Open AccessThe structure and photoluminescence properties of ZnO/silicon nanoporous pillar array
Author(s) -
Yao Zhi-Tao,
Sun Xin-Rui,
Hui Xu,
Jiang Wei-Fen,
Xiao Shun-Hua,
Xinjian Li
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.6098
Subject(s) - photoluminescence , materials science , nanoporous , silicon , ultraviolet , chemical vapor deposition , crystallite , substrate (aquarium) , exciton , pillar , silicon oxide , optoelectronics , nanocomposite , chemical engineering , nanotechnology , condensed matter physics , oceanography , physics , silicon nitride , structural engineering , geology , engineering , metallurgy
Regularly arrayed nanocomposite system of zinc oxide/silicon nanoporous pillar array (ZnO/Si-NPA) was prepared by chemical vapor deposition utilizing Si-NPA as substrate, and the corresponding structure and photoluminescence properties were characterized. Our experimental results disclosed that all the pillars of ZnO/Si-NPA have a core-shell structure. Different from the red and blue emission from Si-NPA, two strong and wide emission bands were observed in the ultraviolet and blue-green ranges. These emission bands are attributed to the band-edge exciton transition of ZnO crystallites and two kinds of deep-level transitions originating from its intrinsic defects.