Near-infrared quantum cutting in Ho3+/Yb3+ co-doped BaZr0.8Y0.2O3-δ

Highly efficient near-infrared quantum cutting in Ce3+/Yb3+ co-doped chalcohalide glasses

Near-Infrared Quantum Cutting Long Persistent Luminescence

By combining the unique features of the quantum cutting luminescence and long persistent luminescence, we design a new concept called "near-infrared quantum cutting long persistent luminescence (NQPL)", which makes it possible for us to obtain highly efficient (>100%) near-infrared long persistent luminescence in theory. Guided by the NQPL concept, we fabricate the first NQPL phosphor Ca2Ga2GeO...

Highly efficient near-infrared quantum cutting in Ce

Near-infrared (NIR) quantum cutting involving the emission of two NIR photons for each visible photon absorbed is realized from Ce 3+ /Yb 3+ codoped chalcohalide glasses. Excitation, emission and decay spectra are measured to prove the occurrence of energy transfer (ET) from Ce 3+ to Yb 3+. The maximum ET efficiency obtained is as high as 82%, and the possible mechanism of ET is discussed. The ...

Observation of the quantum Hall effect in δ-doped SrTiO3

The quantum Hall effect is a macroscopic quantum phenomenon in a two-dimensional electron system. The two-dimensional electron system in SrTiO3 has sparked a great deal of interest, mainly because of the strong electron correlation effects expected from the 3d orbitals. Here we report the observation of the quantum Hall effect in a dilute La-doped SrTiO3-two-dimensional electron system, fabrica...

Efficient near-infrared downconversion and energy transfer mechanism in Tb-Yb co- doped NaYF4 nanoparticles

Tb-Yb co-doped NaYF4 nanoparticles (NPs) are prepared by sintering the assynthesized NaYF4:Tb, Yb NPs at 380°C under air atmosphere. The oxidization of Tb ions to Tb ions in NaYF4 NPs after sintering is demonstrated through X-ray photoelectron spectroscopy (XPS). The near-infrared (NIR) downconversion (DC) luminescence of TbYb couple is measured and investigated for the first time. The results ...