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Fabrication of a microball lens array for OLEDs fabricated using a monolayer microsphere template

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Abstract

We report on a method for fabricating microball lens arrays with high outcoupling efficiency based on the replica molding process, which involves casting liquid polymethylmethacrylate (PMMA) into concave microball lens molds. Concave microball lens molds were fabricated by casting a poly-dimethyl-siloxane (PDMS) mixture onto a monolayer microsphere template, which was prepared by spin-coating an aqueous suspension of polystyrene spheres. Microball lenses were fabricated using microspheres with a diameter of 90 µm. After attaching the microball lens array to organic light-emitting diodes (OLEDs), the luminance was enhanced by approximately 108%.

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Authors and Affiliations

  1. Department of Electronics and Information Engineering, Soonchunhyang University, Asan, 336-745, Korea

    Hyun Soo Kim & Chang Kyo Kim

  2. Department of Material Science and Engineering, Seoul National University, Seoul, 151-742, Korea

    Ho Won Jang

Authors
  1. Hyun Soo Kim
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  2. Chang Kyo Kim
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  3. Ho Won Jang
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Correspondence to Chang Kyo Kim.

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Kim, H.S., Kim, C.K. & Jang, H.W. Fabrication of a microball lens array for OLEDs fabricated using a monolayer microsphere template. Electron. Mater. Lett. 9 (Suppl 1), 39–42 (2013). https://doi.org/10.1007/s13391-013-3174-3

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  • DOI: https://doi.org/10.1007/s13391-013-3174-3

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