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Polyimide as a Plastic Substrate for the Flexible Organic Electroluminescent Device

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Abstract

In this work, transparent flexible substrates based on polyimides(PI) with indium tin oxide (ITO) thin films for organic electroluminescent devices have been prepared. 2,2’-bis-(3,4- dicarboxyphenyl) hexafluoropropanedianhydride (6FDA) and 2,2’-bis-(trifluoromethyl)-4,4’- diaminobiphenyl (TFDB) PI films were used for transparent flexible substrates. ITO thin films were prepared at two substrate deposition temperatures of 25°C and 150°C with a typical radiofrequency (r.f.) planar magnetron sputtering system. The sheet resistance and the optical transmission properties of the fluorinated PI substrate were comparable with those for the slide glass substrate. The substrate properties are better when the deposition temperature is higher. SiO2 coating onto the fluorinated PI substrate by sol-gel reaction was also attempted to improve the optical transmission of the ITO/PI substrate. It was found that the coating of SiO2 affected on the morphology of the PI substrates.

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Acknowledgments

The work was supported by the National Research Laboratory Program, the Center for Integrated Molecular Systems, POSTECH, Korea and the Brain Korea 21 Project.

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Authors and Affiliations

  1. Department of Polymer Science and Engineering, Pusan National University, Busan, 609-735, Korea

    Jin-Woo Park, Youngkyoo Kim, Hyuntaek Lim, Cheol Min Bae, Il Kim, Shinji Ando & Chang-Sik Ha

  2. EXSS Group, Department of Physics, The Blackett Laboratory, Imperial College London, Prince Consort Road, London, SW7 2BW, UK

    Youngkyoo Kim

  3. Device Team, NESS Display Co., Ltd., Yongin, P.O.BOX 25, Kyoung Gi-Do, 449-860, Korea

    Hyuntaek Lim

  4. Department of Organic and Polymer Materials, Tokyo Institute of Technology, Ookayama, Meguro-Ku, Tokyo, 152-8552, Japan

    Shinji Ando

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  1. Jin-Woo Park
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  2. Youngkyoo Kim
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  3. Hyuntaek Lim
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  4. Cheol Min Bae
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  5. Il Kim
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  7. Chang-Sik Ha
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Park, JW., Kim, Y., Lim, H. et al. Polyimide as a Plastic Substrate for the Flexible Organic Electroluminescent Device. MRS Online Proceedings Library 814, 278–283 (2004). https://doi.org/10.1557/PROC-814-I7.6

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  • DOI: https://doi.org/10.1557/PROC-814-I7.6

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