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长春理工大学 材料科学与工程学院,吉林 长春,130022
收稿日期:2009-12-03,
修回日期:1900-01-02,
网络出版日期:2010-04-30,
纸质出版日期:2010-04-30
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李启源, 魏长平, 孙小飞. Ag : ZnO/SiO2 复合薄膜的制备与光学性能[J]. 发光学报, 2010,31(2):230-234.
LI Qi-yuan, WEI Chang-ping, SUN Xiao-fei. Preparation and Optical Properties of Ag : ZnO/SiO2 Thin Composite Films[J]. Chinese journal of luminescence, 2010, 31(2): 230-234.
采用溶胶-凝胶法在玻璃衬底上制备Ag掺杂于ZnO层的Ag : ZnO/SiO
2
(AZSO)复合薄膜
采用XRD、SEM、UV-Vis和PL谱等手段对样品的晶体结构、微观形貌、透过率、吸收率及光致发光性能等进行表征
并观察了掺Ag量对复合薄膜光学性能的影响。XRD结果表明:样品经300 ℃退火处理后出现ZnO及单质Ag衍射峰;由SEM 结果可观察到AZSO复合薄膜颗粒分散均匀
表面致密
其断面照片显示了薄膜的双层结构。UV-Vis吸收光谱结果表明:随着复合薄膜中Ag含量的增加
Ag与ZnO之间的电子转移及Ag颗粒的变大促使Ag的特征吸收峰呈现红移和宽化
样品的透过率也随之降低
吸收边向短波长方向移动
禁带宽度减小。PL谱结果表明:由于Ag的掺入减少了ZnO内空穴浓度并对复合薄膜的结构缺陷进行补偿
以及Ag在440 nm附近的特征吸收
降低了复合薄膜的发光强度。
The thin Ag : ZnO/SiO
2
(AZSO)composite films with Ag doped in ZnO layer were deposited on glass substrates by means of sol-gel method. The crystal structure
microstructure
transmission
absorbance and photoluminescent properties of the samples were characterized by XRD
SEM
UV-Vis and PL
respectively. And the properties of thin composite films under the influence of different Ag contents were also discussed. The results of XRD indicated that there are diffraction peaks of ZnO and Ag after annealed in air at 300 ℃. The results of SEM showed that the film is uniformity and compact
and two-layer structure can be observed from the cross-sectional micrographs. The results of UV-Vis indicated that as the content of Ag increasing
the absorption peaks have red shift and widen because of the electron transfer between Ag and ZnO and the particle size of Ag becoming larger. The transmission of the thin composite films weakens as increasing the content of Ag
and optical absorption edges move to short wavelength. And band gaps of the composite films diminish
too. The PL spectra shows that photoluminescent intensity of the films in the section of ultraviolet and visible region weakens with increasing the content of Ag
this is owed to the reduction of the hole concentration and the compensation of structural defects caused by the doping of Ag and Ags absorption at 440 nm.
. Parmod S, Shishodia P K, Mehra R M, et al. Photoluminescence and absorption in sol-gel-derived ZnO films [J]. J. Lumin., 2007, 126 (2):800-806.
. Zerdali M, Hamzaoui S, Teherani F H, et al. Growth of ZnO thin film on SiO2/Si substrate by pulsed laser deposition and study of their physical properties [J]. Mater. Lett., 2006, 60 (4):504-508.
. Li Qiyuan, Wei Changping, Sun Xiaofei. Optical properties of ZnO/SiO2 composite film [J]. Chin. J. Lumin. (发光学报), 2009, 30 (3):385-388 (in Chinese).
. Gruzintsev A N, Volkov V T, Barthou C, et al. Stimulated emission from ZnO-SiO2-Si thin film nanoresonators obtained by magnetron sputtering method [J]. Thin Solid Films, 2004, 459 (1-2):262-266.
. Sahu D R. Studies on the properties of sputter-deposited Ag-doped ZnO films [J]. Microelectron J., 2007, 38 (12):1252-1256.
. Mie G. Beitrage zur optik truber medien, speziel kolloidaler metallosungen [J]. Ann. Phys., 1908, 330 (3):377-445.
. Yang Guang, Chen Zhenghao. Large optical nonlinearities in Ag-doped BaTiO3 nanocomposite films [J]. Acta Physica Sinica (物理学报), 2007, 56 (2):1182-1187 (in Chinese).
. Houng B, Huang C J. Structure and properties of Ag embedded aluminum doped ZnO nanocomposite thin films prepared through a sol-gel process [J]. Surf. Coat. Technol., 2006, 201 (6):3188-3192.
. Srinivasan G, Rajendra Kumar R T, Kumar J. Influence of post-deposition annealing on the structural and optical properties of ZnO thin films prepared by sol-gel and spin-coating method [J]. Opt. Mater., 2007, 30 (2):341-317.
. Kumar N, Kaur R, Mehra R M. Photoluminescence studies in sol-gel derived ZnO films [J]. J. Lumin., 2007, 126 (2):784-788.
. He X L,Wu J H, Wu L N, et al. Structure, morphology and optical properties of SiO2-x thin films prepared by plasma-assisted pulsed laser deposition [J]. Applied Surface Science, 2008, 254 (6):1730-1735.
. Duan L, Gao W, Chen R Q, et al. Influence of post-annealing conditions on properties of ZnO ∶ Ag films [J]. Solid State Communications, 2008, 145 (9):479-481.
. Deng R, Zou Y M, Tang H G. Correlation between electrical, optical properties and Ag+ contents of ZnO ∶ Ag thin films [J]. Phys. B, 2008, 403 (12):2004-2007.
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