کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
607403 1454579 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Photoluminescence investigation about zinc oxide with graphene oxide & reduced graphene oxide buffer layers
ترجمه فارسی عنوان
بررسی فوتولومینسانس در مورد اکسید روی با اکسید گرافین و کاهش لایه های بافر گرافین
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
چکیده انگلیسی


• PL from GO–ZnO and rGO–ZnO compositions was reported.
• Blue emission peak from these compositions is quenched.
• Yellow–orange emission peaks from these compositions are increased.
• PL mechanism in these compositions is proposed.

ZnO with graphene oxide (GO–ZnO) & reduced graphene oxide (rGO–ZnO) buffer layers were fabricated. Photoluminescence (PL) properties of GO–ZnO and rGO–ZnO compositions induced by oxygen vacancies defects were investigated using photoluminescence spectroscopy. The results showed that blue emission is quenched while yellow–orange emissions from GO–ZnO and rGO–ZnO compositions are significantly increased as compared to that of ZnO films. In stark contrast to enhanced yellow–orange emissions, PL spectra show three sharp, discrete emissions that characterize the dominant optical active defect, which is the oxygen vacancies and extended oxygen vacancies. Our results highlight the ability of GO & rGO buffer layers to modulate defect concentrations in ZnO and contribute to understanding the optical properties of deep-level defects, which is significant for development of long-wavelength photoelectric devices related with graphene materials.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 416, 15 February 2014, Pages 289–293
نویسندگان
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