کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1613007 | 1516308 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chemical states of gold doped in ZnO films and its effect on electrical and optical properties
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Gold-doped ZnO (ZnO:Au) films were grown on quartz substrates at room temperature by radio frequency magnetron sputtering technique and then annealed in the temperature ranging from 350 to 800 °C in argon ambience. It is found that the Au substitute for Zn in positive univalence (AuZn1+) in the as-grown ZnO:Au film. When the ZnO:Au is annealed above 600 °C, some of the AuZn1+ begin to precipitate from the ZnO:Au and become metal Au existing in the grain boundaries of the ZnO:Au, implying that the solid solubility of Au in ZnO decreases with increasing temperature. p-type conductivity is obtained in the ZnO:Au annealed at 350 °C, but the conductivity changes gradually from p-type to n-type with increasing annealing temperature. The optical band-gap of the ZnO:Au shows red-shift compared to undoped ZnO. The ZnO:Au shows room temperature photoluminescence (PL) quenching as annealed below 800 °C, but has two weak PL peaks, located at 2.417 and 3.299 eV, respectively, as annealed at 800 °C. The electrical and optical properties of the ZnO:Au are affected by the chemical states and content of the Au doped, and the mechanism of the effects are suggested in the present paper.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 585, 5 February 2014, Pages 479-484
Journal: Journal of Alloys and Compounds - Volume 585, 5 February 2014, Pages 479-484
نویسندگان
Y. Xu, B. Yao, Y.F. Li, Z.H. Ding, J.C. Li, H.Z. Wang, Z.Z. Zhang, L.G. Zhang, H.F. Zhao, D.Z. Shen,