کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1556299 999182 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Crystalline Size Effects on Texture Coefficient, Electrical and Optical Properties of Sputter-deposited Ga-doped ZnO Thin Films
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد شیمی مواد
پیش نمایش صفحه اول مقاله
Crystalline Size Effects on Texture Coefficient, Electrical and Optical Properties of Sputter-deposited Ga-doped ZnO Thin Films
چکیده انگلیسی

C-axis oriented Ga-doped ZnO (GZO) films with various thicknesses were deposited on glass substrate by radio frequency (RF) magnetron sputtering. The dependence of crystal structure, electrical, and optical properties of the GZO films on crystalline size were systematically studied. The results showed that the texture coefficient of (002) peak (TC(002)) decreases with increasing crystalline size. The Hall mobility μ was reciprocal to electron effective mass and the fitted relaxation time τ   was 0.11 ± 0.01 μs. With the increase of average crystalline size, the resistivity increased slightly, which is caused by the competition of (002) and (101) plane, introducing in some defects and leading to carrier density reduction. The optical band gap was in the range from 3.454 to 3.319 eV with increasing crystalline size from 26.96 to 30.88 nm, showing a negative relationship. The dependence of optical band gap (Egop) on the crystalline size (R  ) can be qualitatively explained by a quantum confinement effect. The relationship between Egop and R of GZO films suggests that tuning up optical properties for desired applications can be achieved by controlling the crystalline size.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Science & Technology - Volume 31, Issue 2, February 2015, Pages 175–181
نویسندگان
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