A novel orange-red emitting Ba2Ca(BO3)(2):Sm3(+) phosphor to fill the amber gap in LEDs: Synthesis, structural and luminescence characterizations

作者：Manhas M; Kumar Vinay; Singh Vivek K; Sharma J; Prakash Ram; Sharma Vishal; Bedyal A K; Swart H C

来源：Current Applied Physics, 2017, 17(11): 1369-1375.

DOI：10.1016/j.cap.2017.07.015

• Optical materials
• Solid state synthesis
• Luminescence
• X-ray diffraction (XRD)
• Phosphors

The present paper reports on the structural and luminescent properties of un-doped and Sm3+ doped Ba2Ca(BO3)(2) phosphors synthesized by the conventional solid state method. For structural characterizations, the X-ray diffraction, FTIR spectroscopy and Rietveld refinement method were used. The FTIR spectrum was composed of basic BO3 and BO4 structural units of borates. The Sm3+ doped phosphors under 402 nm (H-6(5/2)-> L-4(13/2)) excitation, showed an orange red emission corresponding to the 601 nm ((4)G(5/2)-> H-6(7/2)) transition of the Sm3+ ion. An increase in the PL emission intensity was observed up to 2 mol % with the increase in Sm3+ ions concentration. The critical distance between the Sm3+ - Sm3+ ions were found to be 24.36 angstrom. Moreover, the phosphors decaytime and optical bandgap at different concentration of Sm3+ ion also have been discussed in details. All the results show that Ba2Ca(BO3)(2):Sm3+ phosphor may be used with a near ultraviolet (n-UV) chip to fill the amber gap in light emitting diodes (LEDs).

• 出版日期2017-11
• 单位司法部司法鉴定科学技术研究所