有機發光二極體(Organic light-emitting Diode, OLED)為自發光(不需背光源) ，相對於薄膜電晶體-液晶顯示器(Thin Films Transistor-Liquid Crystal Display, TFT-LCD) 擁有許多光電特性的優勢。為了讓OLED達到全彩化平面顯示器的需求，高亮度、高效率、高色純度的RGB三原色，便成為OLED研究發展的重要課題。

在本實驗中所使用的主要材料有NPB、DPVBi、Alq3、LiF、PBD、DCJTB；其中NPB為電洞傳輸層、DPVBi為藍光發光層、Alq3為電子傳輸層、LiF為電子注入層、PBD為電洞阻擋層、DCJTB為紅光發光層，加入此層的目的是為了證明在NPB層及DPVBi層間的電洞阻擋效應。

短波長的藍光，在色轉換法(CCM)的全彩技術中扮演重要角色。因此本論文藉由調變各個有機材料層的厚度，研究改善藍光OLED的色純度；此外加入PBD做為電洞阻擋層，研究不同厚度的PBD層對元件的影響。為了改善元件混光的現象，加入一適當厚度的額外DPVBi層可以改善元件的藍光色純度及得到更窄的半高寬。

Organic light-emitting Diode (OLED) emits light itself. It owns many advantages of optical-electronic characteristics as compared with Thin Films Transistor-Liquid Crystal Display (TFT-LCD). In order to achieve the requirement for full color flat panel display, the three primary colors which are red, green, blue (R,G,B) with high luminance、high current efficiency、and high color purity are important study of research and development for OLED.
In our experiment, the major materials are NPB、DPVBi、Alq3、LiF、PBD、DCJTB；The materials of NPB、DPVBi、Alq3,LiF is used as hole transporting layer、blue emission layer、electron transporting layer, and electron injection layer, respectively. PBD is hole-blocking layer and DCJTB is red emission layer which is intended to indirectly demonstrate the hole-blocking effect in the interface between NPB and DPVBi layer.
The blue light emission with short wavelength plays an important role in color conversion method (CCM) of full color technology. In the study, we improve and research on color purity of blue OLED by various thicknesses of organic layer. In addition, we research the influence of the device with different thicknesses of PBD layer as hole-blocking layer. In order to improve the color mixing phenomenon, we add extra DPVBi layer to the device with PBD layer. It can improve the blue color purity and obtain narrower full width at half maximum (FWHM).

第一章 緒論 --------------------------------------1
Chapter 1 Introduction --------------------------------------------3
1-1 General Introduction----------------------------------------3
1-2 The History of organic light emitting diode-------------3
1-3 The Benefits of organic light emitting diode------------4
1-3-1 The Difficulty of organic light emitting diode--------------6
1-4 OLED Market Opportunity--------------------------------6
1-5 The motion and purpose of this deliberation------------7
第二章 有機發光二極體的背景理論-------------------9
Chapter 2 OLED Background Theory-----------------10
2-1 Theory of organic light emitting diode (OLED) ------10
2-2 Emission mechanism--------------------------------------10
2-2-1 Fluorescent Theory----------------------------------------11
2-3 Factors for the performance of OLEDs-----------------13
2-3-1 The OLED composite-------------------------------------13
2-4 The two forms of organic light emitting displays-passive
matrix and active matrix displays----------------------------19
2-5 The Full-Coror Technology of OLED------------------21
2-5-1 The introduction of full color technology-----------------22
2-5-2 The comparison with full color technology---------------24
2-6 Material technologies-------------------------------------24
2-7 OLED Structures------------------------------------------25
2-8 The measurement of characteristics for OLEDs------27
第三章 實驗步驟----------------------------------29
Chapter 3 Experiment procedure---------------------30
第四章 結果與討論--------------------------------32
Chapter 4 Result and Discussion----------------------33
4-1 The characteristics of various thicknesses of NPB layer for Blue OLEDs--------------------------------------------33
4-2 The characteristics of various thicknesses of Alq3 layer for Blue OLEDs--------------------------------------------35
4-3 The characteristics of various thicknesses of LiF layer for Blue OLEDs--------------------------------------------37
4-4 The characteristics of various thicknesses of DPVBi layer for Blue OLEDs-------------------------------------39
4-5 The characteristics of various thicknesses of DCJTB layer for Blue OLEDs-------------------------------------42
4-6 The characteristics of various thicknesses of PBD layer for Blue OLEDs--------------------------------------------44
4-7 The characteristics of devices with extra DPVBi layer for Blue OLEDs--------------------------------------------47
第五章 結論與未來工作----------------------------50
Chapter 5 Conclusion and Future Work---------------52
References------------------------------------------------------------54

[1] C.W. Tang, S.A. Vanslyke, Appl. Phys. Lett., 51 (1987), 913.
