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    National Tsing Hua University Institutional Repository > 電機資訊學院 > 電機工程學系 > 期刊論文 >  Large enhancement of inter-system crossing rate in polyfluorene by iridium-complex doping


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/71633


    Title: Large enhancement of inter-system crossing rate in polyfluorene by iridium-complex doping
    Authors: Hua-Hsien Liao;Chia-Ming Yang;Chi-Hua Wu;Sheng-Fu Horng;Wei-Shan Lee;Hsin-Fei Meng;Jow-Tsong Shy;Chain-Shu Hsu
    教師: 洪勝富
    Date: 2007
    Publisher: American Institute of Physics
    Relation: APPLIED PHYSICS LETTERS, American Institute of Physics, Volume 90, Issue 1, JAN 1 2007, Pages 013504
    Keywords: iridium compounds
    organometallic compounds
    polymers
    doping
    triplet state
    excitons
    spin-orbit interactions
    Abstract: Photoinduced absorption is used to study the intersystem crossing (ISC) rate of two polyfluorenes doped with iridium (III) tris[2-(4-totyl)pyridinato-N,C2]. It is found that the triplet exciton lifetime of polyfluorene is reduced by the dopants. But instead of decreasing, the population density of polyfluorene triplet exciton increases by almost one order of magnitude. The finding shows that the ISC rate can increase over 100 times due to the spin-orbital interaction with the Ir ion even though it is covered by the ligands. Specifically, the ISC lifetime changes from the intrinsic value of 62 ns to as short as 0.28 ns upon 10% doping.
    Relation Link: http://www.aip.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/71633
    Appears in Collections:[電機工程學系] 期刊論文

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