BROWSE

Related Researcher

Author

Baik, Jeong Min
Nano Energy and Environmental Materials Lab
Research Interests
  • Nanogenerators, antimicrobial material, catalysis, smart sensors

ITEM VIEW & DOWNLOAD

Three-Dimensional Branched Nanowire Heterostructures as Efficient Light-Extraction Layer in Light-Emitting Diodes

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Three-Dimensional Branched Nanowire Heterostructures as Efficient Light-Extraction Layer in Light-Emitting Diodes
Author
Ye, Byeong UkKim, Buem JoonPark, JoonmoJeong, Hu YoungPark, Jae YongKim, Jong KyuHur, Jin-HoeKim, Myung HwaLee, Jong-LamBaik, Jeong Min
Keywords
3D branched nanowires; Hydrothermal growth; LEDs; Light emission; Oblique angle deposition
Issue Date
201406
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED FUNCTIONAL MATERIALS, v.24, no.22, pp.3384 - 3391
Abstract
A facile method to fabricate three-dimensional branched ZnO/MgO nanowire heterostructures and their application as the efficient light-extraction layer in light-emitting diodes are reported. The branched MgO nanowires are produced on the hydrothermally-grown ZnO nanowires with a small tapering angle towards the tip (≈6°), by the oblique angle flux incidence of MgO. The structural evolution during the growth verifies the formation of the MgO nanoscale islands with strong (111) preferred orientation on very thin (5-7 nm) MgO (110) layer. The MgO nanobranches, then grown on the islands, are polycrystalline consisting of many grains oriented in specific directions of <200> and <220>, supported by the nucleation theory. The LEDs with the branched ZnO/MgO nanowire arrays show a remarkable enhancement in the light output power by 21% compared with that of LEDs with pristine ZnO nanowires. Theoretical calculations using a finite-difference time-domain method reveal that the nanostructure is very effective in breaking the wave-guiding mode inside the ZnO nanowires, extracting more light especially in radial direction through the MgO nanobranches.
URI
Go to Link
DOI
http://dx.doi.org/10.1002/adfm.201303914
ISSN
1616-301X
Appears in Collections:
UCRF_Journal Papers
MSE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU