藍光有機發光二極體最常被討論的問題是效率低且壽命較短，本論文採用三元單發光層結構，在此結構中包含客發光體Blue-D及三元主發光體材料SPPO13(2,7 Bis(diphenylphosphory l) 9,9' spirobifluorene)、 CzSi 9-( 4-tert-Butylphenyl)-3,6-bis(triphenylmethanealkyl)-9H-carbazole及 BAnF8Pye (1-(7-(9,9'-bianthracen-10-yl)-9,9-dioctyl-9H -fluoren-2-yl)pyrene).，而發光層包含Czsi之元件的電性有大幅的提升，在操作電壓6V時發光效率為5.9 cd/A，亮度為1017 cd//m2，析出結晶點也減少許多，壽命也有改善一些，但有色光偏移的現象，元件CIEx,y= (0.207,0.3609)且色光呈現藍綠色，因此後來採用昱鐳光電科技股份有限公司之藍螢光客發光體測試材料EB-N01，得到主波峰波長472 nm之元件且CIEx,y=(0.1652, 0.2871)，元件色光呈現天藍色，解決了色光偏移的現象。接著利用該材料混合綠螢光客發光體C545T，以調整兩種材料的比例以達到色光多元性的效果，實驗結果得到在CIEx,y=(0.1659, 0.2834)、CIEx,y=(0.2565, 0.6288)之間的多種色光之元件。

The blue OLEDs are consider as low efficiency and short lifetime. In this work, we focus on the blue OLEDs with ternary single emissive layer, consisting of a guest material Blue-D and host materials SPPO13(2,7 Bis(diphenylphosphory l) 9,9' spirobifluorene), Czsi 9-( 4-tert-Butylphenyl)-3,6-bis(triphenylmethanealkyl)-9H-carbazole and BAnF8Pye (1-(7-(9,9'-bianthracen-10-yl)-9,9-dioctyl-9H -fluoren-2-yl)pyrene). The device with CzSi in the emissive layer shown better performance. The current efficiency was 5.9 cd/A, and the luminance was 1017cd/m2 at applied voltage 6V with less precipitated crystallites. Furthermore, the lifetime was longer. However, there was still a problem of color shifting. The CIEx,y coordinates was (0.207 0.3609) and the color of devices was aquamarine. Therefore, the blue fluorescent guest material EB-N01 (e-Ray Optoelectronics Technology Co., Ltd.) was used to solve this problem. The peak wavelength of the electroluminescence spectrum of the device with EB-N01 was at 472 nm and the CIEx,y coordinates was (0.1652, 0.2871). The color of the devices looked like sky blue so there was no problem of color shiting.. Furthermore, we doped green fluorescent guest material C545T to realize multi-color devices, with CIEx,y coordinates between (0.1659, 0.2834) and (0.2565, 0.6288).

[1] M. Pope, H. P. Kallmann, and P. Magnante, J.Chem.Phys. 38, 2042, 1963.
[2] C. W. Tang, S. A. VanSlyke, and C. H. Chen, Appl. Phy. 65, 3610, 1989.
[3] J. H. Burroughes, D. D. C. Bradley, A. R. Brown, R. N. Marks, K. Mackay, R. H.
friend, P. L. Burns, and A. B. Holmes, Nature 347, 539, 1990.
[4] Yuto Tomita,「Alternative transparent electrodes for organic light emitting diodes」, Technische Universität Dresden, 博士論文, 2008.
[5] M.A. Baldo, D.F. O'Brien, M.E. Thompson, S.R. Forrest ,Phys Rev B, 60,
pp.14422–14428, 1999.
[6] M. Klessinger and J. Michl, VCH Publishers, New York, 1995.
[7] C. Adachi, M.A. Baldo, S.R. Forrest and R.C. Kwong, Appl. Phys. Lett. vol.78,no.11,p.1622, 2001.
[8] R. J. Holmes, B.W. D’Andrade, S. R. Forrest, X. Ren, J. Li, and M.E. Thompson, Appl. Phys. Lett. 83, 3818, 2003.
