Abstract
Mixed colour emissions were observed from Bi3+ and europium (Eu3+) co-doped Y2O3 (Y2O3: Bi, Eu) nanophosphors material prepared by ethylene glycol route. The phase formation, morphological studies were confirmed by XRD, and scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Photoluminescence (PL) emission changed from yellowish-green region to approximately white on heating Y2O3:Bi3+, Eu3+ phosphor powders from 700 to 900 °C. The observed emission peaks in PL from phosphor powder materials were assigned to either the broad emission originating from the transition in Bi3+ or the visible emission peaks originating transition from the europium ion. The recorded photoluminescence emission peaks are plotted using CIE coordinates.
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