Multiphoton near-infrared quantum cutting luminescence phenomena of Tm^3+ ion in (Y_1-xTm_x)_3Al_5O_12 powder phosphor

Abstract

In the present study, the multiphoton near-infrared downconversion quantum cutting luminescence phenomena of Tm3+ ion in (Y(1-x)Tm(x))(3)Al(5)O(12) powder phosphor, which is currently a hot research topic throughout the world, is reported. The x-ray diffraction spectra, the visible to near-infrared excitation and emission spectra, and fluorescence lifetimes are measured. It is found that Tm:YAG powder phosphor has intense two-photon quantum cutting luminescence, and, for the first time, it is found that Tm:YAG powder phosphor has strong four-photon near-infrared quantum cutting luminescence of 1788 nm (3)F4 → (3)H6 fluorescence of Tm(3+) ion. It is also found that the theoretical up-limit of four-photon near-infrared quantum cutting efficiency is about 282.12%, which results from both the {(1)D2 → (3)F2, (3)H6 → (3)H4} and {(3)H4 → (3)F4, (3)H6 → (3)F4} cross-energy transfers.

Multi-photon quantum cutting in Gd2O2S:Tm3+ to enhance the photo-response of solar cells

“…Consequently, the relative intensities of emission lines can be compared between different Tm 31 concentrations but not between different detectors. The emission lines are ascribed to the 3 H 4 R 3 H 6 transition at 800 nm, the 3 H 5 R 3 H 6 transition at 1215 nm, the 3 H 4 R 3 F 4 transition at 1450 nm, and the 3 F 4 R 3 H 6 transition at 1800 nm 21,29,41 . At low Tm 31 concentrations (0.1%, 1%), the emission is mainly from the 3 H 4 level (lines indicated with a green triangle), whereas at higher concentrations (5%, 10%), emissions from 3 H 5 (yellow square) and 3 F 4 (red circle) dominate.…”

“…At low Tm 31 29,44 , which would lead to similar downconversion schemes, except that the 3 H 5 level is directly populated in the first step of the sequence of cross-relaxation steps. Because we experimentally observe 3 H 5 emission only at the highest concentrations, the dominant first cross-relaxation process is probably ( 1 G 4 , 3 H 6 ) R ( 3 F 2,3 , 3 F 4 ).…”

“…A large number of downconversion materials able to convert high-energy photons into multiple lower-energy photons have recently been developed [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] . The downconversion process occurs by energy transfer between luminescent centers, either lanthanide ions with a wide range of energy levels or organic molecules with low-energy triplet states 31,32 .…”

Optical analysis of samarium doped sodium bismuth silicate glass

“…Rare earth (RE) ion activated materials find wide applications in display devices, lighting technology, solar cell energy conversion, telecommunications, remote sensing etc [1]. Recent years have witnessed a tremendous increase in research activities related to glasses doped with rare earth ions in various forms such as network formers, modifiers or luminescent ions [2,3].…”

Near Infrared Quantum Cutting Luminescence of Er3+/Tm3+ Ion Pairs in a Telluride Glass

“…that the actual photoelectric conversion efficiency of silicon based solar cells can be enhanced by the quantum cutting effect. Meijerink 19, 27 , Qiu and Zhou 12, 15 , Zhang 7, 27 , Huang 24 , and our group 8, 28 have reported experimental research on first-order, multiphoton, near-infrared quantum cutting in Er 3+ or Tm 3+ activator-ion doped materials. This improvement has led to the development of first-order, multiphoton quantum cutting germanium (Ge) and silicon–germanium (Si–Ge) solar cells 1, 7, 8, 12, 15, 27, 28 , which are sensitive to wavelengths of 280–1850 nm and are environmentally friendly.…”