Upconverting tri-doped calcium fluoride-based thin films: a comparison of the MOCVD and sol–gel preparation methods

Abstract

Chemical approaches, either through vapor or solution routes, are applied to the preparation of tri-doped CaF2-based films for upconversion applications.

Journey of a molecule from the solid to the gas phase and vice versa: direct estimation of vapor pressure of alkaline-earth metalorganic precursors for atmospheric pressure vapor phase deposition of fluoride films

“…Interestingly, the morphology presently observed is quite similar to the one recently found for lanthanide doped CaF 2 thin films obtained at 450 °C on silicon using a reduced pressure MOCVD approach. 45 This finding points to a direct correlation of the CaF 2 film morphology with the kinetic growth process on silicon substrate for a given temperature range.…”

“…In literature there are few reports on the synthesis of MgF 2 and CaF 2 thin films through reduced pressure chemical vapor deposition from the "second-generation" [M(hfa) 2 •polyether] adducts. 9,10,19,24,42,[44][45][46] Recently, a solution process through sol-gel/spin coating approach has been tested as well for the deposition of CaF 2 . 9,45 To the best of our knowledge, the present study represents the first report on the synthesis of MgF 2 and CaF 2 thin film through atmospheric pressure process starting from the [Mg(hfa…”

“…9,10,19,24,42,[44][45][46] Recently, a solution process through sol-gel/spin coating approach has been tested as well for the deposition of CaF 2 . 9,45 To the best of our knowledge, the present study represents the first report on the synthesis of MgF 2 and CaF 2 thin film through atmospheric pressure process starting from the [Mg(hfa…”

Multifunctional CaF2: Yb3+, Ho3+, Gd3+ Nanocrystals: Insight into Crystal Growth and Properties of Upconversion Luminescence, Magnetic, and Temperature Sensing Properties

“…Generally speaking, the chemical composition, phase, size, and morphology of inorganic nano-and microphosphors influence their physicochemical properties. 21 At present, CaF 2 phosphors have been prepared through many synthesis methods, such as co-precipitation, 22 thermal decomposition method, 16 metal−organic chemical vapor deposition, as well as sol−gel associated with spin-coating procedure 23 These explorations have made great contributions to future research in this field. As for the synthesis of CaF 2 , most of them are synthesized by thermal decomposition and hydrothermal synthesis.…”

White light tuning and temperature sensing of NaLu(WO4)2:Ln3+ up-converting phosphor

“…21 Based on the principle of the three primary colors, white light can be produced by mixing red, green and blue in a suitable ratio. [21][22][23][24] Among the RE elements, Tm 3+ is the most popular because of its blue and red emission bands. 25,26 In the same material, UC white light is frequently obtained via tripledoping Yb 3+ , Ho 3+ (Er 3+ ), and Tm 3+ in an appropriate mixing ratio.…”