A Comparative Study on Luminescence Properties of Y2O3: Pr3+ Nanocrystals Prepared by Different Synthesis Methods

Abstract

Pr3+-doped Y2O3 nanocrystals (NCs) have been obtained via five wet-chemistry synthesis methods which were optimized in order to achieve superior optical properties. To this end, a systematic study on the influence of different reaction parameters was performed for each procedure. Specifically, precursor concentration, reaction temperature, calcination temperature, and time, among others, were analyzed. The synthesized Y2O3: Pr3+ NCs were characterized by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), powder X-ray diffraction (PXRD), transmission electron microscopy (TEM), and reflectance and Raman spectroscopy. In addition, the optical properties of such NCs were investigated by excitation, emission, and luminescence decay measurements. Concretely, emission from the 1D2 level was detected in all samples, while emission from 3PJ was absent. Finally, the effect of the synthesis methods and the reaction conditions on the luminescence decay has been discussed, and a comparative study of the different methods using the fluorescence lifetime of so-obtained Y2O3: Pr3+ NCs as a figure of merit has been carried out.

Enhancing the Photoluminescence Property of Pr3+ Ions by Understanding the Polymorphous Influence of the K3Lu(PO4)2 Host

“…Such a broadband emission is located in the 1 D 2 → 3 H 4 and 3 P 0 → 3 H 6 transition regions, and considering the weak energy transitions from the 3 P 0 excited state ( 3 P 0 → 3 H 4,5 and 3 F 2 ), the dominant visible emission of Pr 3+ ions in phase III originates from the 1 D 2 → 3 H 4 transition. The phenomenon is similar to Pr 3+ -doped sesquioxides (Lu 2 O 3 , Y 2 O 3 , and Gd 2 O 3 ), whose visible emissions are derived from the 1 D 2 excited state. − Then, the RT concentration-dependent fluorescence spectra of K 3 Lu­(PO 4 ) 2 :Pr 3+ were characterized (Figure c). Upon 444 nm excitation, the optimum Pr 3+ -doped concentration is 0.6 at.…”

Yttrium Oxide-Catalyzed Formation of Electrically Conductive Carbon for Supercapacitors

“…Figure shows the Raman spectra for Y 2 O 3 , TC deposited on Y 2 O 3 , and the physical mixture of TC and Y 2 O 3 . The peak at 376 cm –1 is assigned to the A g + F g modes. − The TC deposited on Y 2 O 3 shows a 10 cm –1 shift from the Y 2 O 3 band, whereas the physical mixture does not show a shift outside the resolution of the instrument. This demonstrates a close charge transfer interaction when the carbon is directly grown on the yttrium oxide surface.…”

Development of Er3+, Yb3+ Co-Doped Y2O3 NPs According to Yb3+ Concentration by LP–PLA Method: Potential Further Biosensor

“…It is widely introduced as a potential material that can be applied to cancer treatment and biosensors using various biological imaging, photodynamic therapy, and phosphors [ 5 ]. The Y 2 O 3 NPs produced by us generate fluorescence according to the Yb 3+ concentration [ 40 ], and when a solvent is placed in body fluid or urine and a laser is generated, the positively charged particles of the solvent bind to the NPs [ 41 ] ( Figure 6 a). We propose that through purification of NPs, trace amounts of harmful substances can be measured by absorbance values ( Figure 6 a(i)).…”