Efficient UV–visible up-conversion emission in Er3+/Yb3+ co-doped La2O3 nano-crystalline phosphor

Dual mode emission and harmonic generation in ZnO–CaO–Al2O3: Er3+ nano-composite

“…It is therefore concluded that first endothermic peak occurs due to the evaporation of water of crystallization and also may be organic compounds associated with host lattice. A similar observation has been reported in our earlier paper [22]. The second endothermic peak actually consists of two peaks which can be associated to the crystal phase formation temperature of CaO-Al 2 O 3 matrix.…”

Synthesis and up-conversion luminescence properties of Er3+/Yb3+ co-doped Sr2CeO4 phosphors

“…The values of n were measured to be 1.73, 1.90 and 2.20 for the green UC emissions for the samples with Yb 3+ concentrations of 1.5, 7.5 and 15 mol%, respectively. The variation in the slope values are due to the simultaneous involvement of the several mechanisms such as excited state absorption (ESA), energy transfer (ET), radiative and non-radiative relaxations [28]. However, the n values increased for the green UC with increasing Yb 3+ concentrations such as 1.5, 7.5 and 15 mol%, the n values for the red emission transition are decreased such as 2.03, 1.91 and 1.76.…”

Enhancement of up-conversion luminescence in Zn2SiO4:Yb3+, Er3+ by co-doping with Li+ or Bi3+

“…But oxides are much more appropriate than fluorides for practical applications due to their high mechanical and chemical stability and ease of fabrication. Up-conversion of rare-earth ions in Y 2 O 3 [14][15][16], Gd 2 O 3 [17,18] and La 2 O 3 [19] et al has been widely witnessed in recent years. Zn 2 SiO 4 is a high efficient host for green phosphor [20].…”