Figure 1. Impact of lower-lying levels on Boltzmann compliance. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure 1. Impact of lower-lying levels on Boltzmann compliance.

Caption

Figure 1. Impact of lower-lying levels on Boltzmann compliance. a Energy separation ΔElower between the lower thermally coupled level L1 and the nearest lower-lying level Llower for representative Ln3+ ions, together with the ratio of ΔElower to ΔE, where ΔE denotes the TCLs gap. b Extended rate-equation scheme that includes nonradiative relaxation from the two TCLs to Llower. c Simulated LIR in logarithmic form as a function of inverse temperature (1/T), and d corresponding temperature-dependent LIR curves for the ratio of ΔElower to ΔE between 0.1-fold and 3.0-fold.

Credit

Zuoling Fu et al.

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