本論文主要著重在具備新穎性之小分子材料的化學部分與元件應用的探討。主要可以分成四個部份，第一個部分針對鉑金屬錯合物容易產生Pt-Pt 作用力而造成效率不佳而進行分子上的修飾改良，其中以CzP-FPt 作為非摻雜元件時，可得到具有接近10 %的外部量子效率的結果。第二個部分設計新深藍色螢光客體材料，結合高量子效率的芘基團和具有電洞傳輸性的咔唑基團為主要設計概念，其中以tBuPhPCz 作為客體摻雜材料搭配mPPT 的CIE 座標可達到(0.15, 0.07)且外部量子效率5.2 %。第三部分則是結合咔唑基團和喹啉基團作為為主體設計一系列雙極性磷光主體材料，並利用合成方法修飾使其三重態能隙適用於綠橘紅三單色光，除具有不錯的外部量子效率結果之外，其中橘光和紅光以CzPPQ 為主體材料之T50 分別為26412 小時和18534 小時，都是以單一分子為主體材料所具有最佳的表現。第四部份則是以系統性的方式去探討電子予體和電子受體的比例同時也利用剛硬Cardo-type 使熱穩定性同時提高，其中電子予體和電子受體的比例為2:1 時，BCzIDQ 應用在綠橘紅三色光之最大外部量子效率分別為25.0、25.8 和24.3 %，同時T75 分別為1592、955 和92 小時。

The work presented here describes the chemistry and the device
applications of novel small-molecule-based materials. In the first part, FPt1-based devices were pronounced the self-quenching of the dimers to reduce external quantum efficiency. The CzP-FPt-based non-doped device showed a very promising external quantum efficiency of 10% which is nearly five times higher than that of the FPt1 control device. In the second part, we prepared series of PCz analogues which combines high-quantum-efficiency pyrene moiety and hole-transporting carbazole moiety served as deep-blue fluorescent dopants. The best performance of the mPPT-doping-tBuPhPCz device shows maximum EQE of 5.2 % with CIE coordinate (0.15, 0.07). In the third part, we report bipolar charge-transporting host materials, CzPPQ, which possesses electron-rich Carbazole moiety and electron-deficient quinoline moiety. The green,orange and red EL devices using CzPPQ analogues reached superior high EQE higher than that of the CBP-based device. For the orange EL devices, the operational lifetime of devices have 26412 hours @ 500 nits as Ir(pq)3 dopant and 18534 hours @ 500 nits as Ir(piq)3 dopant which was one molecule to achieve high performance. In the fourth part, we demonstrate systematic study on IDQ derivatives with different electron-rich moiety/electron-deficient moiety ratio and also increase good thermal stability due to their rigid cardo-linkage. We discovered the best performance of BCzIDQ-based device which showed Green, Orange,Red EL device with 25.0, 25.8 and 24.3 % of the EQE, respectively.

[1] P. E. Burrows, G. Gu, V. Bulovic, Zshen, S. R. Forrest, M. E. Thompson, IEEE Trans. Electron. Device 1997, 44, 11888.
[2] M. Stossel, J. S. Taudigel, F. Steuber, J. Simmerer, A. Winnacker, Appl. Phys. A 1999, 68, 387.
[3] P. Pope, H. P. Kallmann, P. Magnante, J. Chem. Phys. 1963, 38, 2402.
[4] C. W. Tang, S. A. VanSlyke, Appl. Phys. Lett. 1987, 51, 913.
[5] 審譯：林敬二, 林宗義, 儀器分析第四版, 1994, 上冊, 174.
[6] N. T. Kalyania, S. J. Dhobleb, Rene. Sust. Ener. Rev. 2012, 16, 2696.
[7] M. A. Baldo, D. F. O’Brien, Y. You, A. Shoustikov, S. Sibley, M. E. Thompson, S. R. Forrest, Nature 1998, 395, 151.
[8] M. -K. Wei, C. -W. Lin, C. -C. Y, Y. -W. Kiang, J. -H. Lee, H. -Y. Lin, Int. J. Mol. Sci. 2010, 11, 1527.
[9] Y. Tao, C. Yang, J. Qin, Chem. Soc. Rev. 2011, 40, 2943.
[10] R. Yang, R. Tian, J. Yan, Y. Zhang, J. Yang, Q. Hou, W. Yang, C. Zhang, Y. Cao, Macromolecules 2005, 38, 244.
[11] Q. Peng, E. T. Kang, K. G. Neoh, D. Xiao, D. Zou, J. Mater. Chem. 2006, 16, 376.
[12] G. Gu, D. Z. Garbuzov, P. E. Burrows, S. Venkatesh, S. R. Forrest, M. E. Thompson, Opt. Lett. 1997, 22, 396.
[13] T. Tsutsui, S. Satio, Intrinsically Conducting Polymer: An Emerging Technology, 1993.