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
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله

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 0.56Â 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 22Â nm. Optical band-gap is tuned between 3.22 and 3.15Â eV by increasing the Cd doping slightly which compares favorably well with earlier reports. The NBE emission in the ultraviolet at 386Â nm, from 0.51Â 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
Journal: Journal of Alloys and Compounds - Volume 706, 5 June 2017, Pages 438-446
نویسندگان
Nishant Kumar, Anchal Srivastava,