SrMoO4:Er3+-Yb3+ upconverting phosphor for photonic and forensic applications

Thermal and pump power effect in SrMoO4:Er3+-Yb3+ phosphor for thermometry and optical heating

“…UC emission spectra of the codoped phosphors (keeping erbium ions concentration fixed at 0.3 mol% and varying the ytterbium ions concentration up to 5.0 mol%) prepared by co-precipitation method upon excitation at 980 nm have been recorded and 0.3 mol% Er 3+ -2.0 mol%Yb 3+ combination was found to be optimum [24]. Fig.…”

“…strontium carbonate (SrCO 3 ), ammonium hepta-molybdate tetra hydrate (NH 4 ) 6 Mo 7 -O 24 Á4H 2 O, erbium oxide (Er 2 O 3 ), ytterbium oxide (Yb 2 O 3 ) have been taken to synthesize the Er 3+ /Er 3+ -Yb 3+ doped/codoped SrMoO 4 phosphors by using chemical co-precipitation method [24]. A series of phosphors were prepared by keeping erbium ions concentration fixed at 0.3 mol% and ytterbium ions concentration was varied from 1.…”

“…The XRD patterns of all the developed phosphors have been recorded by using Cu Ka radiation source (k = 0.154 nm) [24]. The upconversion (UC) emission spectral performance at different pump power densities has been performed by using continuous wave (CW) 980 nm and 808 nm NIR laser diode sources by using a monochromator (Princeton: Acton SP-2300) attached with the photomultiplier tube (PMT) operated through a personal computer.…”

“…4 I 15/2 transitions. The two-photon absorption process is found to be responsible for the generation of the upconversion emission bands lying in the green region under NIR diode laser excitation [24,[25][26][27]. The origination of the UC emission bands and their dynamic energy migration mechanisms have been explained elsewhere [24].…”

Frequency upconversion in catechin assisted $$\hbox {LaF}_{3}$$ LaF 3 : $$\hbox {Yb}^{3+}$$ Yb

“…Optical properties of the luminescent materials can be altered either by modifying the environment around rare earth ions or by incorporating the nanoparticles and/or by reducing the particle size. [1][2][3][4][5][6] The uniqueness of the work stems from the fact that upconversion nanostructures (UCNs) have gained prominence due to their ability to overcome the known drawbacks such as auto-fluorescence from biological samples, high signal-to-background ratio, short penetration depth, etc., of down-conversion nanostructures (DCNs). In UCNs, the lanthanides have a special place because they can be easily excited under visible or near infrared (NIR) light due to their ladder like energy levels.…”