Fig. 2: X-ray excited ultralong phosphorescence in AlN SCs. | Nature Communications

Fig. 2: X-ray excited ultralong phosphorescence in AlN SCs.

From: X-ray radiation excited ultralong (>20,000 seconds) intrinsic phosphorescence in aluminum nitride single-crystal scintillators

Fig. 2

a Time-dependent PL spectra of the AlN SC, showing an ultralong (>20,000 s) UV phosphorescence. b Steady-state PL spectra after turning off X-ray for 0 and 7200 s. c Decay curve of the UV and yellow phosphorescence, which are well fitted to bi-exponential decay function. The calculated Tds of UV and yellow phosphorescence are 9360 and 4320 s, respectively. d Temperature-dependent PL spectra under X-ray excitation. e, f Extracted FWHM and intensities plotted with temperature, demonstrating that UV and yellow emission have thermal-related effect. g–i show similar temperature effect of the phosphorescence.

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