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P.115: Micropyramid Array with Antireflective Nanostructure Surfaces for Light Extraction Efficiency Enhancement of Organic Light Emitting Devices
Author(s) -
Ho YuHsuan,
Tsai MingChih,
Fang JhengHao,
Ting KuanHan,
Tian WeiCheng,
Chang YiaChung,
Wei PeiKuen
Publication year - 2013
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/j.2168-0159.2013.tb06509.x
Subject(s) - anti reflective coating , materials science , nanoporous , nanostructure , optoelectronics , oled , etching (microfabrication) , nanotechnology , coating , layer (electronics)
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%.