• Luminescence properties of BiPO$_4$:Ln (Ln = Dy$^{3+}$, Tb$^{3+}$ and Sm$^{3+}$) orthophosphate phosphors for near-UV-based solid-state lighting

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    • Keywords


      Photoluminescence; wet chemical synthesis; phosphor; phosphate; lanthanide doped; solid-state lighting.

    • Abstract


      The BiPO$_4$:Ln (Ln = Dy$^{3+}$, Tb$^{3+}$ and Sm$^{3+}$) phosphor were prepared using wet chemical synthesis and studied its photoluminescence properties. Under 352 nm excitation, the BiPO$_4$:Dy$^{3+}$ phosphor shows the blue (481 nm)and yellow (575 nm) emissions due to the ${}^4$F$_{9/2}$ ${\rightarrow}$ ${}^6$H$_{15/2}$ and ${}^4$F$_{9/2}$ ${\rightarrow}$ ${}^6$H$_{13/2}$ transitions of the Dy$^{3+}$ ion, respectively. When BiPO$_4$:Tb$^{3+}$ phosphor was excited at 378 nm, it emits efficient narrow green emission at 545 nm due to ${}^5$D$_4$ ${\rightarrow}$ ${}^7$F$_5$ transition. The BiPO$_4$:Sm$^{3+}$ phosphor shows yellow, orange and red emissions centred at 598 nm, which is attributed to the ${}^4$G$_{5/2}$ ${\rightarrow}$ ${}^6$H$_{7/2}$ transition of the Sm$^{3+}$ ion. The CIE coordinates indicate that the prepared phosphors have high colour purity. The photoluminescence results suggests that BiPO$_4$:Ln (Ln = Dy$^{3+}$, Tb$^{3+}$ and Sm$^{3+}$) phosphor may be used as a possible material for near-UV-based solid-state lighting.

    • Author Affiliations



      1. Department of Physics, N.H. College, Bramhapuri 441206, India
      2. N. H. College, Bramhapuri 441206, India
      3. Department of Physics, RTM Nagpur University, Nagpur 440033, India
    • Dates

  • Bulletin of Materials Science | News

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