Efficient resonance energy transfer study from Ce 3+ to Tb 3+ in BaMgF 4

Highly efficient and stable red perovskite quantum dots through encapsulation and sensitization of porous CaF2:Ce,Tb nanoarchitectures

“…According to the excitation spectrum of CaF 2 :Ce,Tb nanospheres, the emission of Tb 3+ ions comes from the sensitization of Ce 3+ ions. 28 Moreover, the comparative excitation spectra of the pristine CsPbI 3 PQDs and CaF 2 :7%Ce,7% Tb&CsPbI 3 composites clearly show that the excitation spectrum of the composite has one more shoulder peak compared to that of the pristine CsPbI 3 PQDs, and this part is consistent with the excitation spectrum of Ce 3+ ions. This indicates that the red emission of the composite comes from both excitations of Ce 3+ ions and the pristine PQDs itself, which also explains the stronger luminescence intensity of the composite.…”

“…Under the excitation of a 300 nm light, the electrons are excited to the excited state (5D) of Ce 3+ ions, and a part of the energy is used for the radiation transition of Ce 3+ ions. 30 More importantly, most of the energy is used to sensitize the emission of Tb 3+ ions (the emission peaks are 491 541 582 and 622 nm) 28 and then the emission light of Tb 3+ ions is used to excite PQDs, resulting in the light emission of exciton recombination for PQDs. Notably, the radiative energy transfer from Tb 3+ ions to PQDs is dominant, while the non-radiative energy transfer from Tb 3+ ions to PQDs also exists.…”

Synthesis and characterization of Ca3Lu(GaO)3(BO3)4:Ce3+,Tb3+ phosphors: tunable-color emissions, energy transfer, and thermal stability

“…This phenomenon illustrated that there existed effective ET from Ce 3+ to Tb 3+ ions in CLGB:0.04Ce 3+ , y Tb 3+ phosphors and the emission intensity of blue light (355–475 nm) and the green light (475–700 nm) could be tuned by doping different concentration of Tb 3+ ions. The ET efficiency ( η ET ) from Ce 3+ sensitizers to Tb 3+ activators in CLGB:0.04Ce 3+ , y Tb 3+ phosphors can be calculated by: 53,54 where I s0 and I s are the PL intensity of the Ce 3+ sensitizers without and with the presence of Tb 3+ ions, respectively. Based on the eqn (1) , the results were measured and listed in Fig.…”

Energy Transfer Mechanisms and Optical Thermometry of BaMgF4:Yb3+,Er3+ Phosphor

“…The experimental procedure used in the preparation of BaMgF 4 :Yb 3+ ,Er 3+ is the same as reported in our previous work. , A similar procedure was adopted for the synthesis of BaMgF 4 :Yb 3+ ,Er 3+ phosphors. All the reagents used were of high purity procured from Sigma-Aldrich (99.99%).…”