Crystal structure and luminescence property of a single-phase white light emission phosphor Sr3YNa(PO4)3F:Dy3+

White light emission from single-phase Y2MoO6: xPr3+ (x = 1, 2, 3 and 4 mol%) phosphor

“…Based on the results obtained by single-phase phosphors [16,17], researchers developed numerous surveys about the production of white emitters using single host matrix. Shang et al [18] mentioned four possible methods to obtain white light in single-phase dies: (i) emission in white can be generated from the doping of only one type of rare earth in the matrix [14]; (ii) white light can be generated by combining multiple rare earth ions with simultaneous different emissions: red, green and blue; yellow and blue (such as Ho 3+ / Yb 3+ / Tm 3+ , Tm 3+ / Tb 3+ / Eu 3+ [19,20]; (iii) the emission of white light can be generated by the association of ions in pairs based on the energy transfer mechanism (Eu 3+ / Tb 3+ , Tm 3+ / Er 3+ , Tm 3+ / Ho 3+ , Dy 3+ /Eu 3+ , Dy 3+ /Sm 3+ ) [21][22][23][24][25][26][27] and (iv) luminescent materials related to electronic defects may also emit white light [28].…”

“…Their study was based on the evaluation of energy transfers among doping elements. Yang et al [14] produced Sr 3 YNa(PO 4 ) 3 F: Dy 3+ from solid state reaction and studied the thermal and chemical stability of the compound for photoluminescent use. It was verified that the high activation energy results in good thermal stability and that doping with the Dy 3+ promoted simultaneous emitters in the violet (326-390 nm), blue (483 nm) and yellow regions (580 nm), allowing emitting white phosphor for white LEDs.…”

Single-Phase Organic–Inorganic Hybrid Nanoparticles for Warm-White Lighting

“…First of all, strong blue light with the color-temperature CCT greater than 7000 K is harmful to the retina of the human eye, especially in adolescents. Second, the light re-absorption by each phosphor and sedimentation in silicone resin may reduce the W-LED efficiency. ,, Third, the production cost increases, and the color reproducibility reduces because the thermal stability and attenuation of each phosphor are different. , …”

“…2,5,6 Third, the production cost increases, and the color reproducibility reduces because the thermal stability and attenuation of each phosphor are different. 7,8 Researchers expect to develop a panchromatic single-phase phosphor excited by UV-LED chips with a short wavelength and high energy in order to address the issues mentioned above. This sort of phosphor materials can enhance the colorrendering index and decrease the re-absorption of multiphased phosphors.…”