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Fig. 13
Normalised FIR-cm SEDs show that the emissivity slopes segregate into two band-gap groups, one with β ~ 1.3 for Eg ~ 0 eV and the other with β ~ 2 for Eg ≳ 0.5 eV. The line designations are as per Fig. 7. The dashed blue lines indicate slopes of −1.0, −1.3, −1.5, −1.8 and − 2.0, from top to bottom.
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