由於有機發光二極體有許多天生的優勢,例如容易製造、低成本、廣視角、低能量消耗和高亮度,所以已經被廣泛的應用在顯示器或是照明的用途上。而有機發光二極體是多層模構造,因此對於有機薄膜的研究是對有機發光二極體效能提升的根本方法。由於對有機材料在基板表面上的成長與其效能有很大關係,因此,在本論文中,我們使用中央研究院物理研究所的穿隧式電子顯微鏡輔以歐傑電子能譜以及低能量電子繞射儀,來研究有機材料在半導體矽表面的成長情形。此外,還使用光電子光譜學來研究其光電特性。並對有機材料的生長情形作出推論與分析。 我們針對電洞傳輸層的常見材料NPB進行一系列研究,發現其在矽(111)-7×7表面上形成相當特別的排列,頗有研究價值。
Because of the advantages, easy fabrication process, low cost, wide viewing angle, low power consumption and high brightness, OLED has played an important role in display technology. Since the multilayer construction of OLED, we focus on the organic thin film research. In this thesis, we successfully investigate the organic materials growing on Si(111)-7×7 surface with scanning tunneling microscopy, low energy electron diffraction and Auger election in Institute of Physics in Academia Sinica. Besides, we use ultraviolet photoemission spectroscopy to measure the unoccupied states of the materials. Therefore, we discuss the growing of the materials. A series of researches on hole transport material NPB have been studied, and we found that it can form some special arrays.