Near-infrared downshifting luminescence of CaLaTaO:Nd/Yb/K phosphors and their applications: solar cells and anti-counterfeiting.

A series of Nd/Yb co-doped CaLaTaO (CLTO) phosphors are synthesized by a high temperature solid phase method. Structural characterization confirms the successful incorporation of Nd and Yb ions into the CLTO host lattice. The photoluminescence excitation (PLE) spectra and photoluminescence (PL) spectra of CLTO:Nd and CLTO:Nd/Yb are investigated in detail.

Visible to infrared wide wavelength range luminescence of SrLaNbO: Yb/Nd/Ho phosphor under 808/980 nm excitation and temperature sensing application.

Here, the SrLaNbO: Yb/Nd/Ho phosphors are prepared through solid-state route. The upconversion (UC)/downshifting (DS) luminescence and temperature performances of all samples are investigated in detail. Under 808 nm excitation, the infrared emission band (∼2000 nm) of Ho ions is obtained.