[2] C. Adachi, S. Tokito, T. Tsutsui, S. Saito, Jpn. J. Appl. Phys., 27 (1988), 713.
[3] T. Tsutsui, E. Aminaka, Y. Fujita, Y. Hamada, S. Saito, Synth. Met.,
55 (1993), 4157.
[4] J. Kido, H. Shionoya, K. Nagai, Appl. Phys. Lett., 67 (1995), 16.
[5] J. Kido, M. Kimura, K. Nagai, Science, 267 (1995), 1332.
[6] R.F. Service, Science, 273 (1996), 878.
[7] A. Bernanose, M. Comte, P. Vouaux, J. Chim. Phys., 50 (1953), 64.
[8] A. Bernanose, P. Vouaux, J. Chim. Phys., 50 (1953), 261.
[9] A. Bernanose, J. Chim. Phys., 52 (1955), 396.
[10] A. Bernanose, P. Vouaux, J. Chim. Phys., 52 (1955), 509.
[11] E. Gurnee, R. Fernandez, U.S. Patent 3,172 (1965), 862.
[12] H. Shirakawa, E. J. Louis, A. G. MacDiarmid, C. K. Chiang and A. J. Heeger,
J. Chem. Soc., Chem. Commun. 578 (1977).
[13] J. H. Burroughes, D. D. C. Bradley, A. R. Brown, R. N. Marks, K. Mackay, R. H. Friend, P. L. Burn, A. B. Holmes, Nature, 347 (1990), 539.
[14] J.R. Sheats, H. Antoniadis, M. Hueschen, W. Lenard, J. Miller,R. Mon, D.Roitman, A. Stocking, Science, 273 (1996), 884.
[15] R.H. Friend, R.W. Gymer, A.B. Holmes, J.H. Burroughes,
R.N. Marks, C. Taliani, D.D.C. Bradley, Nature, 397 (1999), 121.
[16] D. A. Pardo, G. E. Jabbour, N. Peyghambarian, Adv. Mater. 12, 17, 1249 (2000).
[17] O. Prache, Displays, Issue 2, 22 (2001), 49.
[18] Cambridge Display Technology, March 26, 2007.
[19] Electronic News, OLEDs Replacing LCDs in Mobile Phones, April 7 2005, retrieved on July 28 2007.
[20] Takenaka, Kiyoshi. "Sony to launch world's first OLED ultra-thin TV", Reuters, 2007-10-01. Retrieved on 2007-10-24.
[21] OLED-Info.com, Kodak Signs OLED Cross-License Agreement With LG Display, retrieved on March 14, 2008.
[22] iPO Reports - Gartner: Second Round of 10M 3G iPhones Possible.
[23] C. Hosokawa, M. Eida, M. Matsuura, K. Fukuoka, H. Nakamura, and T. Kusumoto, Synth. Met., 91(1997), 3.
[24] C.Hosokawa H. Higashi, H. Nakamura, and T. Kusumoto, Appl. Phys. Lett., 67 (1995), 3853.
[25] Z. Q. Gao, C. S. Lee, I. Bello, S. T. Lee, R. M. Chen, T. Y. Luh, J. Shi, C. W. Tang, Appl. Phys. Lett., 74 (1999), 865.
[26] Y. T. Tao, A. Danel, P. Tomasik, Appl. Phys. Lett., 77 (2000), 933.
[27] C. Adachi, S. Tokito, T. Tsutsui, S. Saito, Jpn. J. Appl. Phys., 27 (1988), 269.
[28] Y. Hamada, C. Adachi, T. Tsutsui, S. Saito, Jpn. J. Appl. Phys., 31, (1992), 1812.
[29] M. Era, C. Adachi, T. Tsutsui, S. Saito, Chem. Phys. Lett., 178 (1991),488.
[30] Yong Qiu, Yudi Gao, Peng Wei, Liduo Wang, Appl. Phys. Lett., 80 (2005), 2628
[31] Fangcong Wang, Su Liu, Chunlin Zhang, Microelectronics Journal, 38 (2007), 259
[32] Z. B Deng, X. M. Ding, L. S. Liao, X.Y. Hou, S.T. Lee, Displays, 21 (2000), 79.
