کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1645684 1517288 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Core-size-dependent properties of CdSe/CdS core/shell QDs
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Core-size-dependent properties of CdSe/CdS core/shell QDs
چکیده انگلیسی

In this study, the core-size dependent optical properties of CdSe and its surface passivation effects are investigated. In order to evaluate the size-dependence of CdSe crystals, the synthesis temperatures are varied from 240 °C to 300 °C. The PL intensity of the synthesized CdSe QDs is increased by employing the core/shell structure, i.e., CdSe/CdS. It is can be explained by considering of the defect states passivation effects on the CdSe surface. Smaller-core quantum dots (QDs), which were synthesized at 240 °C, show effective photoluminescence enhancement and a stable core/shell structure. It is expected that the smaller QDs with a short wavelength are strongly affected by the shell due to the relatively unstable surface. Also, the thicknesses of shell on cores decide the phase information such as XRD patterns.


► In this study, we synthesized CdSe core and CdSe/CdS core/shell QDs using a colloidal solvent process.
► The manuscript reports that the core-size dependent optical properties of CdSe and its surface passivation effects are investigated.
► The smaller core QDs show effective PL enhancement and a stable core/shell structure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 99, 15 May 2013, Pages 14–17
نویسندگان
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