Superhydrophobic luminous nanocomposites from CsPbX3 perovskite nanocrystals encapsulated in organosilica

Recent Advances in Ligand Design and Engineering in Lead Halide Perovskite Nanocrystals

“…[298][299][300] Successful silica growth has been demonstrated on LHP NCs through the addition of tetramethyl orthosilicate (TMOS), which can hydrolyze quickly, which is a necessity for LHP NCs during the silica growth process. [301][302][303][304] As an example of partial silica coating, Janus type silica-LHP NC hybrid structures could be formed through a sol-gel process (Figure 8A). [302] These CsPbX 3 -SiO 2 Janus particles were formed by mixing 0D Cs 4 PbBr 6 NCs with TMOS in nonpolar hexane and then rapidly adding H 2 O under vigorous oscillation.…”

Recent Advances and Challenges in Obtaining Stable CsPbX3 (X = Cl, Br, and I) Nanocrystals Toward White Light-Emitting Applications

“…3b). 72 The PL intensity of PNC@SSiP decreased significantly at 150 °C. Surprisingly, the PL intensity of PNC@SSiP after heating at 150 °C was restored to 20 °C.…”

“…The CsPbBr 3 PNCs@SSiP nanocomposites maintained >75% of their original PL intensity after 10 d of immersion in water, whereas pristine CsPbBr 3 PNCs demonstrated complete luminescence quenching in 1 h [68]. The PL intensity was 90% for the CsPbBr 3 PNCs@SSiP nanocomposites even after 90 d of exposure to air, whereas the PL intensity of pristine CsPbBr 3 PNCs was reduced to 20% within 10 d. The CsPbBr 3 PNCs@SSiP nanocomposites can preserve >80% of their original PL intensity, even after 120 h of UV irradiation, whereas pristine CsPbBr 3 PNCs demonstrated obvious quenching in 24 h. 72 The PL intensity of the CsPbBr 3 PNCs decreased to <20% over 10 d, whereas the PL intensity of the PNC@SSiP nanocomposites dropped only 10% of its original value even after 90 d (Fig. 3b).…”

“…These issues affect the crystal structure and luminescence properties of CsPbX 3 PNCs. 62 To resolve these problems, dual-encapsulation strategies such as passivation of CsPbX 3 PNCs with dual-shell hollow SiO 2 , 62 CsPbBr 3 @CA-SiO 2 , 78 CsPbX 3 PNCs@SiO 2 /poly(methylmethacrylate) (PMMA), 71 CsPbBr 3 PNCs/FSiO 2 /PPDMS, 59 DDAB-CsPbBr 3 PNCs@SiO 2 , 69 superhydrophobic nanocomposites, 72 and others have been used to protect PNCs under various environmental conditions. 62 Zhou et al proposed an in situ encapsulating approach to form superhydrophobic nanocomposites (CsPbBr 3 PNCs@SSiP) by integrating CsPbBr 3 PNCs into organosilica nanoparticles (Fig.…”

“…62 Zhou et al proposed an in situ encapsulating approach to form superhydrophobic nanocomposites (CsPbBr 3 PNCs@SSiP) by integrating CsPbBr 3 PNCs into organosilica nanoparticles (Fig. 3a), 72 which reduced the luminescence properties and enhanced the environmental stability (Fig. 3a).…”