[33] Zhang Zhi-feng, Deng Zhen-bo, Guo Dong, Liang Chun-jun, Lin Peng, Displays, 26 (2005), 133.
[34] Zhang Zhi-Feng, Deng Zhen-Bo, Liang Chun-Jun, Zhang Meng-Xin, Xu Deng-Hui, Displays, 24 (2003), 231
[35] Z. Y. Xie, L. S. Hung, and S. T. Lee, Appl. Phys. Lett., 79 (2001), 1048.
[36] Chuan-Cheng Tsou, Huei-Tzong Lu , Meiso Yokoyama, Journal of Crystal Growth, 289 (2006), 168.
[37] Gang Cheng, Yi Zhao, Feng Li, Wenfa Xie, Shiyong Liu, Thin Solid Films, 467 (2004), 231
[38] Dashan Qin, Ye Tao, J. Appl. Phys., 97 (2005) , 044505
[39] Huishan Yang, Yanwei Shi, Yi Zhao, Jingying Hou, Shiyong Liu, Journal of Luminescence, 127 (2007), 367.
[40] Huishan Yang, Yi Zhao, Jingying Hou, Shiyong Liu, Displays, 27 (2006), 183
[41] A. R. Brown, D. D. C. Bradley, J. H. Burroughes, R. H. Frienf, N. C. Greenam, P. L. Burn, A. B. Holmes, A. Kraft, Appl. Phys. Lett., 61 (1992), 2793.
[42] N. Von Malm, J. Steiger, R. Schmechel, H. Von Seggerm, J. Appl. Phys.,89 (2001), 5559.
[43] J. Pommerehne, H. Vestweber, Y. H. Tak, and H. Bassler, Synth. Met. 76 (1996), 654.
[44] C. F. Qiu, L. D.Wang, H. Y. Chen, M. Wong, H. S. Kwok, Appl. Phys. Lett. 79, 2276 (2001)
[45] S. Seki, Y. Sawada, T. Nishide, Thin Solid Films, 388 (2001), 22.
[46] T. Ishida, H. Kobayashi, Y. Nakato, J. Appl. Phys.,73 (1993) 4344.
[47] T. Futagami, Y. Shigesato, T. Yasui, Jpn. J. Appl.Phys. Part 1, 37 (1998), 6210.
[48] M. Bender, J. Trube, J. Stollenwerk, Appl. Phys. A, 69 (1999), 397.
[49] T. Maruyama, K. Fukui, Thin Solid Films, 203 (1991), 297.
[50] V. Vasu, A. Subrahmanyam, Thin Solid Films, 193/194 (1990), 696.
[51] M. Ishii, T. Mori, H. Fujikawa, S. Tokito, Y. Taga, Journal of Luminescence, 87 (2000), 1165.
[52] J. S. Kim, M. Gransrom, R. H. Friend, N. Johansson, W. R. Salaneck, R. Daik, W. J. Feast, F. Cacialli, Appl. Phys., 84 (1998), 6859.
[53] S. K. Sol, W. K. Choi, C. H. Cheng, L. M. Leung, C. F. Kwong, Appl. Phys. A, 68(1999), 447.
[54] M. G. Mason, L. S. Hung, C. W. Tang, S. T. Lee, K. W. Wang, J. Appl. Phys.,86 (1999), 1688.
[55] I. Min Chan, Tsung Yi Hsu, Franklin C. Hong, Appl. Phys. Lett., 81 (2002), 102.
[56] S. T. Lee, Z. Q. Gao, L. S. Hung, Appl. Phys. Lett., 75(1999), 1404.
[57] S. A. VanSlyke, C. H. Chen, C. W. Tang, Appl. Phys. Lett., 69 (1996), 2160.
[58] Y. Yang, A. J. Heeger, Appl. Phys. Lett., 64 (1994), 1245.
[59] A. Elschner, F. Bruder, H. W. Heuer, F. Jonas, A. Karbach, S. Kirchmeyer, S. Thurm, R. Wehrmann, Synth. Met., 111 (2000), 139.
[60] T. M. Brown, J. S. Kim, R. H. Friend, F. Cacialli, R. Daik, W. J. Feast, Appl. Phys. Lett., 75 (1999), 1679.
