大面積上發光元件與純刮刀製程有機發光元件之製程改進

Abstract

有機發光二極體（Organic Light-Emitting Diode，簡稱OLED）為近年來終極顯示器 及照明系統的熱門研究課題，其容易製作以及低驅動電壓即可達到不錯的放光效率與光 色等等好處，引起眾多學者及廠商的研究關注。在本論文中使用溶液製程製作有機層薄 膜，討論以鋁、鎳等不同金屬與金屬氧化物MoO3 做為陽極，並且使用導電度及透光度 均為金屬中最好的Ag 做為陰極的上發光元件特性。在主動層材料為Green-B 以及 Ir(mppy)3 等綠光元件中，得到了接近甚至超過使用同種有機材料以ITO 為陽極、LiF/Al 為陰極的下發光元件的效率以及亮度。在小面積0.2×0.2cm2 元件成功之後，我們進一步 有別於一般旋轉塗佈製程，使用刮刀塗佈成膜的方式成功製作了大面積2×3cm2 元件。 另一方面以純粹刮刀製程的方式製作ITO 下發光Ir(mppy)3 元件也得到不錯的效果，效 率可達28.7cd/A，證明了純刮刀製程的可行性。

Organic Light-Emitting Diodes (OLED) is the one of the hottest research topics about the best display and lighting systems recently. Because OLED that can be produced easily with low driving voltage can achieve high efficiency and soft lighting, many scholars and manufacturers are much concerned about that. In this thesis, organic thin film is made by solution-processed blade coating methods. We discuss the characteristics of top-emitting organic light-emitting devices using metals such as Al, Ni with metal oxide (MoO3) on those metals to be anodes and choose Ag that is the best among all metals on conductivity and transparency to be cathode. Top-emitting devices have better efficiency and brightness than bottom-emitting organic light-emitting devices with the same organic film (material for EML is Green-B or Ir(mppy)3, and ITO for anode, LiF/Al for cathode). After obtaining good performance for the small area devices (0.2×0.2cm2), we attempt to use blade coating process to manufacture (unlike traditional method with spin coating only) large-scale area devices III (2×3cm2) and obtain nice performance, too. On another topic for blade-only coating process, we manufacture every organic film with blade coating. The efficiency of 28.7cd/A is achieved for bottom-emitting devices (material for EML is Ir(mppy)3, and ITO for anode). This result shows that blade-only coating process may be a practical way to produce OLED/PLED.