Secondary Crystallization Mechanism of Nanocrystalline Induced by Mechanical Ball Milling in Borosilicate Glass

Abstract

Herein, we first prepared polychromatic self-crystallized CsPb(Cl/Br/I) 3 perovskite nanocrystalline (PN) borosilicate glass by the high-temperature melting method. Then, the PN glass is exposed to frequent mechanical ball milling. Due to the high-energy mechanical force, the microstructure changes in borosilicate glass such as topological structure, chemical short-range order, and atomic rearrangement lead to the secondary crystallization of PN on the glass surface. Hence, the photoluminescence quantum yield (PLQY) of CsPbBr 3 PN glass has enhanced 120 times and that of CsPbBrI 2 PN glass has enhanced 74 times. Moreover, the prepared highly luminescent CsPbBr 3 PN glass has extremely large exciton binding energy (468 meV), which shows good thermal stability. Finally, by embedding the prepared PN glass powder in the polydimethylsiloxane matrix, multicolor luminescent flexible films are constructed, presenting application prospects in the flexible display field. This work deepens the understanding of how the microstructure change in glass influences the crystallization behavior of PN and resolves the challenge that PN glass cannot have high PLQY and stability at the same time.

Nanohybrids with switchable multicolour emission for anticounterfeiting

“…S4, ESI†) The change is evidence that some CsPbBr 3 QDs are anchored to the Tm/Yb:NaYF 4 UCP. As reported in previous literature, 27,28 mechanical ball milling can cause the secondary crystallization of QDs on a glass surface; thus, when the QD glasses are mechanically ball milled with the Tm/Yb:NaYF 4 UCP, some secondarily crystallized QDs will inevitably be anchored on the surface of the Tm/Yb:NaYF 4 UCP, which will lead to the negatively charged QDs adsorbing on the positively charged Tm/Yb:NaYF 4 UCP. 29…”

CsPbBr3@Glass@SiO2 Composite Materials with Ultrahigh Water Resistance and Thermal Reversibility of Photoluminescence

“…The existence of small amounts of CsPbBr 3 PQDs within the PG was caused by the grinding process that induced the crystallization of CsPbBr 3 PQDs in the glass matrix through mechanochemical crystallization. [41][42][43][44][45] In mechanochemical crystallization, the crystallization process of CsPbBr 3 PQDs is facilitated by external stress, but this process is incomplete. The digital photographs in Figure S2 (Supporting Information) show that the as-prepared plate-like PG would not emit photoluminescence under UV irradiation, but the PG after grinding would emit weak green PL emission under 365 nm UV irradiation.…”

Self-crystallization mechanism of CsPb(Cl/Br)3 in tellurite glass-ceramics controlled by phase separation

“…A series of tellurite glass and glass-ceramics with nominal composition (in mol%) of 60 TeO 2 -(25ÀX) ZnO -X MgO -15 [Cs 2 CO 3 -Pb(Cl/Br) 2 -Na(Cl/Br)] (X = 0, 5,10,15,20,25), are designed and the raw materials are carefully mixed and melted in alumina crucibles at 850 1C for 10 min without further quenching and heat treatment. When X = 0, 5, 10, 15, 20, 25, the glass samples are respectively named TZM1, TZM2, TZM3, TZM4, TZM5, and TZM6.…”

“…17 Therefore, compared with CsPbX 3 PeQDs in other glass matrices, the regulation methods are single, and the range of tunable spectra is narrow. [18][19][20] In this work, as the electron potential of Mg 2+ is similar to that of Zn 2+ , MgO is introduced into the Te-Zn-Na glass system to change the ratio of ZnO and MgO for phase separation. Then, the self-crystallized CsPb(Cl/Br) 3 PeQDs are successfully prepared by the melt-quenching method in tellurite glassceramic.…”

“…17 Therefore, compared with CsPbX 3 PeQDs in other glass matrices, the regulation methods are single, and the range of tunable spectra is narrow. 18–20…”