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. 2021 Feb 11;6(3):900–907. doi: 10.1021/acsenergylett.1c00052

Figure 2.

Figure 2

(a) PLQY of CsPbBr3/m-SiO2 composites that were prepared by employing different molten salts mixtures: KNO3–KBr, NaNO3–KBr, and KNO3–NaNO3–KBr and “standard” colloidal CsPbBr3 NCs, before (I) and after annealing at 180 °C in argon for (III) 2 h or (II) 3 h. (b) Time-dependent PLQY values of CsPbBr3/m-SiO2 composites and “standard” colloidal CsPbBr3 NCs immersed in water. (c) Time-dependent PLQY values of the CsPbBr3/m-SiO2 composite prepared with KNO3–NaNO3–KBr immersed in aqua regia (inset: photographs of CsPbBr3/m-SiO2 composite immersed in aqua regia for 3 and 9 days).