OLED light extraction film with inner nanostructure and outer microstructure
A technology of nanostructure and light extraction film, applied in nano optics, nanotechnology, nanotechnology, etc., can solve undesirable problems
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[0022] All parts, percentages, ratios, etc. in these examples are by weight unless otherwise indicated. Solvents and other reagents used were purchased from Sigma-Aldrich Chemical Company (Milwaukee, WI, USA) unless expressly stated differently.
[0023] Material
[0024] Accentrim is a UV curable resin blend available from 3M Company, St. Paul, MN, USA.
[0025] Alq is 8-hydroxyquinolinoaluminum, available from Sensient Imaging Technologies GmbH, Germany.
[0026] BEF2 is a brightness enhancement film available from 3M Company, St. Paul, Minnesota, USA.
[0027] BEF3 is a brightness enhancement film available from 3M Company, St. Paul, Minnesota, USA.
[0028] BS702 is a beaded gain diffuser film available from Kewia Inc., Osaka.
[0029] GG12 is a gain diffuser made according to US Patent Application No. 12 / 275631.
[0030]GD908 is a gain diffuser made according to Japanese Patent Application No. 2009-120416.
[0031] LGD is a microreplicated linear gain diffuser.
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example 1 to 9
[0033] For Examples 1 to 9, reference is made to OLED fabrication based on 2D photonic crystal nanostructured films.
[0034] PET-based 500-nm pitch 2D photonic crystal (PhC) nanostructured films were fabricated by sequential casting and curing (3C) repetitions from nanostructured tools fabricated by interference lithography, followed by high-refractive-index backfill coatings. The layer and cured layer are planarized as described in above-referenced US Patent Application No. 12 / 262393. Indium tin oxide (ITO) anodes were coated onto the backfilled nanostructured film via RF sputtering in a low-vacuum argon / oxygen environment to form about 120nm thick, resistivity in the range of 30-40Ω / □, and optical Films with medium to high to 80% transmittance across the visible spectrum. To reduce the water content in the PET base film, the ITO coated film was annealed at 80 °C for about 16 hours in an inert atmosphere
[0035] Immediately prior to OLED device fabrication, the ITO coat...
example 1-9
[0040] To simulate the performance of light extraction films with both internal nanostructured and external microstructured extractors, finished OLED devices built based on 2D nanostructured light extraction films were used as a reference for evaluating various external diffuser films. A series of external diffusers were laminated to three reference OLED devices (labeled Ref.1, Ref.2 and Ref.3) built on 2D PhC nanostructured films using Smart Gel OC-431A.
[0041] The angular luminance performance of the device was studied using two methods: (1) using a Photo Research PR650 photometric camera (available from Photo Research, Inc. (Chatsworth, CA, USA) with a manual rotation goniometer. Photo Research, Inc.)); and (2) conoscopic light using an Autronic conoscopic lens (available from Autronic-Melchers GmbH, Karlsruhe, Germany) test. For both goniometric and conoscopic measurements, the device operates at about 10 mA / cm 2 driven at a constant current density. The results are s...
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