Efficient dual mode emission in Ce3+/Yb3+/Er3+ doped yttrium aluminium gallium garnet for led device and optical thermometry

Strategy to probe multimodal light emissions from Eu3+/Yb3+activated garnet nanophosphors for LED devices and solar cell applications

“…It was proposed that the successful replacement of host lattice sites by the dopant ions is possible when the value of D r is less than 30%. 33 In this case, the ionic radii of host cations and dopants were: r h[Y 3+ ] (CN) = 0.101 nm (8), r h[Ga 3+ ] (CN) = 0.062 nm (6), and r h[Eu 3+ ] (CN) = 0.106 nm (8), r d[Yb 3+ ] (CN) = 0.098 nm (8), respectively. After calculating the value of D r using the previously mentioned details for different host-cation and dopant combinations it was found that the value of D r was less than 30% for Y 3+ , and greater than 30% for Ga 3+ .…”

Synthesis and upconversion emission studies of CaYF5:Ho3+/Yb3+ phosphor and its applications in optical thermometry, fingerprint detection, and security ink

“…For this upconversion emission spectra were recorded at various excitation powers. For upconversion emission process the emission intensity varies with pump power according to the relation I f P n , 7,8,27,28 where I is the upconversion emission intensity; P is the pump power and n is the number of photons involved in a particular emission. In Fig.…”

“…Inorganic materials doped with lanthanide ions have found tremendous applications across various elds like temperature sensing, bio-imaging, solar cells and security. [1][2][3][4][5][6][7][8][9][10] They have some unique features of converting NIR photons to intense visible or UV photons, atomic emissions like narrow line width and long lifetime. They are usually composed of a low phonon host matrix with suitable rare earth ions doped within it.…”

Comparative studies of upconversion luminescence and optical temperature sensing in Tm3+/Yb3+ codoped LaVO4 and GdVO4 phosphors

“…The energy transfer from Yb 3+ to other ions is effectively facilitated by the fact that the 2 F 7/2 → 2 F 5/2 transition of Yb 3+ is strongly resonant with the f–f transitions of common upconverting lanthanide ions including Er 3+ , Tm 3+ , and Ho 3+ . 20–24 Furthermore, the energy difference between the excited and the ground states of the Yb 3+ ion is roughly 10 000 cm −1 , which corresponds to the low-cost 980 nm laser diode excitation. To the best of our knowledge, the literature does not have any reports on the upconversion and optical thermometric characteristics of either monazite-type or zircon-type LaVO 4 codoped with Tm 3+ /Yb 3+ ions.…”