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首页> 外文期刊>Japanese journal of applied physics >Influence of polymeric electron injection layers on the electrical properties of solution-processed multilayered polymer light-emitting diodes
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Influence of polymeric electron injection layers on the electrical properties of solution-processed multilayered polymer light-emitting diodes

机译:高分子电子注入层对固溶多层高分子发光二极管电学性能的影响

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摘要

In this study, we fabricated multilayered polymer-based light-emitting diodes (pLEDs) with various solution-processed electron-injection layers (EILs), and investigated the influence of the EILs on the electrical properties of pLEDs in indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonic acid) (PEDOT: PSS)/poly[(9,9-dioctylfluorene-alt-(1,4-phenylene((4-sec-butylphenyl) amino)-1,4-phenylene))] (TFB) (HTL)/poly(9,9-dioctylfluorene-alt-1,4-benzothiadiazole) (F8BT) (EML)/EIL/Al structures. We have used the quaternized ammonium p-conjugated polyelectrolyte derivative (poly[(9,9-di(3,3$-N, N$-trimethylammonium) propylfluorenyl-2,7-diyl)-co-(1,4-phenylene)] diiodide salt) (PF-PDTA), a mixture of PF-PDTA and CS2CO3, and the aliphatic-amine-based polymer poly(ethylene imine) (PEI) as solution-processed EILs, and compared them with LiF as a solvent-free EIL. The EILs enhanced the electron injection and improve the pLED performance. High external quantum efficiencies of nearly 4% were obtained in the pLEDs with the combination of a multilayered structure fabricated by a transfer printing technique and EILs of a PF-PDTA: CS2CO3 mixture and PEI. On the other hand, the device with PF-PDTA exhibited lower efficiency, higher driving voltage, and larger leakage current at lower voltage. The migration of ionic charges was suggested from the abnormal dielectric behaviors, and serious damage on the electrode material occurred when both an acid hole-injection layer (PEDOT: PSS) and PF-PDTA were used. On the other hand, the pLEDs with ultrathin PEI showed high performance and stable device operation in terms of the influence of ionic charges. (C) 2016 The Japan Society of Applied Physics
机译:在这项研究中,我们制造了具有各种溶液处理的电子注入层(EIL)的多层聚合物基发光二极管(pLED),并研究了EIL对铟锡氧化物(ITO)中pLED的电性能的影响。 /掺有聚苯乙烯磺酸的聚(3,4-乙撑二氧噻吩)(PEDOT:PSS)/聚[(9,9-二辛基芴-alt-(1,4-亚苯基((4-仲丁基苯基)氨基) -1,4-亚苯基))](TFB)(HTL)/聚(9,9-二辛基芴-alt-1,4-苯并噻二唑)(F8BT)(EML)/ EIL / Al结构。我们已使用季铵化的p共轭聚电解质衍生物(聚[(9,9-二(3,3 $ -N,N $-三甲基铵)丙基芴基-2,7-二基)-共-(1,4-亚苯基)]二碘化物盐(PF-PDTA),PF-PDTA和CS2CO3的混合物以及脂族胺基聚合物聚(乙烯亚胺)(PEI)作为溶液处理的EIL,并将它们与LiF作溶剂进行比较无EIL。 EIL增强了电子注入并改善了pLED性能。在pLED中,通过转移印刷技术制造的多层结构与PF-PDTA:CS2CO3混合物和PEI的EIL相结合,获得了近4%的高外部量子效率。另一方面,具有PF-PDTA的器件表现出较低的效率,较高的驱动电压和较低电压下的较大泄漏电流。从异常的介电行为暗示离子电荷的迁移,并且当同时使用酸性空穴注入层(PEDOT:PSS)和PF-PDTA时,会对电极材料造成严重损坏。另一方面,就离子电荷的影响而言,具有超薄PEI的pLED表现出高性能和稳定的设备操作。 (C)2016年日本应用物理学会

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  • 来源
    《Japanese journal of applied physics》 |2016年第2s期|02BB16.1-02BB16.6|共6页
  • 作者

    Itoh Eiji; Kurami Kazuhiko;

  • 作者单位

    Shinshu Univ, Dept Elect & Elect Engn, Nagano 3808553, Japan;

    Shinshu Univ, Dept Elect & Elect Engn, Nagano 3808553, Japan;

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