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Journal of Nanostructures، جلد ۹، شماره ۱، صفحات ۱۲۴-۱۳۰
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عنوان انگلیسی Synthesis and characterization of transition metal doped ZnSe/ZnS nanocrystals by a rapid photochemical method
چکیده انگلیسی مقاله In the present work, a one pot, rapid and room temperature photochemical Synthesis of transition metal (TM; Cu, Mn, Cr)-doped ZnSe/ZnS core/shell nanocrystals (NCs) was reported. FT-IR spectrum confirmed the capping of ZnSe by thioglycolic acid. XRD and TEM analysis demonstrated zinc blende phase NCs with an average size of around 3 and 5 nm for TM:ZnSe and TM:ZnSe/ZnS NCs, respectively. PL spectra of ZnSe NCs showed a broad emission with two peaks located at 380 and 490 nm related to exitonic and trap states emission, respectively. For ZnSe:Cu NCs, exitonic emission disappeared completely and PL intensity of trap states emission increased. For ZnSe:Mn and ZnSe:Cr NCs, the exitonic emission decreased gradually with the increase in the impurity concentration whereas trap state emission increased. Moreover a peak about 580 nm was appeared from 4T1-6A1 transition of the Mn impurity. ZnS Shell increased photoluminescence and stability of all of TM-doped ZnSe NCs.
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نویسندگان مقاله AliReza Bahador |
Department of Physics, Faculty of Science, Vali-e-Asr University, Rafsanjan, Iran

Mehdi Molaei |
Department of Physics, Faculty of Science, Vali-e-Asr University, Rafsanjan, Iran

Masoud Karimipour |
Department of Physics, Faculty of Science, Vali-e-Asr University, Rafsanjan, Iran

نشانی اینترنتی http://jns.kashanu.ac.ir/article_87900_c44feaf68812cd0d2e99bcaf0e955975.pdf
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/497/article-497-1530960.pdf
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