Comment on “Room-Temperature and Ultrafast Synthesis of Highly Luminescent and Extremely Small Eu³⁺-Doped YVO₄ Nanocrystals”

Reply to “Comment on ‘Room-Temperature and Ultrafast Synthesis of Highly Luminescent and Extremely Small Eu3+-Doped YVO4 Nanocrystals’”

“…Therefore, the effect of the aging time on the PLQY of Y 0.6 VO 4 :Eu 0.4 nanoparticles was investigated and the result was shown in Figure . As expected, the PLQY of only 22.8% was obtained for Y 0.6 VO 4 :Eu 0.4 nanoparticles without aging, which is very close to that of 21% measured by Perrella et al It was found that the PLQY gradually increases with prolonging aging time and reaches a maximum value of 60.7% at 24 h. The improvement in PLQY may be due to the optimization of the crystallinity or the surface defect passivation of the aged Y 0.6 VO 4 :Eu 0.4 nanoparticles. Furthermore, we found that the PLQYs of Y 0.6 VO 4 :Eu 0.4 nanoparticles are also influenced by the drying temperature for aged and unaged samples.…”

“…We thank Perrella et al for raising some important points on the Eu-doped YVO 4 nanocystals . We completely agree with their viewpoints.…”

“…We are very grateful to Perrella et al for their valuable comments on our recently published paper, which offers us a good opportunity to clarify some issues. Perrella et al utilized our room-temperature method to synthesize Y 0.6 VO 4 :Eu 0.4 nanoparticles, and a photoluminescence quantum yield (PLQY) of 21% was achieved, which is much lower than that of 62% reported in our paper.…”