• 제목/요약/키워드: Advanced Technology

검색결과 26,469건 처리시간 0.045초

Failure Mode Analysis for Polymer EL Blue Devices' Lifetime

  • Kim, Mu-Gyeom;Kim, Sang-Yeol;Lee, Tae-Woo;Park, Sang-Hun;Park, Ju-Cheol;Park, Jong-Jin;Pu, Lyong-Sun
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
    • /
    • pp.1432-1435
    • /
    • 2005

  • We report failure mode observed in polymer EL blue devices, relating with life curve. The modes are analyzed by observing compositional and morphological variation using TEM-EDX, STM, and reverse engineering method as destructive ways, and also investigated mobility changes of hole and electron by measuring transient EL as a nondestructive way corresponding to life curve. We believe that the postulated failure modes in polymer EL devices can present right directions to obtain better performance, especially life time, of polymer devices in material and device structural designing points of view.

  • PDF

Crystallization behavior of a-Si film using UV pulsed laser

  • Kim, Do-Young;Park, Kyung-Bae;Kwon, Jang-Yeon;Jung, Ji-Sim;Xianyu, Wenxu;Park, Young-soo;Noguchi, Takashi
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2003년도 International Meeting on Information Display
    • /
    • pp.656-660
    • /
    • 2003

  • We studied the crystallization behavior of LP-CVD a-Si film using UV pulsed laser. With increase in the shot number of irradiation by fixing its energy density, poly-Si film having a large grain size of $0.5 {\mu}m$ was obtained. By analyzing the crystallized Si films using optical analysis such as Raman spectroscopy or AFM technique etc., conspicuous correlation between the grain size and the resultant film properties such as the stress or the roughness has been found. With the increase in the energy density or the shots number of laser, remarkable grain growth occurred following to the roughness formation corresponding to the increase in the tensile stress.

  • PDF

Advances in liquid crystalline nano-carbon materials: preparation of nano-carbon based lyotropic liquid crystal and their fabrication of nano-carbon fibers with liquid crystalline spinning

  • Choi, Yong-Mun;Jung, Jin;Hwang, Jun Yeon;Kim, Seung Min;Jeong, Hyeonsu;Ku, Bon-Cheol;Goh, Munju
    • Carbon letters
    • /
    • 제16권4호
    • /
    • pp.223-232
    • /
    • 2015

  • This review presents current progress in the preparation methods of liquid crystalline nano-carbon materials and the liquid crystalline spinning method for producing nano-carbon fibers. In particular, we focus on the fabrication of liquid crystalline carbon nanotubes by spinning from superacids, and the continuous production of macroscopic fiber from liquid crystalline graphene oxide.

  • https://doi.org/10.5714/CL.2015.16.4.223 인용 PDF KSCI KPUBS HTML

The Radiation Resistance Evaluation of Electrically Insulating Polymers

  • Lee, Dong-Hoon;Jung, Chan-Hee;Hwang, In-Tae;Choi, Jae-Hak;Im, Don-Sun;Kim, Ki-Yup;Nho, Young-Chang
    • 방사선산업학회지
    • /
    • 제5권3호
    • /
    • pp.237-242
    • /
    • 2011

  • In this research, the radiation resistance of ethylene propylene rubber (EPR) and chlorosulfonated polyethylene (CSPE) which can be used as a insulating materials of for electrical cable in the nuclear power plant were investigated. EPR and CSPE were irradiated by ${\gamma}$-ray at various doses ranging from 50 to 500 kGy at room temperature in air. The irradiated EPR and CSPE was investigated in terms of activation energy, mechanical properties, and oxidation stability. The experimental results revealed that CSPE exhibited the higher radiation resistance in comparison to that of EPR.