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We have developed the highly efficient OLEDs using the embossed glass substrate and the low yellowing TiO2/Epoxy nano composite layer. The nano composite can be applied to a scattering layer and a planarization layer on an embossed glass. The TiO2/Epoxy nano composite was effective for increasing the light extraction efficiency of OLEDs, however the yellowing degraded the luminous efficacy seriously...
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