞的注入,改善元件的特性。高分子結構上的發光基團若是孤立,可有效控制共軛長度和顏色的純度。
本研究合成主鏈含孤立發光基團的新型高分子,在結構上以含拉電子基的對四聯苯為電子傳遞單位,而發光基團為二苯乙烯衍生物,利用親核性取代反應合成聚芳香醚高分子。在物理性質方面,高分子P1~P4具有良好的熱穩定性和溶解度。在光學性質方面,P1~P4的螢光光譜皆有能量轉移的現象,發光波長是在藍光的範圍內。利用模式化合物(Model Compound)作能量轉移的討論,並比較小分子間和高分子能量轉移的差異。在電化學性質方面,利用氧化和還原起始電位分別求出高分子HOMO和LUMO能階,其中P1~P4的HOMO能階在-5.15 eV~ -5.25 eV間;LUMO能階在-3.36 eV~-3.40 eV之間。若將P2摻混於P1中(P1發藍光,P2發綠光),透過能量不完全轉移,可得到發光波長涵蓋了400 nm~600 nm的範圍,應用於摻混元件的製作上,可得到發綠光或白光的元件。
Since the discovery of electroluminescene(EL) in the poly(1,4-phenylenevinylene) (PPV) in 1990, EL conjugated polymers have attracted much interest in recent years because of their potential application in large-area flat panel displays.
Four novel poly(aryl ether)s (P1~P4) consisting of alternate isolated electron-transporting(quaterphenyl) and hole-transporting fluorophores (carbazole, fluorene)have been synthesized and characterized. These poly(aryl ether)s can be dissolved in organic solvents, and exhibited good thermal stability with 5% weight loss temperature above 500℃ in nitrogen atmosphere. The photoluminescent (PL) spectra of films of these polymers show maximum peaks at around 442-452 nm. The emission of the polymers was dominated by the fluorophores with longer emissive wavelength,3,6-bis(styryl)carbazole, 2,7-bis(styryl)fluorene segments via energy transfer from p-quaterphenyl. Therefore, the p-quaterphenyl segments function only as the electron-transporting/hole-blocking units in these polymers, and the other segments are the emissive centers and the hole-transporting units. The HOMO and LUMO levels of these polymers have been measured by cyclic voltammetry. The electron-donating nitrogen atom on carbazole resulted in the higher HOMO energy levels of P1 and P2. The single-layer light-emitting diodes of Al/P1~P4/ITO glass were fabricatedand their optoelectronic properties investigated. P1, P2 and P4 revealed blue electroluminescence, whereas P3 emitted yellow light due to the excimer formation. Moreover, blend of P1 and P2(a green-light polymer) emitted green light via completely energy transfer and white light via incomplete energy transfer.
[1] M. Pope , H. Kallmann, P. Magnante, J. Chem. Phys., 38, 2042 (1963).
[2] C. W. Tang , S. A.Vanslyke, Appl. Phys. Lett., 51, 913 (1987).
[3] J. H. Burroughes, D. D. C. Bradly, A. R. Brovn, R. N. Morks, K. Mackay, R. H. Friend, P. L. Burmond, A. B. Holmes, Nature, 374, 539 (1990).
[4] 翁文國;工業材料雜誌,第156期,P.75,民國88年12月.
[5] 翁文國;工業材料雜誌,第162期,P.75,,民國89年6月.
[6] 柯崇文, Chemistry, 60, 95 (2002)
[7] P. W. M. Blom, M. C. J. M. Vissenberg, Materials Science and Engineering, 27, 53 (2000).
[8] J.-S. Kim, K. H. H. Peter, C. E. Murphy, N. Baynes, R. H. Friend, Adv. Mater. , 3, 206 (2002).
[9] 陳存仁;工業材料雜誌,第160期,P.95,民國89年4月.
[10] Andersson et al, Macromolecules, 28, 7525 (1995).
[11] A. Kraft, A. C. Grimsdale, and A. B. Holmes, Angew : Chem. Int. Ed., 37, 402 (1998).
[12] J. L. Segura, Acta Polym., 49, 319 (1998).
[13] Q. Pei, Y. Yang, J. Am. Chem. Soc., 188, 7416 (1996)..
[14] Q. Pei, Y. Yang, J. Appl. Phys., 81, 3294 (1997).
[15] Y. Ohmori, M. Uchida, K. Muro, K. Yoshino, Jpn. J. Appl.Phys., 30, L1941 (1991)).
[16] K. Yoshida, A. Fujii, Y. Ohmori, K. Yoshino, Appl. Phys.Lett., 69, 734 (1996).
[17] M. Grell, X. Long, D. D. C. Bradley, M. Inbasekaran, E. P. Woo, Adv. Mater., 9, 798 (1997).
[18] M. Kreyenschmidt, G. Kla¨rner, T. Fuhrer, J. Ashenhurst, S. Karg, W. D. Chen, V. Y. Lee, J. C. Scott, R. D. Miller,Macromolecules, 31, 1099 (1998).
