有機發光二極體具有高亮度、高對比、低操作電壓、可撓曲性等優點，被認為有潛力取代液晶，成為下一世代的平面顯示器新興應用技術。共軛有機高分子在製造上能以簡易的旋轉塗佈製程製造，大大降低成本，因此本論文希望將有機發光二極體發展製作成平面顯示器，藉由主動式的驅動電路，也就是利用二個有機薄膜電晶體再加上一個電容去整合有機發光二極體，完成所謂的2T1C驅動LED的主動式畫素。

我們使用P3HT當作有機電晶體的半導體層，並對P3HT電晶體做深入研究，希望能夠達到高mobility與高的ON/OFF ratio，來提升上述2T1C電路的工作效能。經過我們的努力，在場效載子遷移率(field-effect mobility：μFET)可以達到10-2cm2V-1s-1以上，而在ON/OFF ratio方面，也逐漸朝103的目標邁進，期望能夠在短時間內，將電晶體的特性做到最好，而應用在2T1C電路上面。

Organic light-emitting diodes (OLEDs) possess many advantages, such as higher brightness, high contrast ratio, low operation voltage, and flexibility. OLEDs are regarded potential to replace liquid crystal, and are promising technology in next-generation flat panel display. In this thesis, the fabrication of active matrix pixel, which consists of two transistors and one capacitance is studied.

We use P3HT as the polymeric semiconductor layer in our polymeric transistor, and we optimize the carrier mobility and ON/OFF ratio. We have successfully achieved a high value of mobility above 10-2 cm2V-1s-1, and a ON/OFF ratio is around 103. We believe, with continued studied, the active pixel can be commercialized.

參考文獻
【1】Z. Bao, A. Dodabalapur, A. J. Lovinger “Soluble and processable regioregular poly(3-hexylthiophene) for thin film field-effect transistor applications with high mobility” Appl. Phys. Lett. 69, 4108 (1996)
【2】H. Sirringhaus, P. J. Brown, R. H. Friend, M. M. Nielsen, K. Bechgaard, B. M. W. Langeveld-Voss, A. J. H. Spiering, R. A. J. Janssen, E.W. Meijer, P. Herwig, D. M. de Leeuw “Two-dimensional charge transport in self-organized, high-mobility conjugated polymers” Nature 401, 685 (1999)
【3】H. Sirringhaus, P. J. Brown, R. H. Friend, M. M. Nielsen, K. Bechgaard, B. M. W. Langeveld-Voss, A. J. H. Spiering, R. A. J. Janssen, E. W. Meijer “Microstructure-mobility correlation in self-organised, conjugated polymer field-effect transistors ” Synth. Met. 111–112, 129 (2000)
【4】B. Grevin, P. Rannou, R. Payerne, A. Pron, J. P. Travers ”Multi-scale scanning tunning microscopy imaging of self-organized regioregular poly(3-hexylthiophene) films” J. Chem. Phys. 118, 7097 (2003)
【5】B. Grevin, P. Rannou, R. Payerne, A. Pron, J. P. Travers ”Scanning Tunning Microscopy Investigations of Self-Organized Poly(3-hexylthiophene) Two-Dimensional Polycrystals” Adv. Mater. 15, 881 (2003)
【6】M. M. Ling and Z. Bao “Thin Film Deposition, Patterning, and Printing in Organic Thin Film Transistors” Chem. Mater. 16, 4284 (2004)
【7】H. Sirringhaus, N. Tessler, R. H. Friend ”Integrated Optoelectronic Devices Based on Conjugated Polymers” Science 280, 1741 (1998)
【8】H. Sirringhaus, N. Tessler, R. H. Friend ”Integrated, high-mobility polymer field-effect transistors driving polymer light-emitting diodes” Synth. Met. 102, 857 (1999)

【9】Y. Xu, D. Wu, Y. H. Sun, Z. H. Li, B. Z. Dong, Z. H. Wu “Comparative study on hydrophobic anti-reflective films from three kinds methyl-modified silica sols” J. Non-Cryst. Solids 351, 258(2005)
【10】G..Wang, T. Hirasa, D. Moses, A. J. Heeger “Fabrication of regioregular poly(3-hexylthiophene) field-effect transistors by dip-coating” Synth. Met. 146, 127 (2004)
【11】G..Wang, D. Moses, A. J. Heeger, H.-M. Zhang, M. Narasimhan, R. E. Demaray “Poly(3-hexylthiophene) field-effect transistors with high dielectric constant gate insulator” J. Appl. Phys. 95, 316 (2004)
【12】S. K. Park, Y. H. Kim, J. I. Han, D. G. Moon, W. K. Kim “High-Performance Polymer TFTs Printed on a Plastic Substrate” IEEE Trans. Electron. Devices ED-49, 2008 (2003)
【13】S. K. Park, Y. H. Kim, J. I. Han, D. G. Moon, W. K. Kim, M. G. Kwak “Electrical characteristics of poly(3-hexylthioohene) thin film transistors printed and spin-coated on a plastic substrates” Synth. Met. 139, 377 (2003)
【14】E. J. Meijer, C. Detcheverry, P. J. Baesjou, E. van Veenendaal, D. M. de Leeuw, T. M. Klapwijk “Dopant density determination in disordered organic field-effect transistors” J. Appl. Phys. 93, 4831 (2003)
【15】M. KITAMURA, T. IMADA, Y. ARAKAWA “Organic Transistor Circuits for Application to Organic Light-Emitting-Diode Displays” Jpn. J. Appl. Phys. 42, 2483 (2003)
【16】Z. L. Li, S. C. Yang, H. F. Meng, Y. S. Chen, Y. Z. Yang, C. H. Liu, S. F. Horng, C. S. Hsu, L. C. Chen, J. P. Hu, R. H. Lee “Patterning- free integration of polymer light-emitting diode and polymer transistor” Appl. Phys. Lett. 84, 3558 (2004)