| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1578034 | Materials Science and Engineering: A | 2011 | 4 Pages |
By controlling the concentration of defects and their type in strontium sulphide phosphor, a broad range of colours in the visible spectrum can be achieved. Photoluminescence (PL) spectrum in the blue to green range of SrS:Cu,Cl is presented and explained on the basis of charge compensation process and coordination about the Cu+ ion. Analysis of lattice parameter, strain and grain size were carried out on the basis of X-ray diffraction (XRD) data. From the study of diffuse reflectance spectra (DRS), red-shift in band-gap was observed with increasing doping concentration, which is due to the presence of doping induced tail states.
Graphical abstractPhotoluminescence spectrum of SrS:Cu,Cl phosphor for different Cu concentrations at 300 K, λex = 310 nm. Emission colour varies from blue to red as the doping concentration is increased.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► We report the study of the effect of doping concentration on the lattice parameter, band gap and photoluminescence in SrS:Cu,Cl phosphor. ► Analysis of the observations were made by comparison with previous reported results. ► Emission colour in SrS:Cu,Cl phosphor can be tailored from blue to green on increasing the doping concentration. ► Band gap is red shifted with doping concentration due to band tailing effects. ► Analysis of lattice parameter, strain and grain size are carried out on the basis of X-ray diffraction (XRD) data.
