The visible luminescent characteristics of ZnO supported on SiO2 powder

	The visible luminescent characteristics of ZnO supported on SiO2 powder
	Chen, J; Feng, ZC; Ying, PL; Li, MJ; Han, B; Li, C
刊名	physical chemistry chemical physics
	2004
卷号	6 期号:18 页码:4473-4479
英文摘要	in situ laser-induced luminescence spectroscopy is used to study the visible luminescent characteristics of zno during the preparation process of zno supported on sio2 by the pyrolysis of different zn precursors in n-2 or o-2 atmosphere. the excitation source is 325 nm light, which is above the band gap (3.37 ev) of zno. in n-2 atmosphere, it is shown that green ( centered at ca. 520 nm), yellow ( centered at ca. 580 nm) and orange ( centered at ca. 640 nm) luminescence bands appear for zno produced from zinc acetate, zinc hydroxide and zinc nitrate, respectively. after these samples are treated by o2, green band is changed into yellow band and yellow band is changed into orange band. on the other hand, it is also found that the laser irradiation on the sample could alter the luminescent behavior of zno produced at the beginning decomposition temperature of the zn precursors. while this sample is irradiated, the orange band is gradually changed to a yellow band, the luminescent intensity finally increases more than 30 times that at the beginning of irradiation. however, irradiation hardly affects the luminescent properties of zno after calcination above 160 degreesc. the results indicate that the visible luminescence from zno is associated with the oxygen vacancies in zno, and the electronic state levels responsible for the visible luminescence bands are changing with the density of oxygen vacancies in zno. the green, yellow and orange bands are ascribed to the state of zno with high density of oxygen vacancies, with moderate density of oxygen vacancies and with less oxygen vacancies, respectively.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, physical ; physics, atomic, molecular & chemical
研究领域[WOS]	chemistry ; physics
关键词[WOS]	zinc-oxide ; spray-pyrolysis ; point-defects ; solar-cells ; thin-films ; surface ; photoluminescence ; oxygen ; green ; particles
收录类别	SCI
语种	英语
WOS记录号	WOS:000223679300015
公开日期	2015-11-10
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/139596]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Chen, J,Feng, ZC,Ying, PL,et al. The visible luminescent characteristics of ZnO supported on SiO2 powder[J]. physical chemistry chemical physics,2004,6(18):4473-4479.
APA	Chen, J,Feng, ZC,Ying, PL,Li, MJ,Han, B,&Li, C.(2004).The visible luminescent characteristics of ZnO supported on SiO2 powder.physical chemistry chemical physics,6(18),4473-4479.
MLA	Chen, J,et al."The visible luminescent characteristics of ZnO supported on SiO2 powder".physical chemistry chemical physics 6.18(2004):4473-4479.