Optical and Magnetic Properties of Mn-Doped ZnS Nanoparticles Synthesized by a Hydrothermal Method

The Mn-doped ZnS nanoparticles with T
²
_d
- F4̅3m cubic structure and an average crystalline size of about 16 nm were synthesized using the hydrothermal method at 220 °C for 15 h from Zn(CH
₃
COO)
₂
(0.1M), Mn(CH
₃
COO)
₂
(0.01M), and Na
₂
S
₂
O
₃
(0.1 M) as the precursors. The appearance of characteristic photoemission bands of Mn
²⁺
(3d
⁵
) ions at 390, 430, 467, and 493 nm in the photoluminescence excitation spectra while monitoring the yellow-orange band at 585 nm showed that the Mn
²⁺
(3d
¹⁰
) ions substituted for Zn
²⁺
(3d
¹⁰
) ions in ZnS matrix and caused the ferromagnetism of Mn-doped ZnS nanoparticles. The dependence of photoluminescence, photoluminescence excitation spectra, and magnetization curves on Mn content and the wavelength of excitation radiation were reported.