(Y0.968Er0.002Yb0.030) 2 O3 Upconverting Particles as Optical Heater

Mahata, Manoj Kumar

doi:10.24218/jatpr.2016.04

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Fir Based Optical Thermometry and Its Reliability1

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2022

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“…Now, the FIR has been calculated from the pump power dependent UC spectrum and corresponding temperatures has been calculated and linearly plotted according to the equation [58,59] 24 Temperature s Pump power density constant = ´+ ( ) where, 's' represents the slope value. From equation (24), it is clear that at zero pump power density, the constant is equal to the ambient temperature of the codoped glass.…”

Section: Fir Based Optical Thermometry and Its Reliabilitymentioning

confidence: 99%

Fluorescence intensity ratio technique and its reliability

Kesarwani

Kumar

2022

Methods Appl. Fluoresc.

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The present article reports the optical absorption and upconversion (UC) studies of 1.0 mol% Er3+/2.0 mol% Yb3+ doped/codoped glasses prepared by melt-quenching technique. The elements present and the composition of the prepared glass have been confirmed from XPS and XRF analysis respectively. Judd-Ofelt intensity parameters have been calculated using the absorption spectrum which is further utilized to predict the nature of Er_O bond, the transition probabilities, branching ratios and radiative lifetimes. The CIE study shows non-colour tunable and highly pure green emission (94.2%). The temperature-dependent UC emission spectra of the 2.0 mol% Yb3+ sensitized glass have been recorded at three different pump power densities to establish a reliable FIR based temperature scale. Furthermore, the Arrhenius fitting of the temperature-dependent spectra reveals low thermal quenching of green luminescence in the codoped glass.

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Section: Fir Based Optical Thermometry and Its Reliabilitymentioning

confidence: 99%