Europium doping in KLu(WO4)2

Europium single doped potassium lutetium tungstate Eu3+:KLu(WO4)2 single crystals have been grown with an active ion doping concentration from 0.5 to 5at% using the top seeded solution growth slow cooling method. The experimental parameters for growing these single crystals have been optimized. Optical absorption and emission cross section were subjected to a detailed spectroscopic study. 58 sublevels were determined. Red visible emission was observed and attributed to the pure electronic transition under UV laser pumping. The CIE coordinates were (0.59,0.35) with 604nm as the dominant wavelength and 84% of purity. ► Successful crystal growth of new lanthanide monoclinic doped double tungstate. ► Full determination of the energy sublevels of Europium in KLu(WO4)2. ► Observation of no band transfer from the double tungstate host to Europium. ► Determination of the complete set of spectroscopic parameters of Eu3+ in KLu(WO4)2.