سنتز و بهبود ویژگی نورتابی نقاط کوانتومی هسته-پوسته CdTe/CdSe با استفاده از روش تابش امواج مایکروویو

نوع مقاله : مقاله پژوهشی

نویسندگان

1 فیزیک، علوم پایه، ولی عصر(عج)، رفسنجان،کرمان

2 فیزیک، علوم پایه، ولی عصر)عج(، رفسنجان،کرمان

چکیده

در این پژوهش، نقاط کوانتومی CdTe وCdTe/CdSe با استفاده از یک روش سریع تابش دهی امواج مایکروویو سنتز شده­اند. نقاط کوانتومی سنتز شده با آنالیزهای XRD،FESEM،EDS ، PL،UV-Vis  و RAMAN مورد بررسی قرار گرفته­اند. بررسی آنالیزهای ساختاریRAMAN ، XRD وEDS تشکیل موفق ساختار هسته-پوسته را تایید کرد. ساختار هسته-پوسته نقاط کوانتومی CdTe/CdSe از نوع ساختار هسته-پوسته نوعII  است. نقاط کوانتومی سنتزشده CdTe نورتابی لبه نواری با قله واقع در 535 نانومتر نشان دادند که پس از پوشیده شدن با پوسته CdSe شدت نورتابی آن افزایش چشم­گیری پیدا کرد و همچنین، قله نورتابی به دلیل تشکیل ساختار هسته-پوسته نوع II به سمت طول موج های بلندتر انتقال پیدا کرد. در این روش، ضخامت پوسته به راحتی و با مدت زمان تابشی مایکروویو در مرحله رشد پوسته قابل کنترل بود که منجر به تشکیل ذرات با نورتابی از گستره سبز تا قرمز شد.

کلیدواژه‌ها


عنوان مقاله [English]

Synthesis and improvement of the optical peroperties of CdTe/CdSe core-shell QDs by using microwave approach

نویسندگان [English]

  • Mahya Nozaei 1
  • mehdi Molaei 1
  • Farzad Farahmandzadeh 2
  • Bahareh Ramazanloo 1
1
2 physics, Faculty of Science,Vali-e-Asr University, Rafsanjan, Kerman
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