期刊
APPLIED SURFACE SCIENCE
卷 255, 期 9, 页码 4801-4805出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2008.11.091
关键词
Zinc oxide; Nanospheres; Photoluminescence; Annealing atmosphere; Surface states; Broad emission range
类别
资金
- Program for New Century Excellent Talents in University [NCET-04-0975]
- National Found for Fostering Talents of Basic Science [J0630313]
ZnO nanospheres were synthesized by a wet-chemical method. X-ray diffraction and. field-emission scanning electron microscopy confirmed the formation of wurtzite-structured ZnO with regular sphere shape. Two Raman modes located at 333 cm (1) and 437 cm (1) with two additional Raman humps centered at 577 cm (1) and 1077 cm (1) were observed. Photoluminescence spectra showed ultraviolet, green, orange and red emissions, which changed significantly after the samples were annealed in air, oxygen, argon and forming gas four different ambiences. All the evidence indicates that surface states are responsible to orange and red emissions in addition to excitonic recombination (3.18 eV) and oxygen vacancy (2.25 eV) emission. (C) 2008 Elsevier B. V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据