[61] S. E. Shaheen, G. E. Jabbour, M. M. Morrell, Y. Kawabe, B. Kippelen, N. Peyghambarian, M. F. Nabor, R. Schlaf, E. A. Mash, N. R. Armstrong, Appl. Phys. Lett., 84 (1998), 2324.
[62] J. D. Anderson, E. M. McDonald, P. A. Lee, M. L. Anderson, E. L. Ritchie, H. K. Hall, T. Hopkins, E. A. Mash. J. Wang, A. Padias, S. Thayumanavan, S. Barlow, S. R. Marder, G. E. Jabbour, S. Shaheen, B. Kippelen, N. Peyghambarian, R. M. Wightman, N. R. Armstrong, J. Am. Chem. Soc., 120 (1998), 9646.
[63] Ch. Jonda, A. B. R. Mayer, and W. Grothe, J. Appl. Phys., 85 (1999), 6884.
[64] L. S. Hung, C. W. Tang, M. G. Mason, Appl. Phys. Lett. 70 (1997), 152.
[65] G. E. Jabbour, B. Kippelen, N. R. Armstrong, N. Peyghambarian, Appl. Phys. Lett. 73 (1998), 1185.
[66] J. M. Bharathan, Y. Yang, J. Appl. Phys., 84 (1998), 3207.
[67]M. Stossel, J. Satudigel, F. Steuber, J. Simmer, A. Winnacke, Appl. Phys. A: Mater. Sci. Process. 68 (1999), 387.
[68] C. W. Tang, S. A. VanSlyke, C. H. Chen, J. Appl. Phys., 65 (1989), 3610.
[69] Z. B. Deng, X. M. Ding, S. T. Lee W. A. Gambling, Appl. Phys. Lett.,74 (1999), 2227.
[70] J. M. Zhao, S. T. Zhang, X. J. Wang, Y. Q. Zhan, X. Z. Wang, G. Y. Zhong, Z. J. Wang, X. M. Ding, W. Huang, X. Y. Hou, Appl. Phys. Lett., 84 (2003), 2913.
[71] S. Tokito, H. Tanaka, Y. Taga, Appl. Phys. Lett., 69 (1996), 878.
[72] Y. Sato, H. Kanai, Mol. Cryst. 253 (1994), 143.
[73] Universal Display: Passive-matrix OLED Displays.
[74] Universal Display: Active-matrix OLED Displays.
[75] T.Sasaoka et al., SID Digest, Vol.32, pp.384-387, June 2001.
[76] T.Tsujimura et al., SID Digest, Vol.34, pp.6-9, May 2003.
[77] F.Templier et al, IDMC2006 Digest, (2006), 1705.
[78] C. C. Wu, J. C. Sturm, R. A. R.egister, M. E. Thompson, Appl. Phys. Lett., 69 (1996), 3117.
[79] J. Bharathan, Y. Yang, Appl. Phys. Lett., 72 (1998), 2660.
[80] T. R. Hebner, C. C. Wu, D. Marcy, M. H. Lu, J. C. Sturm, Appl. Phys. Lett., 72 (1998), 519.
[81] G. Gustafsson, Y. Cao, G. M. Treacy, F. Klavetter, N. Colaneri, A. J. Heeger, Nature, 357 (1992), 477.
[82] W.Graupner et al., SPIE Proceedings 4207 (2000), 11.
[83] T.Sasaoka et al.,SID Digest, Vol.32, pp.384-387, June 2001
[84] Ta-Ya Chu, Szu-Yi Chen, Chao-Jung Chen, Jenn-Fang Chen and Chin H. Chen, Appl. Phys. Lett., 89 (2006), 053503.
[85] V. Bulovic, P. Tian, P. E. Burrows, M. R. Gokhale, S. R. Forrest, M. E. Thompson, Appl. Phys. Lett., 70 (1997), 2954.
[86] T. Dobbertin, O. Werner, J. Meyer, A. Kammoun, D. Schneider, T. Riedl, E. Becker, H. H. Johannes, W. Kowalsky, Appl. Phys. Lett., 83 (2003),5071.
[87] T. Miyashita, S. Naka, H. Okada, H. Onnagawa, Proceedings of IDW`04,p.1421,Dec. 8-10, 2004, Niigata, Japan.
[88] S. J. Kang, D. S. Park, S. Y. Kim, C. N. Whang, K. Jeong, S. Ima, Appl. Phys. Lett. 81 (2002), 2581.
[89] Haskal E I, Synth. Met., 91 (1997), 187.