Fig. 1. Morphology and XRD patterns of CsPbBr₃ PNCs

Fig. 2. Absorption and PL spectra of pristine and fluoride-treated CsPbBr₃ NCs

Fig. 3. Suppression of emission thermal quenching

Fig. 4. Comparison of CsPbBr₃ solution of pristine（①）and fluoride-doped（②）under natural and UV light after 7 days

Fig. 5. The TRPL spectra of CsPbBr₃ of pristine and with different DDA moiety, the solid line is fitting curve.