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Fabrication of a microball lens array for OLEDs fabricated using a monolayer microsphere template
- Authors
- Kim, Hyun Soo; Kim, Chang Kyo; Jang, Ho Won
- Issue Date
- Oct-2013
- Publisher
- 대한금속·재료학회
- Keywords
- microlens; microball lens; OLEDs; outcoupling
- Citation
- Electronic Materials Letters, v.9, pp 39 - 42
- Pages
- 4
- Journal Title
- Electronic Materials Letters
- Volume
- 9
- Start Page
- 39
- End Page
- 42
- ISSN
- 1738-8090
2093-6788
- 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 A mu m. After attaching the microball lens array to organic light-emitting diodes (OLEDs), the luminance was enhanced by approximately 108%.
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Related Researcher
- Kim, CHANG KYO
- College of Engineering (Department of Display and Electronic Information Engineering)