کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5461232 1516188 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Faster photoresponse, enhanced photosensitivity and photoluminescence in nanocrystalline ZnO films suitably doped by Cd
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Faster photoresponse, enhanced photosensitivity and photoluminescence in nanocrystalline ZnO films suitably doped by Cd
چکیده انگلیسی
Faster photoresponse, enhanced photosensitivity and photoluminescence are obtained in Cd doped nanocrystalline ZnO films obtained by sol-gel method. The rise and decay times decrease for 0.56 at% Cd doping and the photosensitivity increases by approximately 20% rendering the sample very useful for switching and UV detector applications. Comparatively larger surface to volume ratio occurs for this sample. Consistent switching behavior is obtained throughout. The films are optically transparent with crystallite size less than 22 nm. Optical band-gap is tuned between 3.22 and 3.15 eV by increasing the Cd doping slightly which compares favorably well with earlier reports. The NBE emission in the ultraviolet at 386 nm, from 0.51 at% Cd doped sample, is remarkably good with suppressed defect-emissions and six-fold higher intensity as compared to that from undoped sample. The surface roughness decreases with increase in dopant concentration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 706, 5 June 2017, Pages 438-446
نویسندگان
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