Synthesis and characterization of CdTe/CdSe core/shell nanoparticles with high emission from 570 to 610 nm

O. G.Rojas Valencia, J. L.Casas Espinola, M. Corea Tellez

Research output: Contribution to conferencePaper

1 Scopus citations

Abstract

© Published under licence by IOP Publishing Ltd. The paper presents the advance process of synthesis of CdTe/CdSe core/shell Quantum Dots (QDs) with emission wavelength from 570 to 610 nm. This synthesis was performed using modified Hot-Injection method. The CdTe/CdSe core-shell QDs have been characterized by the transmission electron microscopy (TEM) with the aim to control the QDs shape and the average size. The optical absorption and photoluminescence (PL) spectra are investigated in four samples obtained at different reaction times (5, 10, 15 and 20 s) of core growth after the CdSe passivation of the CdTe cores. Obtained results have shown that synthesized QDs have a good crystallinity, spherical shape and bright emission at 610 nm. The reaction time enlargement permits increasing the average size of CdTe/CdSe core-shell QDs, together with "red" shifting the PL wavelength and increasing the PL intensity. The advantages of synthesized CdTe/CdSe core/shell QDs are discussed.
Original languageAmerican English
DOIs
StatePublished - 17 Jun 2015
EventJournal of Physics: Conference Series -
Duration: 26 May 2017 → …

Conference

ConferenceJournal of Physics: Conference Series
Period26/05/17 → …

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