[19] M. Leclec, J. Polym. Sci., Part A: Polym. Chem., 39, 2867 (2001).
[20] D. B. Romero, M. Schaer, M. Leclerc, D. Ad’s, A. Siove, L. Zuppiroli, Synth. Met. , 80, 271 (1996).
[21] D. B. Romero, F. Nu¨esch, T. Benazzi, A. Siove, L. Zuppiroli,
Adv. Mater., 9, 1158 (1997).
[22] S. Maruyama, X. T. Tao, H. Hokari, T. Noh, Y. Zhang, T. Wada, H. Sasabe, H. Suzuki, T. Watanabe, S. Miyata, J. Mater. Chem., 9, 893 (1999).
[23] Z. Zhu, J. S. Moore, J. Org. Chem., 65, 116 ( 2000).
[24] I. Michael, W. Edmund, W. Weishi, B. Mark, W. Lisa, Synthetic Metals., 111, 397 (2000).
[25] D. M. Johansson, M. Theander, T. Granlund,, O. Ingana1, M. R. Andersson, Macromolecules, 34, 1981 (2001).
[26] S. O. Djobo, J. C. Berne¡de, S. Marsillac, Synthetic Metals., 122, 131 (2001).
[27] Y. Sakuratani, M. Asai, M. Tokita, S. Miyata, Synthetic metals., 123, 207 (2001).
[28] C.-W. Ko, Y.-T. Tao, J.-T. Lin, K. R. J. Thomas, Chem. Mater., 14, 357 ( 2002).
[29] D. A. Skoog, D. M. West, F. J. Holler, Fundamentals of Analytical Chemistry, 5th edition, Saunders College Publishing, 1988.
[30] N. J. Turro, Modern Molecular Photochemistry, Mill Valley, University Science Books, California, 1991, p17.
[31] E. Conwell, Trip., 5, 218-222 (1997).
[32] P. Schouwink, A. H. Schafer, C. Seidel, H. Fuchs, Thin Solid Films, 372, 163 (2000).
[33] R. Joseph, R. Lakowicz, Principles of Fluorescence Spectroscopy,
Kluwer Academic/Plenum Publishers, New York, 1999, p368.
[34] A. A. Lamola, N. J. Turro, Energy Transfer and Organic
Photochemistry, Wiley & Sons, New York, 1969, p17.
[35] T. Förster, Discuss Faraday Soc., 2 , 27 (1959),
[36] A. R. Buckley, M. D. Rahn, J. Hill, J. Cabanillas-Gonzalez, A.M. Fox, D.D.C. Bradley, Chemical Physics Letters, 339, 331 (2001).
[37] J.-I. Lee, I.-N. Kang, D.-H. Hwang, H.-K. Shim, Chem. Mater., 8, 1928 (1996).
[38] J.-W. Yu, J. K. Kim, H. N. Cho, D. Y. Kim, and C. Y. Kim, Macromolecules, 33, 5443 (2000)
[39] L. Ding, F. E. Karasz, L. Zhiqun, Z. Min, Macromolecules, 34, 9183 (2001)
[40] N. S. Cho, D.-H. Hwang, J.-I. Lee, B.-J. Jung, H.-K. Shim, Macromolecules, 35,1224 (2002) .
[41] J. Morgado, F. Cacialli, R.H. Friend, R. Iqbal, G. Yahioglu, L. R. Milgrom, S. C. Moratti, A. B. Holmes, Chemical Physics Letters, 325, 552 (2000).
[42] 戚務聖;光訊,第89期,P.11,民90年4月.
[43] J. F. Rusling, S. L. Suib, Adv. Mater., 12, 922 (1994).
[44] Y. Yang, E. Westerweel, C. Zhang, P. Smith, A. J. Heeger,
J. Appl. Phys., 77, 694 (1995)
[45] Q. Pei, G. Yu, C. Zhang, Y. Yang, A. J. Heeger, Science, 269, 1086(1995)
[46] S.-W. Hwang , Y. Chen, Macromolecules, 34, 2982 (2001).
[47] 黃孝文,”主鏈含孤立電子和電洞傳送性發光團之聚芳香醚的合
成與光電性質”, 國立成功大學化學工程研究所博士論文,民國90年.
[48] 楊豐瑜;化工資訊,第三期,P.18,2002.
[49] W. A. Herrmann, C.-P. Reisinger, Michael Spiegler, Journal of Organometallic Chemistry, 557, 93 (1998).
[50] J. P. Genet, M. Savignac, Journal of Organometallic Chemistry, 576 , 305 (1999)
[51] T. R. Manfred , B. Rolf, K. Wanninger, Tetrahedron Letters, 37, 4499 (1996).
[52] 廖麒貴,”主鏈含孤立發光基及噁二基高分子的合成及電化學
性質”, 國立成功大學化學工程研究所碩士論文,民國89年.
[53] I. D. Parker, J. Appl. Phys., 3, 1656 (1994).
[54] 許榮賓,”含發光基及噁二唑基高分子的合成與光電性質探討”, 國立成功大學化學工程研究所碩士論文,民國90年.