Simultaneous excitation at IR and UV of RE3+ triply doped SiO2-Gd2O3 materials for energy conversion purposes

Rezende, Thaís Karine de Lima; Barbosa, Helliomar P.; Lima, Karmel de Oliveira; Góes, Márcio Sousa; Lima, Ronaldo Cintra; Gonçalves, Rogéria Rocha; Ferrari, Jefferson Luis

doi:10.1016/j.ceramint.2021.09.062

Cited by 4 publications

(2 citation statements)

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“…An important step forward in sol–gel photonics was made when, pushed by the development of optical amplifiers in fibers, researchers started to investigate silica xerogels activated by rare-earth ions with the aim to obtain compact structures with the same transparency as silica glasses produced by melting but with more tailored properties and functionalities [ 18 , 23 ]. Rare-earth-doped sol–gel materials find many other applications than in the light amplification and optical communications areas, such as, for instance, lighting [ 24 ], smart windows [ 25 ], energy conversion and solar cells [ 26 , 27 , 28 ] and anti-counterfeiting [ 29 ]. Referring to the last application, luminescence tags with photonic materials have recently been worthy of great attention: the codification of the luminescence pattern and/or the encryption of a digital code based on the intensity ratios of the resulting spectra represent two ways of achieving effective anti-counterfeiting procedures.…”

Section: Sol–gel-derived Silicate Glasses For Photonicsmentioning

confidence: 99%

Sol–Gel Photonic Glasses: From Material to Application

et al. 2023

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In this review, we present a short overview of the development of sol–gel glasses for application in the field of photonics, with a focus on some of the most interesting results obtained by our group and collaborators in that area. Our main attention is devoted to silicate glasses of different compositions, which are characterized by specific optical and spectroscopic properties for various applications, ranging from luminescent systems to light-confining structures and memristors. In particular, the roles of rare-earth doping, matrix composition, the densification process and the fabrication protocol on the structural, optical and spectroscopic properties of the developed photonic systems are discussed through appropriate examples. Some achievements in the fabrication of oxide sol–gel optical waveguides and of micro- and nanostructures for the confinement of light are also briefly discussed.

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Section: Sol–gel-derived Silicate Glasses For Photonicsmentioning

confidence: 99%

Sol–Gel Photonic Glasses: From Material to Application

et al. 2023

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“…Here, we propose using the nanoparticles of a heavy-metal oxide doped with europium ions (Eu 3+ ) to accurately and precisely measure in situ temperatures with a spatial resolution toward nanometers. We used gadolinium oxide (Gd 2 O 3 ) nanoparticles that have been reported as an efficient temperature probe in photoluminescence (PL) thermometry − with a superior resistance to electron-beam-induced damage . We propose a ratiometric approach, which is based on the thermally induced changes in the intensities of different emission bands and widely used in optical thermometry. , This method exhibits potential for use in applications in multiple types of in situ TEM studies to monitor the temperature evolution or thermal properties of materials at the nano- and microscales.…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Cathodoluminescence Thermometry with a Lanthanide-Doped Heavy-Metal Oxide in Transmission Electron Microscopy

Park,

Olshin,

Kim

et al. 2024

ACS Nano

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When navigated by the available energy of a system, often provided in the form of heat, physical processes or chemical reactions fleet on a free-energy landscape, thus changing the structure. In in situ transmission electron microscopy (TEM), where material structures are measured and manipulated inside the microscope while being subjected to external stimuli such as electrical fields, laser irradiation, or mechanical stress, it is necessary to precisely determine the local temperature of the specimen to provide a comprehensive understanding of material behavior and to establish the relationship among energy, structure, and properties at the nanoscale. Here, we propose using cathodoluminescence (CL) spectroscopy in TEM for in situ measurement of the local temperature. Gadolinium oxide particles doped with emissive europium ions present an opportunity to utilize them as a temperature probe in CL measurements via a ratiometric approach. We show the thermometric performance of the probe and demonstrate a precision of ±5 K in the temperature range from 113 to 323 K with the spatial resolution limited by the size of the particles, which surpasses other methods for temperature determination. With the CL-based thermometry, we further demonstrate measuring local temperature under laser irradiation.

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