Fabrication of Photonic Crystal Structures on Flexible Organic Light-Emitting Diodes by Using Nano-Imprint Technology and PDMS Mold

• Main Authors: Ho, Ting-Lin, 何廷林
• Other Authors: Hsu, Quang-Cherng
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/74486135663738122974

碩士 === 國立高雄應用科技大學 === 機械與精密工程研究所 === 100 === With the advantages of high-resolution, simple process, low cost and mass production, nano-imprint lithography can be easily used to create micro and nano-structures, which is a promising process technology. Beside materials development, optical films and optical structure design are the possibilities to pursuit better efficiency of the optoelectronics components in recent years. Therefore, in this study, nano imprint lithography was used to create a photonic crystals structure film in organic light-emitting diode component, and then compare the efficiency of components whether with nano-structure or not. By using two different kinds of mold, such as silicon mold and PDMS mold, the nano structures in PMMA with molecular weight of 350K were fabricated. Nano structures in period of 403.53nm with silicon mold and nano structures in period of 385.64nm with PDMS mold as photonic crystal films were fabricated and were integrated into organic LED. From experiments, the organic LED without photonic crystal films behaves 193.3cd/m2 for luminous intensity, 3.481cd/A for lightening efficiency (L) and 0.781 lm/W for lightening power (P) where V is 14V and I is 5.5537mA; the organic LED with photonic crystal films behaves 241.6cd/m2 for luminous intensity, 4.173cd/A for lightening efficiency (L) and 0.936 lm/W for lightening power (P) where V is 14V and I is 5.7891mA, which shows that the latter perform well. Finally, a common commercially available flexible solar cells (Voc: 8V, Isc: 65mA) was used to drive light-emitting diode components in the ambient light environment. After providing three linked PV cells in series style, the developed OLED showed the driven trend; After providing four linked PV cells in series style, the OLED appeared apparent light source where the voltage is about 12.8V.