NIR emitting phosphors based on sensitization by molybdate anion

作者：Vyas Arpita^*; Talewar R A; Muley Aarti; Joshi C P; Moharil S V

来源：Journal of Luminescence, 2018, 194: 656-660.

DOI：10.1016/j.jlumin.2017.09.032

• Photoluminescence
• NIR emission
• Molybdate
• Quantum cutting
• Yb3+
• Nd3+

In this work, NIR emission is reported in Y2MoO6 doped with Nd3+ or Yb3+. The emission follows excitation by near ultraviolet (nUV) light that can be absorbed by MoO4-2 anion with subsequent energy transfer to Nd3+ or Yb3+. Moreover, efficient energy transfer from Nd3+ to Yb3+ was also observed. By virtue of this transfer, higher NIR emission intensities were observed for Nd3+, Yb3+ double doped phosphors. The energy transfer mechanisms based on cooperative energy transfer (CET) and cross relaxation followed by NIR emission are suggested. It is also suggested that Y2MoO6: Yb3+, Nd3+ phosphors hold a potential for applications requiring NIR emission that can be excited by nUV light; e.g. in photovoltaics based on c-Si.

• 出版日期2018-2