Structural, optical and non-linear investigation of Eu3+ ions in sol–gel silicate glass

Luminescence investigation on Eu–pillar[5]arene-based diglycolamide (DGA) complexes: Nature of the complex, Judd–Ofelt calculations and effect of ligand structure

“…7 F 0 -5 L 6 transition band is the most intense among all absorption bands in the Eu-DGA complex. Similar observation was found in Al(NO 3 ) 3 -SiO 2 sol-gel glass [20]. Although forbidden by ∆S and ∆L selection rule the transition ( 7 F 0 -5 L 6 ) is allowed by ∆J rule.…”

Optical properties and up-conversion of Pr3+ doped CdS nanoparticles in sol–gel glasses

“…The method is essentially a two-step process: first Pr 3 + doped silica xerogel was prepared by the method described in our earlier paper [19]. A CdS solution was prepared according to the following method: 0.3085 gm of Cd(NO 3 ) 2 Á 4 H 2 O is dissolved in 5 ml ethyl glycol solution at room temperature (solution 1), 0.0761 gm of SC(NH 2 ) 2 is separately dissolved in another 5 ml ethyl glycol solution (solution 2).…”

Effect of CdS nanoparticles on photoluminescence spectra of Tb3 + in sol–gel-derived silica glasses

“…Silica gel containing Tb 3+ and varying concentrations of CdS were prepared by sol-gel process using tetraethylorthosilicate (TEOS) as a glass precursor in the presence of distilled water, methanol and nitric acid (Hazarika and Rai 2004;Bokatial and Rai 2010). The ratio of TEOS to other constituents used in the preparation, viz.…”