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Efficient and bright non-doped blue light-emitting diodes based on glassy styrylcarbazoles

机译:基于玻璃态苯乙烯基咔唑的高效明亮的非掺杂蓝色发光二极管

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摘要

A series of styrylcarbzole fluorophores 9-Ethyl-3-{(E)-2-[4-(1,1,1-triphenylsilyl) phenyl]-l-ethenyl}-9H-carbazole (Cz-SiPh), {4-[2-(9-Ethyl-9H-carbazol-3-yl)-vinyl]-phenyl}-naphthalen-2-yl-phenyl-amine; Cz-NPh and 3-(2-Anthracen-9-yl-vinyl)-9-ethyl- 9H-carbazole (Cz-Ph3) were synthesized via Homer-Emmons-Wadsworth condensation. Fluorophores Cz-SiPh and Cz-NPh emit a blue hue, whereas Cz-Ph3 emits a green hue. Strong emission intensity, stable glassy morphology and blue emission from the solid film make fluorophores Cz-NPh and Cz-SiPh as promising blue emitters. Non-doped organic light emitting devices were fabricated using these fluorophores as an emitting layer directly; 1,3,5-tris (N-phenylbenzimidazol-2-yl)benzene and 4,4'-bis(N-naphth-l-yl-N-phenylamino)-biphenyl were used as the electron-transporting layer and the hole-injection layer, respectively. Among these devices, the Cz-NPh-based device exhibits excellent performance, including high brightness (8207 cd/m~2), large power efficiency (1.9 cd/A or 1.2 lm/W), high external quantum efficiency (2.3%), high color purity CIE (0.14, 0.09) and good operation stability.
机译:一系列苯乙烯基咔唑荧光团9-乙基-3-{(E)-2- [4-(1,1,1-三苯基甲硅烷基)苯基] -1-乙烯基} -9H-咔唑(Cz-SiPh),{4- [2-(9-乙基-9H-咔唑-3-基)-乙烯基]-苯基}-萘-2-基-苯胺;通过Homer-Emmons-Wadsworth缩合反应合成Cz-NPh和3-(2-蒽-9-乙烯基-乙烯基)-9-乙基-9H-咔唑(Cz-Ph3)。荧光团Cz-SiPh和Cz-NPh发出蓝色调,而Cz-Ph3发出绿色调。坚固的发射强度,稳定的玻璃态形态和固体膜发出的蓝色发射使荧光团Cz-NPh和Cz-SiPh成为有前途的蓝色发射器。直接使用这些荧光团作为发光层来制造非掺杂有机发光器件。 1,3,5-三(N-苯基苯并咪唑-2-基)苯和4,4'-双(N-萘-1-基-N-苯基氨基)-联苯用作电子传输层和空穴-注入层。在这些器件中,基于Cz-NPh的器件具有出色的性能,包括高亮度(8207 cd / m〜2),大功率效率(1.9 cd / A或1.2 lm / W),高外部量子效率(2.3%) ,高色纯度CIE(0.14,0.09)和良好的操作稳定性。

著录项

  • 来源
    《Thin Solid Films》 |2008年第12期|4145-4152|共8页
  • 作者单位

    Department of Applied Chemistry, National University of Kaohsiung, Kaohsiung, Taiwan 811, ROC;

    Department of Chemical Engineering, National Chung Hsing University, Taichung, Taiwan 402, ROC;

    Department of Chemical Engineering, National Chung Hsing University, Taichung, Taiwan 402, ROC;

    Department of Chemistry, Fu-Jen Catholic Univ., Taipei, Taiwan 242, ROC;

    Department of Chemical Engineering, National Yunlin University of Science & Technology.Taiwan 640, ROC;

    Department of Chemical Engineering, National Chung Hsing University, Taichung, Taiwan 402, ROC;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    OLED; styrylcarbzole fluorophores; electroluminescence; brightness; power efficiency; quantum efficiency;

    机译:OLED;苯乙烯基咔唑荧光团;电致发光亮度;电源效率;量子效率;

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