This paper studies synthesis of ZnSe quantum dots (QDs) doped with Cu ion in an aqueous solution by using 3-mercaptopropionic acid (MPA) as ligand, and then modified its surface by ZnTe (ZnSe:Cu/ZnTe). The structure, morphology and optical properties of QDs are characterized with X-ray diffraction (XRD), high resolution transmission electronic microscopy (HRTEM), ultraviolent-visible spectroscopy (UV-VIS) and photoluminescence (PL) spectroscopy. The sizes of QDs obtained were 4～6 nm. Under an excitation wavelength of 325 nm, peaks of ZnSe:Cu/ZnTe at 510 nm were observed. Especially, the peaks moved to 540 nm after a heat processing at 160 ℃. The facts indicate that the fluorescence emission peak’s positions of ZnSe:Cu QDs capped by ZnTe surface modification can be changed.
FU Teng-fei, LI Dong-mei, TANG Zi-long
. Synthesis of ZnTe Modified Cu Ion Doped ZnSe Quantum Dots[J]. Journal of Shanghai University, 2012
, 18(6)
: 577
-581
.
DOI: 10.3969/j.issn.1007-2861.2012.06.006
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