臺灣博碩士論文加值系統

有機發光二極體結合共振腔結構是種新的想法。可以利用白光有機發光二極體結合共振腔結構分別共振出紅、藍、綠三原色並且減少損耗和增加色純度。一般常見即利用上下金屬電極形成共振腔結構，由於金屬的吸收係數較大，以致於能量的損耗也相對提高。本論文採用布拉格反射鏡取代金屬反射鏡，由於布拉格反射鏡是由介電材料所堆疊而成，其吸收係數會比金屬反射鏡低，因此能量損耗將會相對減少，進而獲得較高的發光效率。本論文藉由控制ITO厚度來改變共振腔長度，即可分別獲得472nm、540nm、592nm三根主要peak。
本論文所使用的白光OLED效率為4.5cd/A，有了共振腔結構共振出的紅光效率提升到5.3cd/A，綠光則提升到5.9cd/A，藍光效率則提升到4.9cd/A。在操作電壓為6V時，其紅、藍、綠三原色色度座標分別為(0.507,0.388)、(0.268,0.139)、(0.301,0.638)。

Organic light-emitting diodes with microcavity structure is a new structure device. Red、Green and Blue light generated by white OLED with microcavity structure can reduce loss and improve the pure level of three primary color. In general, the microcavity structure was made up of two metal electrodes, the energy loss is higher as a result of the higher absorption coefficient. This research uses distributed bragg reflector to take the place of metal reflector is because of distributed bragg reflector is made up of dielectric material which has lower absorption coefficient than the metal reflector, hence, luminance efficiency can be promoted due to the lower energy loss. The cavity length can be changed by controlling the thickness of ITO, therefore, three primary peak 472nm、540nm、592nm can be generated.
In this paper, white OLED luminance efficiency is 4.5cd/A, along with microcavity structure, Red light luminance efficiency is 5.3cd/A, Green light luminance efficiency is 5.9cd/A and Blue light luminance efficiency is 4.9cd/A. The CIE coordinates are (0.507,0.388)、(0.268,0.139)、(0.301,0.638) at 6V.

中文摘要/Ⅰ
英文摘要/Ⅲ
目錄/Ⅴ
表目錄/Ⅶ
圖目錄/Ⅷ

第一章 簡介/1
1-1前言 /1
1-2 OLED全彩化法/3
1-3研究動機/6
第二章 原理/8
2-1有機發光二極體之操作原理/8
2-2布拉格反射鏡Distributed Bragg Reflector (DBR)/12
2-3 Fabry-Perot理論/15
2-4具共振腔結構有機發光二極體Resonant-Cavity Organic Light- Emitting Diode（RCOLED）之理論/19
2-5國際照明委員會(CIE)色度座標/21
第三章 製程簡介/22
3-1白光OLED結構/22
3-2白光OLED結合共振腔結構/26
3-3製程/28
3-4製程所需之設備及材料/33
第四章 元件特性量測/34
4-1布拉格反射鏡的製程條件以及量測/34
4-2白光OLED量測/38
4-3白光OLED結合共振腔共振出藍光的製程條件以及量測/43
4-4白光OLED結合共振腔共振出綠光的製程條件以及量測/49
4-5白光OLED結合共振腔共振出紅光的製程條件以及量測/55
4-6 Lifetime量測/61
第五章 結論/65
5-1結論/65

參考文獻/70

【1】 陳金鑫,OLED有機電激發光材料與元件,五南出版社,2006.
【2】J. Cao, X. Liu, M. A. Khan, W. Q. Zhu, X. Y. Jiang, Z. L. Zhang, and S. H. Xu, “RGB tricolor produced by white-based top-emitting organic light-emitting diodes with microcavity structure”, Current Applied Physics., 7, 300, 2007.
【3】Z. D. Popvic and H. Aziz, “Reliability and degradation of small molecule-basd organic light-rmitting devices”, IEEE J. Sel. Top. Quan. Electr., 8, 362, 2002.
【4】T. Ishida, H. Kobayashi, and Y. Nakato, “Structures and properties of electron-beam-evaporated indium tin oxide films as studied by x- ray photoelectron spectroscopy and work-function measurements”, J. Appl. Phys., 73, 4344, 1993.
【5】M. A. Martinez, J. Herrero, and M. T. Gutierrez, Thin Solid Films, 269, 80, 1995.
【6】N. Kikuchi, E. Kusano, E. Kishio, A. Kinabara, and H. Nanto, “Effects of excess oxygen introduced during sputter deposition on carrier mobility in as-deposited and postannealed indium–tin–oxide films”, J. Vac, Sci. Technol. A, 19, 1636, 2001.
【7】C. Shen, I. G. Hill, and A. Kahn, “Role of electrode contamination in electron injection at Mg:Ag/Alq3 interfaces”, Adv. Mater., 11, 1523, 1999.
【8】李正中,薄膜光學與鍍膜技術, 藝軒圖書出版社, 4th ed, 2004.
【9】Yariv, PHOTONICS, 6th ed, 2005.
【10】P. Schneeweiss, M. Sudzius, R. Gehlhaar, M. Hoffmann, V. G. Lyssenko, H. Fröb, and K. Leoa, “Observation of Kastler ring stimulated emission from an organic Microcavity”, Appl. Phys. Lett., 91, 051118, 2007.
【11】C. L. Lin, H. W. Lin, and C. C. Wua, “Examining microcavity organic light-emitting devices having two metal mirrors”, Appl. Phys. Lett., 87, 021101, 2005.
【12】X. W. Chen, C. H. Choy, and C. J. Liang, “Modifications of the exciton lifetime and internal quantum efficiency for organ c light-emitting devices with a weak/strong microcavity”, Appl. Phys. Lett., 91, 221112, 2007.
【13】M. Ishii, T. Mori, H. Fujikawa, S. Tokito, and Y. Taga, “Organic electroluminescent devices using alkaline-earth fluorides as an electron injection layer”, J. Lumin., 87, 1165, 2000.