Multicolor tuning of manganese-doped ZnS colloidal nanocrystals.
In this paper, we report a facile route which is based on tuning doping concentration of Mn(2+) ions in ZnS nanocrystals, to achieve deliberate color modulation from blue to orange-yellow under single-wavelength excitation. X-ray diffraction (XRD), transmission electron microscopy (TEM), as well as photoluminescence (PL) spectra were employed to characterize the obtained samples. In this process, the relative emission intensities of both ZnS host (blue) and Mn(2+) dopant (orange-yellow) are sensitive to the Mn(2+) doping concentration, due to the energy transfer from ZnS host to Mn(2+) dopant. As a result of fine-tuning of these two emission components, white emission can be realized for Mn(2+)-doped ZnS nanocrystals. Furthermore, the as-synthesized doped nanocrystals possess extremely narrow size distribution and can be readily transferred into aqueous solution for the next potential applications.
Quan
Zewei
Z
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.
Yang
Dongmei
D
Li
Chunxia
C
Kong
Deyan
D
Yang
Piaoping
P
Cheng
Ziyong
Z
Lin
Jun
J
D002621:Chemistry / Q000379:methods; D003102:Colloids / Q000737:chemistry*; D003460:Crystallization; D008027:Light; D049449:Luminescence; D008345:Manganese / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission / Q000379:methods; D053758:Nanoparticles / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods; D010777:Photochemistry / Q000379:methods; D013440:Sulfides / Q000737:chemistry*; D013499:Surface Properties; D014961:X-Ray Diffraction; D017967:Zinc Compounds / Q000737:chemistry*
D003102:Colloids; D013440:Sulfides; D017967:Zinc Compounds; D008345:Manganese; C031238:zinc sulfide