Abstract
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.
| Translated title of the contribution | Síntesis y caracterización de nanopartículas core/shell de CdTe/CdSe con alta emisión de 570 a 610 nm |
|---|---|
| Original language | English |
| Article number | 012004 |
| Journal | Journal of Physics: Conference Series |
| Volume | 619 |
| Issue number | 1 |
| DOIs | |
| State | Published - 17 Jun 2015 |
| Event | 6th International Conference on Optical, Optoelectronic and Photonic Materials and Applications, ICOOPMA 2014 - Leeds, United Kingdom Duration: 27 Jul 2014 → 1 Aug 2014 |