Broadband absorption mechanism based on quantum dot glass for filtering field

Abstract

Traditional filters are faced with the problems of high price and complex preparation process. It is necessary to find a new method or material to make up for these shortcomings. In this Letter, C s P b B r 3 nanocrystals with controllable size were prepared in a tellurite glass matrix by a simple and effective heat treatment process. The absorption wavelength of C s P b B r 3 quantum dots gradually shifted to red due to the quantum confinement effect. In addition, the intrinsic photoluminescence intensity of C s P b B r 3 quantum dots was reduced by C e 4 + -doped quantum dot C s P b B r 3 glass, which could shield a short wavelength of 200–530 nm. The uniformly distributed quantum dots ensure high transmittance ( > 80 % ) of a long wavelength (560–800 nm), demonstrating that the quantum dot glass material has a broad application prospect as a shortwave shielding material.

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.…”

“…However, there are only a few studies on CsPbX 3 PeQDs encapsulated in the tellurite glass system, and only the synthesis of CsPbBr 3 PeQDs has been realized by heat treatment. [14][15][16] In the existing studies, the widest tunable spectral range of CsPbBr 3 PeQDs is limited from 469 nm to 520 nm in tellurite glass. 17 In addition, the spectra regulation of CsPbBr 3 PeQDs in tellurite glass can only be achieved by adjusting the temperature and time of heat treatment or doping impurity ions into CsPbBr 3 PeQDs.…”

Effect of ZnO on the crystallization and photoluminescence of CsPbI3 perovskite quantum dots in borosilicate glasses

“…For instance, Liu et al first reported that all inorganic CsPbBr 3 QDs could be precipitated in phosphate glasses by annealing 9 . So far, CsPbX 3 perovskite QDs have been successfully precipitated in various glass matrices, such as borosilicate, 10–12 phosphosilicate, 13 tellurite glasses 14,15 . Recently, Zhang et al.…”

“…9 So far, CsPbX 3 perovskite QDs have been successfully precipitated in various glass matrices, such as borosilicate, [10][11][12] phosphosilicate, 13 tellurite glasses. 14,15 Recently, Zhang et al reported that red light-emitting CsPbI 3 and CsPbCl 3 QDs could be simultaneously precipitated in the glass. Due to the effective reabsorption, CsPbCl 3 :CsPbI 3 hybrid nanocrystals (NCs) show higher PLQY and higher PL intensity than pure CsPbI 3 NCs.…”

Precipitation of cesium lead halide perovskite nanocrystals in glasses based on liquid phase separation

“…After the pioneering work by Ai et al, CsPbX 3 PNCs have been successfully precipitated in borosilicate glass, 31,32 borogermanate glass, 33,34 borophosphate glass, 30,35 tellurite glasses, 36,37 oxyfluoride glasses, 38 and chalcogenide glasses. 39 Potential applications of these CsPbX 3 PNCs embedded glasses such as lightemitting diodes, 33,36,37 anticounterfeitings, 40 data storage media, 41 scintillators, 42 color filters, 43 and undersea water communications 44 have been demonstrated.…”