کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9586213 1505939 2005 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Luminescence of excitons in mesoscopic ZnO particles
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Luminescence of excitons in mesoscopic ZnO particles
چکیده انگلیسی
Luminescence and time-resolved luminescence spectra of ZnO particles with the size of ∼20 nm have been investigated under band-to-band excitation. In the ultraviolet spectral region, there appear broad luminescence bands at 367.6, 368.8, 374.5 and 381.9 nm at 10 K. Decay profiles at 369 and 374 nm exhibit two decay components. The decay times are ∼20 and ∼100 ps for 369 nm, and ∼40 and ∼400 ps for 374 nm. These luminescence bands are attributable to the radiative recombination of free and bound excitons. Based on the present results, the effects of surface states and defects on excitons in mesoscopic ZnO particles have been discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 112, Issues 1–4, April 2005, Pages 196-199
نویسندگان
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