Fig. 2: Photophysical properties of the ZnS:Cu@AlOx phosphor. | Communications Materials

Fig. 2: Photophysical properties of the ZnS:Cu@AlOx phosphor.

From: Electrically chargeable inorganic persistent luminescence in an alternating current driven electroluminescent device

Fig. 2

a XRD pattern and crystal structure of ZnS:Cu@AlOx powder (cubic phase: ICSD#77090 and hexagonal phase: ICSD#67453). b Elemental distribution mapping of ZnS:Cu@AlOx powder. c SEM image and particle size distribution of ZnS:Cu@AlOx powder. d Vertical view (i) and front view (ii) of the SEM images of the ZnS:Cu@AlOx@PDMS film (spin-coating speed = 500 rpm). e Excitation-emission wavelength 2D contour plot of the PL intensity of ZnS:Cu@AlOx powder at 10 K and 10−7 Pa (i) and corresponding excitation spectra (ii, λem = 450 and 515 nm) and emission spectra (iii, λex = 254 and 365 nm). f PL decay curves of the ZnS:Cu@AlOx powder (λex = 300 nm, λem = 450 nm, and λem = 515 nm).

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