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Use of a New Blue Emitter in Color-Stable, Flexible, Polymeric White Light-Emitting Diodes with a Simple Structure

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Abstract

New, polymeric white light-emitting diodes with the structure ITO/PEDOT:PSS/BFE + MEH-PPV/Al have been fabricated, in which poly(9,9-dioctylfluorene-co-N,N′-di(phenyl)-N,N′-di(3-carboethoxyphenyl) benzidine (BFE) was used as the blue emitter host and poly [2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene vinylene (MEH-PPV) as the red emitter guest. A poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) layer was spin-coated as the hole-injection layer (HIL) on a flexible poly(ethylene terephthalate)/indium tin oxide (PET/ITO) substrate; the cathode was aluminium (Al). The entire simple, low-cost fabrication process was performed without any need for a glove box. The effect of PEDOT:PSS films prepared from the PEDOT:PSS/water solution with two different volume ratios (1:3 and 1:6) as the HIL on the lifetime and output performance of devices was investigated. The device fabricated by using the volume ratio 1:3 emitted white light with high color quality and Commission Internationale de l’Eclairage (CIE) coordinates of (0.34, 0.38), and had a long operating lifetime.

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Acknowledgements

The authors are grateful to the Council of the University of Kashan and to K.N. Toosi University of Technology for providing financial support to undertake this work.

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Authors and Affiliations

  1. Department of Chemical Engineering, University of Kashan, Kashan, Iran

    Mohsen Mohsennia

  2. Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, Iran

    Mohsen Mohsennia

  3. Department of Chemistry, University of Kashan, Kashan, Iran

    Maryam Massah Bidgoli

  4. Department of Electrical and Computer Engineering, K.N. Toosi University of Technology, Tehran, Iran

    Farhad Akbari Boroumand & Alireza Khademi

Authors
  1. Mohsen Mohsennia
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  2. Maryam Massah Bidgoli
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  3. Farhad Akbari Boroumand
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  4. Alireza Khademi
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Correspondence to Mohsen Mohsennia.

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Mohsennia, M., Bidgoli, M.M., Boroumand, .A. et al. Use of a New Blue Emitter in Color-Stable, Flexible, Polymeric White Light-Emitting Diodes with a Simple Structure. J. Electron. Mater. 44, 2745–2753 (2015). https://doi.org/10.1007/s11664-015-3771-z

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  • DOI: https://doi.org/10.1007/s11664-015-3771-z

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