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By a solid-state reaction method, the blue-emitting Bi3+-doped Ca12Al14O33-CaAl2O4-MgO (Ca12Al14O33-CaAl2O4-MgO:Bi3+) phosphors were created. XRD analysis confirmed the existence of Ca12Al14O33, CaAl2O4, and MgO crystal structure. FESEM and EDS analysis confirmed the high-purity Ca12Al14O33-CaAl2O4-MgO:Bi3+ particles with a size range of about 3 μm. PLE and PL spectra showed that the Ca12Al14O33-CaAl2O4-MgO:Bi3+ phosphors well excited at 276 nm, which links to the electronic transitions of 1S0 → 3P1, and emitted blue light with peak of 474 nm, attributed to the 3P1 → 1S0 transitions of Bi3+ ions. The highest emission intensity was observed in the Ca12Al14O33-CaAl2O4-MgO:2%Bi3+ sample annealed at 1200 °C for 6 h. These results highlight the potential of the created Ca12Al14O33-CaAl2O4-MgO:Bi3+ phosphors as candidates for blue components in WLEDs.

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Blue-Emitting Bi3+-doped Ca12Al14O33-CaAl2O4-MgO Phosphors for UV-Pumped WLEDs

  • 会议论文

  • 发表日期：

    2025年

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  • Vuong Trung Doan,
  • Manh Trung Tran,
  • Nguyen Tu,
  • Do Quang Trung,
  • Nguyen Van Du,
  • Ngo Ngoc Ha,
  • Nguyen Minh Hieu,
  • Pham Thanh Huy

摘要

By a solid-state reaction method, the blue-emitting Bi3+-doped Ca12Al14O33-CaAl2O4-MgO (Ca12Al14O33-CaAl2O4-MgO:Bi3+) phosphors were created. XRD analysis confirmed the existence of Ca12Al14O33, CaAl2O4, and MgO crystal structure. FESEM and EDS analysis confirmed the high-purity Ca12Al14O33-CaAl2O4-MgO:Bi3+ particles with a size range of about 3 μm. PLE and PL spectra showed that the Ca12Al14O33-CaAl2O4-MgO:Bi3+ phosphors well excited at 276 nm, which links to the electronic transitions of 1S0 → 3P1, and emitted blue light with peak of 474 nm, attributed to the 3P1 → 1S0 transitions of Bi3+ ions. The highest emission intensity was observed in the Ca12Al14O33-CaAl2O4-MgO:2%Bi3+ sample annealed at 1200 °C for 6 h. These results highlight the potential of the created Ca12Al14O33-CaAl2O4-MgO:Bi3+ phosphors as candidates for blue components in WLEDs.