Effect of Yb^3+ on the upconversion luminescence of Tm^3+/Yb^3+ co-doped La_2O_3-TiO_2-ZrO_2 glasses

Down and up conversion luminescence of the lead-free organic metal halide material: (C9H8NO)2SnCl6·2H2O

“…27,28 This property makes this material a promising candidate for the improvement of solar cells' efficiency as it extends the operating spectral range to the infrared (IR) and near infrared (NIR) range. [29][30][31][32][33][34] So far, the most interesting results were obtained for lead halide based compounds. Taking into account the toxicity of lead (Pb), many researchers have oriented their interest towards the use of other metals such as Cu, Sn and Bi.…”

Applications of Rare‐Earth‐Based Up‐Conversion and Down‐Conversion in Perovskite Solar Cells: A Review

“…[ 49 ] Although TiO 2 can be used as the host for the UC process of RE ions, it should be noted that the UC efficiency of RE‐doped TiO 2 is very low due to the relatively high phonon energy of 600–700 nm −1 of TiO 2 host. [ 50 ]…”

“…[49] Although TiO 2 can be used as the host for the UC process of RE ions, it should be noted that the UC efficiency of RE-doped TiO 2 is very low due to the relatively high phonon energy of 600-700 nm À1 of TiO 2 host. [50] Instead of directly doping TiO 2 with RE ion, it is more preferred to presynthesize UCNPs in which RE ions are dispersed in a judicious host (such as NaYF 4 , etc.) and then introduce the UCNPs phosphors into the functional layer of PSCs.…”

Physicochemical Properties of High‐Entropy Oxides

“…Up-conversion is a multiphoton process and strongly dependent on the matrix and activator utilized for doping. [123] Some HEOs are known as suitable matrix materials, and the matrix doped with RE activators, such as Yb, Er and Tm, can exhibit excellent upconversion performance. Moreover, co-doped HEO with RE activators has the prospect of bidirectional wavelength conversion.…”

“…RE‐doped HEOs can exhibit nonlinear optical properties similar to low‐entropy RE‐containing oxides, such as anti‐Stokes shift, which is also called up‐conversion. Up‐conversion is a multiphoton process and strongly dependent on the matrix and activator utilized for doping [123] . Some HEOs are known as suitable matrix materials, and the matrix doped with RE activators, such as Yb, Er and Tm, can exhibit excellent up‐conversion performance.…”