کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10714190 | 1025571 | 2012 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study on the structure and optical property of Zn1âxCuxO sol-gel thin films on quartz substrate
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
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چکیده انگلیسی
Zn1âxCuxO thin films (x=0, 1.0, 3.0, 5.0%) are prepared on quartz substrate by sol-gel method. The structure and morphology of the samples are investigated by X-ray diffraction (XRD) and atomic force microscopy (AFM). The results show that Cu ions were effectively penetrated into the ZnO crystal lattices with substitutional and interstitial impurities to form stable solid solutions without changing the polycrystalline wurtzite structure. Two peaks at 420Â nm (2.95Â eV, violet), 485Â nm (2.56Â eV, blue) have been observed from the photoluminescence (PL) spectra of the samples. It is concluded that the violet peak may correspond to the exciton emission; the blue emission corresponds to the electron transition from the bottom of the conduction band to the acceptor level of zinc vacancy. The optical test shows that the optical band gap Eg is decreased with the increase amount of Cu doping in ZnO. The band gap decrease from 3.40Â eV to 3.25Â eV gradually. It is also found that the transmission rate is increased rapidly with the increase of Cu ions concentration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 407, Issue 12, 15 June 2012, Pages 2254-2257
Journal: Physica B: Condensed Matter - Volume 407, Issue 12, 15 June 2012, Pages 2254-2257
نویسندگان
Yidong Zhang, Liwei Mi, Zhi Zheng,