[9] C. L. Lee, K. B. Lee, J. J. Kim, Appl. Phys. Lett.77, 2280, 2000.
[10] V. Cleave, G. Yahiogulu, P.L. Barny, R.H. Friend, and N. Tessler, Adv. Mater. 11, 258, 1999.
[11] J. Kido, H. Haromichi, K. Hongawa, K. Nagai, and K. Okuyama, Appl. Phys. Lett. 65, 2124, 1994.
[12] M. Klessinger, J. Michl., VCH Publishers, 1995
[13] Vig, John R. Journal of Vacuum Science & Technology A 3.3, 1027-1034, 1985
[14]王文生，「偏極化高分子發光二極體之研究」，國立交通大學，碩士論文，
民國 95 年
[15] W.H. Kim, A. J. Mäkinen, N. Nikolov, R. Shashidhar, H. Kim, Z. H. Kafafi,
Appl. Phys. Lett. 80, 3844, 2002.
[16] Z. Zhu, Y. Bai, H.K. Hin, L.C Mu, T. Zhang, L. Zhang, J. Wang, H. Yan, S.K. So and S. Yang, Adv. Funct. Mater. 24, 7357–7365, 2014 .
[17] D. Liu, R.O. Orozco and T. Wang, PHYSICAL REVIEW E 88, 022601, 2013.
[18] Lan-Sheng Yang, Hsin-Fei Meng, Yu-Fan Chang, Cheng-Hsin Lien, Hsiao-Wen Zan, Sheng-Fu Horng, Lian Duan, Yong Qiu, C.W. Luo, “Stable and efficient blue fluorescent organic light-emitting diode by blade coating with or without electron-transport layer”, Elsevier Organic Electronics 51 6-15, 2017.
[19] 蘇効佐，「用多元主發光體材料改善有機發光二極體元件效率及壽命」，國立交通大學，碩士論文，民國107年
[20] Si-Yi Liao, Hsiao-Tso Su, Yung-Hung Hsiao, Yu-Fan Chang, Chiung-Wen Chang, Mu-Chun Niu, Hsin-Fei Meng, Chun Yen, Yu-Chiang Chao, Chih-Yu Chang, Hsiao-Wen Zan, Sheng-Fu Horng, “Leakage-free solution-processed organic lightemitting diode using a ternary host with singlediode emission area up to 6×11.5 cm2”, RSC Adv, 10584–10598, 2019.
[21] Hyeong Min Kim, Jeong Min Choi, Jun Yeob Lee, “Design of bicarbazole type host materials for long-term stability in blue phosphorescent organic light-emitting diodes”, Elsevier Organic Electronics 43 130-135, 2017.
[22] Yanan Li, Liang Zhou, Yunlong Jiang, Rongzhen Cui, Xuesen Zhao and Hongjie Zhang, “Technische Universität DresdenHigh performance pure blue organic fluorescent electroluminescent devices by utilizing a traditional electron transport material as the emitter”, RSC Adv 4219-4225, 2017.
[23] Xuesen Zhao, Liang Zhou, Yunlong Jiang, Rongzhen Cui, Yanan Li, Hongjie Zhang, “Efficient organic blue fluorescent light-emitting devices with improved carriers' balance on emitter molecules by constructing supplementary light-emitting layer”, Elsevier Dyes and Pigments 130 148-153, 2016.
[24] M . H Tsai, H . W Lin, H . C Su, T . H Ke, C C. Wu, F . C Fang, Y . L Liao, K . T . and C . I Wu , “Highly Efficient Organic Blue Electrophosphorescent Devices Basedon 3,6 Bis(triphenylsilyl)carbazoleas the Host Material”, Adv. Mater. 18, 1216 1220, 2006.
[25] 陳金鑫，黃孝文，「OLED 夢幻顯示器 OLED 材料與元件」，五南書局
[26] Jun-Yi Wu and Show-An Chen, “Development of a Highly Efficient Hybrid White Organic-Light- Emitting Diode with a Single Emission Layer by Solution Processing”, ACS Appl. Mater. Interfaces 10 4851−4859, 2018.