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A novel tunable-light-emitting single-host Ca12Al14O32Cl2:0.5%Ce3+ phosphor has been prepared in H2 atmosphere by a solid-state reaction method. Upon 340nm excitation, the phosphor shows an asymmetric broadband emission centered at 503nm, assigned to the 5d-4f transitions of Ce3+. For Ce3+ doped Ca12Al14O32Cl2, a large red-shift (~69nm) and an increased full width at half maximum from 66 to 115nm...
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