Lanthanide Emission for Solar Spectral Converters: An Energy Transfer Viewpoint

Insights into NdIII to YbIII Energy Transfer and Its Implications in Luminescence Thermometry

“…A general differential rate equation has the general form: ,− d d t P k false( t false) = ∑ j ≠ k W j → k P j false( t false) − ∑ j ≠ k W k → j P k false( t false) where the summations run the levels of the system. P k and P j are the populations of the levels | k ⟩ and | j ⟩ , W j → k and W k → j are rates between these states (Nd III –Yb III energy transfer or decay processes).…”

“…A general differential rate equation has the general form: ,− where the summations run the levels of the system. and are the populations of the levels and , and are rates between these states (Nd III –Yb III energy transfer or decay processes).…”

“…The theoretical thermometric parameters of Nd III /Yb III mixed CPs were modeled through (i) energy transfer rates between Ln ions, ,,, (ii) Judd–Ofelt intensity parameters, , (iii) Miyakawa–Dexter approach for multiphonon decay rates, and (iv) rate equations modeling. ,− These building blocks allow us to estimate the relative emission intensity of Yb III ( I Yb ) and Nd III ( I Nd ), resulting in the theoretical thermometric parameter Δ = I Yb / I Nd .…”

The role of lanthanide luminescence in advancing technology

“…8). 274,283 These newly emitted photons can then be absorbed by the PV cells, improving their solar harnessing capabilities. The process of upconversion involves the absorption of two or more low energy photons which are converted into a higher-energy photon.…”