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    National Tsing Hua University Institutional Repository > 工學院  > 材料科學工程學系 > 期刊論文 >  Efficient pure-white organic light-emitting diodes with a solution-processed, binary-host employing single emission layer


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/52395


    Title: Efficient pure-white organic light-emitting diodes with a solution-processed, binary-host employing single emission layer
    Authors: Jou,Jwo-Huei;Sun,Ming-Chen;Chou,Hung-Hsing;Li,Chien-Hung
    教師: 周卓輝
    Date: 2006
    Publisher: American Institute of Physics
    Relation: Applied Physics Letters , Volume 88 ,Issue 14, pp.88-90
    Keywords: Light emitting diodes
    Polymers
    Dyes
    Light emission
    Mixing
    Iridium compounds
    Abstract: Efficient white light-emitting diodes were fabricated with a solution-processed single emission layer composing a molecular and polymeric materials mixed binary host. The main host used was a molecule of 4, 4 prime -bis-(carbazol-9-yl) biphenyl and the assisting host used was a blue light-emitting polyfluorene-derived copolymer of poly[(9,9-dioctylfluo-renyl-2, 7-diyl)-alt-co-(9-hexyl-3,6-carbazole)]. The hosts were doped via solution-mixing a green dye of tris(2-phenylpyridine) iridium (III) and a red dye of bis[2- (2 prime -benzo-thienyl)-pyridi-nato- N, C3,] (acetylacetonate) iridium (III). One resultant device having a pure white emission of Commission Internationale de l'Eclairage (0.33, 0.33) has a maximum power efficiency of 4.2 lmW at 802 cd m2 and a maximum brightness of 11 800 cd m2. The better efficiency performance may be attributed to the addition of the assisting host, which halves the energy barrier for holes to inject into the light-emitting zone. © 2006 American Institute of Physics.
    URI: http://www.aip.org/
    http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/52395
    Appears in Collections:[材料科學工程學系] 期刊論文

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