View : 16 Download: 0

Cost-efficient fabrication of UV/Vis nanowire (NW) photodiodes enabled by ZnO/Si radial heterojunction

Title
Cost-efficient fabrication of UV/Vis nanowire (NW) photodiodes enabled by ZnO/Si radial heterojunction
Authors
Um H.-D.Park K.-T.Jung J.-Y.Jee S.-W.Moiz S.A.Ahn C.H.Cho H.K.Lee E.Kim D.-W.Park Y.C.Yang J.M.Lim S.K.Lee J.-H.
Ewha Authors
김동욱
SCOPUS Author ID
김동욱scopus
Issue Date
2010
Journal Title
Technical Digest - International Electron Devices Meeting, IEDM
ISSN
0163-1918JCR Link
Citation
pp. 9.5.1 - 9.5.4
Indexed
SCOPUS scopus
Abstract
Radial heterojunction nanowires (NWs) using a ZnO(shell)/Si(core) coaxial structure are for the first time reported for a novel photodiode application. Strong antireflective characteristics are shown by employing vertically aligned Si NW arrays. A thin ZnO shell deposited onto a Si NW formed a radial junction which enabled effective separation of charge carriers. Furthermore, a ZnO nanostructure demonstrates a very high internal gain in photoconductivity due to the surface-enhanced electron-hole separation. The photodetection range, either ultraviolet (UV) or visible, can be determined by applying forward or reverse bias, respectively. Compared to a planar heterojunction photodiode, a photoresponsivity of the radial heterojunction structure shows similar values despite only ∼20% consumption of a ZnO thickness required for a planar junction. In addition, ∼2.5 times increase in UV responsivity is also presented using the radial heterojunction structure under the ZnO thickness same as a planar counterpart. Our coaxial ZnO/Si NW photodetectors suggest bright prospect for enhancing a photoresponsivity while less consuming ZnO via controlling the wired nanostructure. ©2010 IEEE.
DOI
10.1109/IEDM.2010.5703330
ISBN
9781424474196
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

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

BROWSE