Lanthanide-based luminescent thermosensors: From bulk to nanoscale

Critical Power Density: A Metric To Compare the Excitation Power Density Dependence of Photon Upconversion in Different Inorganic Host Materials

“…Via the UC process, two (or more) photons of longer wavelength absorbed in a material lead to the emission of a shorter-wavelength photon. Research in this field accelerated when it was demonstrated that the efficiency of UC could be increased multiple times by co-doping with another material with a larger absorption cross section. − Common applications of UC materials include luminescence thermometry , and photonic marking used, for example, in bioimaging . Ultimately, applications that require efficient performance at much lower power densities of excitation photons, such as photovoltaics or photocatalysis, could also be realized.…”

Y2(Ge,Si)O5:Pr phosphors: multimodal temperature and pressure sensors shaped by bandgap management

“…Luminescence thermometry presents great potential in in vitro and in vivo bio-and medical imaging and treatment but also appears attractive in such fields as micro-and nanoelectronics, aviation industry, space research, measurements of temperature distribution over (large) surfaces. [12][13][14][15] Emerging applications involve e.g. catalysis or the protection of structural materials.…”

“…16,17 The reader may find more comprehensive information on these topics in numerous reviews or books published in recent years. 10,14,[18][19][20][21][22][23] Measuring very high pressure is necessary for many technological and scientific processes, among them in such sophisticated circumstances as simulating the conditions of stars and planet formation or geological processes. 24 The common requirement of all considered applications of luminescent thermometers and manometers is their high thermal sensitivity, low inaccuracy of temperature/pressure readouts, good repeatability, as well as chemical and physical stability when used.…”

Multifunctional materials for catalyst-specific heating and thermometry in tandem catalysis

“…Alternatively, luminescence spectroscopy provides a contactless thermometry technique based on the temperature-sensitive quenching of luminescence in so-called thermophosphor materials. 11,12 Farpón et al 13 and Geitenbeek et al 14 independently introduced this method for operando thermometry in packed-bed catalytic reactors, and the concept was later extended to slurry-phase catalysis. 15 We herein prove this method to be an effective approach to independently probe the operation temperature of two catalyst materials in a tandem conversion process subjected to differential heating.…”