Study of quantum size effects and optical characteristics in colloidal Cd۱-xSnxTe quantum dotes
Publish place: International Journal of Nano Dimension، Vol: 5، Issue: 1
Publish Year: 1393
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJND-5-1_008
تاریخ نمایه سازی: 24 تیر 1401
Abstract:
In this work, we report, optical properties of Cd۱-xSnxTe quantum dots (x= ۰.۰۵, ۰.۱۰ and ۰.۱۵) synthesized in water using thioglycolic acid (TGA) as a modifier agent. The optical characterization of the samples was performed through absorption (UV) and photoluminescence spectra (PL). A red shift absorption and fluorescent emission peaks was observed which can be related to the increase of nanocrystals diameter with pass the reaction time. This size dependent phenomenon is concerned to the known “quantum confinement” effect and the highest quantum yield has been achieved under our experimental conditions (using thioglycolic acid (TGA) as a modifier agent) when the processing time reached to ۱۵۰ min.
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Authors
M. Seyedsadjadi
Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, ۱۴۷۷۸۹۲۸۵۵ Iran.
F. Asgari
Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, ۱۴۷۷۸۹۲۸۵۵ Iran.
N. Farhadyar
Department of Chemistry, Varamin –Pishva Branch, Islamic Azad University, Varamin, Iran.
N. Molahasani
Department of Chemistry, Tehran Shargh (Qiamdasht) Branch, Islamic Azad University, Tehran, Iran.