The energy transfer mechanism in Ce,Tb co-doped LaF3 nanoparticles

Surface Characterization and Photoluminescence Properties of Ce3+,Eu Co-Doped SrF2 Nanophosphor

“…The XRD peaks broaden with increasing the dopants ions (see Figure 1). The broadening of the XRD peaks were also observed by other groups [16,17]. H.A.A.…”

“…H.A.A. Seed Ahmed et al [ 16 ] attributed the XRD peak broadening to impurity broadening. Whereas, F. Wang et al [ 17 ] assigned the XRD peak broadening to reduction in the nanoparticle size of the matrix.…”

Effect of Tb3+ concentration on the structure and optical properties of triply doped ZnAl2O4:1% Ce3+,1% Eu3+,x% Tb3+ nano-phosphors synthesized via citrate sol-gel method

“…The excitation at 283 nm produces, in addition to the characteristic Tb 3+ emission peaks, the defect emission band near 395 nm. Often clear f-f excitation bands of Tb 3+ ions have been reported in excitation spectra in the range 280-380 nm [42], although these are not observed in the present case and the emission spectrum excited at 377 nm shows a strong background of host defect emission, indicating that the host defects are masking this effect. The short wavelength excitation at 230 nm, ascribed to the strong (allowed) f-d excitation transition of Tb 3+ ions, did not excite the host defect emissions but excited the Tb 3+ ions to produce an emission spectrum with no background, characteristic of these ions alone.…”

Non-invasive Photodynamic Therapy in Brain Cancer by Use of Tb3+-Doped LaF3 Nanoparticles in Combination with Photosensitizer Through X-ray Irradiation: A Proof-of-Concept Study

“…1f). The dominant green band around 540 nm can be caused by the 5 D 4 to 7 F j ( j  = 6–3) transitions of Tb 3+ [21]. Overall, the results demonstrate that the LaF 3 :Tb nanoparticle could be used in biological applications and regulate photosensitizer activation by X-ray.…”