Sm(3+)-doped Ba3Bi(PO4)3 orange reddish emitting phosphor

Area of Science:

• Materials Science
• Solid-State Chemistry
• Luminescence

Background:

• Barium bismuth phosphate (Ba(3)Bi(PO(4))(3)) is a host material with potential for luminescence applications.
• Doping with rare-earth ions like samarium (Sm(3+)) can induce desirable photoluminescent properties.

Purpose of the Study:

• To synthesize and characterize Ba(3)Bi(PO(4))(3):Sm(3+) phosphors.
• To investigate the photoluminescence (PL) properties and energy transfer mechanisms.
• To evaluate their potential for red light emission applications.

Main Methods:

• Solid-state reaction process for phosphor synthesis.
• X-ray diffraction (XRD) for crystal structure analysis.
• Photoluminescence spectroscopy to study excitation and emission spectra.

Main Results:

• Optimized composition Ba(3)Bi(PO(4))(3):0.06Sm(3+) shows strong luminescence.
• Broad excitation bands observed between 300-500 nm.
• Red emission peaks at 563, 599, 646, and 709 nm under UV/blue light excitation, corresponding to Sm(3+) 4G(5/2)→6H(J) transitions.
• Calculated critical distance of 21.0 Å and confirmed d-d interaction for energy transfer.

Conclusions:

• Ba(3)Bi(PO(4))(3):Sm(3+) phosphors are efficient red-emitting materials.
• The d-d interaction facilitates energy transfer between Sm(3+) ions.
• The synthesized phosphors demonstrate suitable chromatic properties for potential applications.