Table 1 Relevant parameters for the thermometric performance of narrow-line emitting Al0.993Cr0.007B4O6N (see Fig. 2) and α-Al1.993Cr0.007O3 (see Fig. S7)

From: Ratiometric Boltzmann thermometry with Cr3+ in strong ligand fields: Efficient nonradiative coupling for record dynamic working ranges

 

Al0.993Cr0.007B4O6N

α−Al1.993Cr0.007O3

Ton

<77 K

<50 Ka

∆E21

(619 ± 2) cm−1

(532 ± 7) cm−1

Sr(300 K)

0.99% K−1

0.85% K−1

k1r

0.030 ms−1

0.189 ms−1

Topt

[260 K, 445 K]

[225 K, 380 K]

T1/2

570 Kb

463 Kb

  1. abased on Eq. 5 with literature-reported knr(0) from transient absorption measurements66
  2. bsee Fig. S9
  3. For more explanations, see text
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