P.115: Micropyramid Array with Antireflective Nanostructure Surfaces for Light Extraction Efficiency Enhancement of Organic Light Emitting Devices. Issue 1 (1st July 2013)

• Record Type: Journal Article
• Authors: Ho, Yu‐Hsuan; Tsai, Ming‐Chih; Fang, Jheng‐Hao; Ting, Kuan‐Han; Tian, Wei‐Cheng; Chang, Yia‐Chung; Wei, Pei‐Kuen
• Is Part Of: Digest of technical papers. Volume 44:Issue 1(2013)
• Page Start: 1417
• Page End: 1420
• Publication Date: 2013-07-01
• Subjects: Extraction efficiency enhancement -- nanoimprint technique -- graded antireflection; Information display systems -- Congresses; 621.3815422
• DOI: 10.1002/j.2168-0159.2013.tb06509.x
• Languages: English
• ISSNs: 0097-966X

Abstract

Abstract: A novel and efficient light extraction technique of OLEDs by attaching hierarchical micro‐pyramid array with antireflective nanostructures was demonstrated. The hierarchical micropyramid arrays were nanoimprinted on polycarbonate films by using silicon concave mold incorporated with micropyramid and nanoporous surface, which were made by alkaline texturing and nanoparticle‐catalyzed etching processes respectively. The additional antireflective nanostructures can effectively reduce the loss for the light normally incident at the inclined surface. After applying the subwavelength antireflective surface at the conventional micropyramids, the luminous efficiency enhancement was improved from 37.7% to 84.2%.