Carbon film from carbonization of spin-cast polyacrylonitrile filmand patterned carbon film

carbon film;polyacrylonitrile;carbonization;imprinting;660

공과대학 화학생물공학부 ;

University:서울대학교 대학원

关键词: carbon film;    polyacrylonitrile;    carbonization;    imprinting;    660;   

Others  :  http://s-space.snu.ac.kr/bitstream/10371/127064/1/000000012868.pdf

美国|英语

来源: Seoul National University Open Repository

【 摘 要 】

Induim Tin Oxide (ITO) have used widely as a transparent electrode due to high electrical and optical properties. However, ITO on Earth is running out and shows brittle character, which restricts flexibility of the devices, so alternatives to the ITO have been researched. Especially, carbon materials attract researchers for excellent electrical, chemical, and mechanical properties. In this study, carbon film was achieved by two-step carbonization containing stabilization and further oxidation of spin-coated PAN film. PAN was used as a precursor due to low temperature processibility for obtaining poly-imine ladder polymers, which are necessary for carbonization. Stabilization was conducted either in air or under vacuum, and the carbon films from each condition were compared to each other. Finally, the structure, electrical and optical properties of the acquired carbon film were investigated. Furthermore, in order to increase optical property, patterning was introduced to the process. AAO by two-step anodization was used as a master mold and modified chemically. UV-curable PU-based polymer was used as a soft mold, which is replica of the master mold. The soft mold was also modified chemically to obtain anti-adhesion property and used as a stamp. Using this soft mold, nano-imprinting was carried out on spin-coated PAN film and porous carbon film was prepared by subsequent carbonization. This patterned carbon film was investigated about its morphology, electrical and optical properties. Since PAN is semicrystalline polymer, nano-imprinting of PAN was not achieved perfectly. The patterned carbon film did not deviate from the trends of the optical and electrical property of flat carbon film. While the carbon film cannot reach performance of the transparent electrode used in real industry, this study is helpful for research of carbon material or organic transparent, achieving the carbon electrode and patterned carbon electrode via simple process.