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

Change in structural morphology on addition of ZnO and its effect on fluorescence of Yb3+/Er3+ doped Y2O3

“…Here again green emission is not recorded since the pump laser line match to the transition of the Er 3+ ions. The emission intensity increases on heat treatment due to decrease in unwanted impurity as reported earlier (see Fig 8) [16]. The slope of ln I-ln P plots for the blue emission shows a clear quadratic dependence with value to be 1.75 (not shown here).…”

“…We found that the composite material is comparatively better host not only for the luminescence point of view but from stability point of view also. Verma et al [16] in a recent work have reported that stability of composite ZnO:Ca 12 Al 33-O 15 is larger than the Ca 12 Al 33 O 15 phosphor. As discussed earlier, on mixing of ZnO with Y 2 O 3 the structure changes and a dumble shape morphology is obtained.…”

“…The large band gap also supports the feature of strong radiative transitions because of reduced loses and weak scattering. It has been observed that addition of another organic/inorganic host improves the optical property of the material [16,17]. Moreover, the so called composite material further has wide applications.…”

Luminescence properties of ZnO/TiO 2 nanocomposite activated by Eu 3 + and their spectroscopic analysis

“…In the last few decades, such enhancement has achieved almost near to the theoretical limit and have very little room to work on that. Hence, a new type of host materials is required for the improvement of luminescence properties for opto-electronic applications [7]. In recent years, many efforts have been made for the enhancement of the luminescence intensity by using conventional route, but no significant outcome has been reported and therefore, to overcome this problem, researchers have to think about a new kind of material such as multifunctional hybrid material, composite material, etc.…”

Enhanced temperature sensing response of upconversion luminescence in ZnO–CaTiO3: Er3+/Yb3+ nano-composite phosphor

“…The potential of ZnO is well known as light emitting material, laser diodes, etc. [25][26][27] and so addition of ZnO in CaTiO 3 could make it multifunctional. In addition, authors have recently seen many publications quoting the enhanced temperature sensitivity of Er 3+ doped phosphors despite the change in emission wavelengths of Er 3+ bands.…”