Abstract
Abstract Mn doped ZnS is considered as one of the most important group II–VI semiconductors in the last two decades since its good character of stable emission, heavy metal free and environmental friendly. A facile, effective and green hydrothermal protocol was reported to synthesize Mn doped ZnS nanocrystals. The obtained nanocrystals are pure β-phase, spherical, mono-dispersed and narrow in size distribution. Besides the well-known Mn: 4T1–6A1 energy transition, photoluminescence (PL) spectra indicated that the transition also occurred between the surface-defect state to the Mn 4T1 state, leading to the emission changing from green to orange. By investigating the steady state and time-resolved PL spectra, a novel energy transition and transfer mechanism is established.
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