Highly stable CsPbBr₃ perovskite quantum dot-doped tellurite glass nanocomposite scintillator

Abstract

All-inorganic cesium lead halide perovskite quantum dots (PQDs) appear to be promising scintillators for radiation detection; however, they are suffering from poor stabilities against light, heat, and moisture. Here a strategy of using AgCl as the nucleating agent is developed to facilitate growth of C s P b B r 3 PQDs in chemically inert tellurite glasses via controlled crystallization. The PQDs are uniformly dispersed and well protected in the dense glass matrix without aggregation. The nanocomposites thus obtained are featured by excellent optical transparency owing to the unique character of tellurite glass having a refractive index comparable to that of the C s P b B r 3 crystal. The X-ray excited radioluminescence properties are comprehensively studied. The results show that C s P b B r 3 PQD-doped tellurite glasses are highly stable against continuous X-ray irradiation and repeated heat-cooling cycles (from room temperature up to 573 K) without sacrificing their scintillation properties, thus appearing to be a potential scintillator for long-term practical applications.

Advanced Halide Scintillators: From the Bulk to Nano

“…Incorporation of CsPbX 3 NCs into a glass matrix has attracted considerable attention recently, because it promises superior stability compared with the plastic matrices. [ 341–346 ] The fabrication technique is a conventional melt‐quenching process. To crystallize CsPbX 3 NCs in the precursor glass, several hours of heat treatment are required, ranging from 340 °C for 15 h [ 343 ] to 550 °C for 4–18 h. [ 346 ]…”

“…[ 341–346 ] The fabrication technique is a conventional melt‐quenching process. To crystallize CsPbX 3 NCs in the precursor glass, several hours of heat treatment are required, ranging from 340 °C for 15 h [ 343 ] to 550 °C for 4–18 h. [ 346 ]…”

“…More recent studies clearly turned their attention to improved properties by RE elements (RE) doping, for example, Eu 3+ , [ 342,343 ] Ce 3+ , [ 346 ] and Lu 3+ . [ 345 ] Overall, RE doping caused significant improvement of transmittance that was accompanied by less light scattering in the sample, which is important to achieve high‐quality X‐ray imaging.…”

“…Improved stability against various conditions was successfully tested, for example, against humidity, [ 342,344,346 ] heat–cooling cycles, [ 343 ] and X‐ray exposure. [ 344 ] Exposing the material to high radiation doses (for 120 h by dose rate of 8 mGy air s −1 ) caused the radiation damage, but it was reversible by thermal annealing at 300 °C for 3 h. [ 345 ] Overall, this glass ceramics based on CsPbX 3 NCs was proven very promising for scintillation application.…”

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.…”