Open AccessMorphology Effect of the ZnO Surface via Organic Etchants for Photon Extraction in III-Nitride Emitters
Author(s) -
Semi Oh,
S. Kim,
Seokhee Shin,
PeiChen Su,
YongJin Yoon,
Ki-nam Lee,
S.-J. Kim,
HeeJung Choi,
S.-J. Park,
K.-K. Kim
Publication year - 2016
Publication title -
ecs journal of solid state science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.488
H-Index - 51
eISSN - 2162-8777
pISSN - 2162-8769
DOI - 10.1149/2.0131701jss
Subject(s) - materials science , nanorod , oxalic acid , formic acid , citric acid , layer (electronics) , extraction (chemistry) , morphology (biology) , transmittance , chemical engineering , nitride , optoelectronics , nanotechnology , inorganic chemistry , organic chemistry , chemistry , engineering , biology , genetics
We demonstrate that the morphology effect on the ZnO surface using organic acids significantly improves the photon extraction efficiency of III-nitride emitters. Oxalic (C2H2O4), citric (C6H8O7), and formic (CH2O2) acids were used for modulating the nanostructured surface of the ZnO layer with various shapes, including random nanoblocks, nanoholes, and nanorods. The transmittance of the nanostructured ZnO layer fabricated with formic acid for 3 min was 91% at 450 nm wavelength. The optical output power intensities of the emitters with the nanostructured ZnO surface layer were enhanced by 22.14%, 30.58%, and 22.46% with oxalic, formic, and citric acid, respectively, compared with the emitter with the flat ZnO layer.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom