Precipitating CsPbBr₃ quantum dots in boro-germanate glass with a dense structure and inert environment toward highly stable and efficient narrow-band green emitters for wide-color-gamut liquid crystal displays

Abstract

CsPbBr3 QDs were successfully precipitated in specially designed boro-germanate glass with super optical properties and improved stability for wide-color-gamut displays.

Recent advances in synthesis and application of perovskite quantum dot based composites for photonics, electronics and sensors

“…The CsPbBr 3 /TiO 2 composite showed even better stability against water for maintaining great optical properties after 3 months within it, and even the size and morphology of the composite kept unchanged along this time. The stability against UV light was also tested, 75% PL intensity of the original value was kept after 24 h. Besides the outstanding enhancement in stability, the exquisite core/shell structure could help reduce anion-exchange effect to some extent since the QDs were insulated from each other, and TiO 2 shell was also verified to promote charge carrier transfer [ [78], ionic compounds like NaNO 3 [79] and other organic materials like carboxybenzene [80]. And the synthesis strategies here are divided into template-free methods and template methods according to whether a template is adopted.…”

“…Melting-quenching with subsequent heat-treatment is always utilized for inorganic polymers including phospho-silicate glasses [24,93], tellurite-based glasses [94], borosilicate glasses [80,95] and boro-germanate glasses [80,96]. In this process, the properly designed glass matrix and the precursors of perovskite were firstly prepared and mixed together as powders.…”

Effect of Glass Composition on Luminescence and Structure of CsPbBr3 Quantum Dots in an Amorphous Matrix

“…For example, cationic doping of halide perovskite QDs can be achieved by adjusting the composition of the glass matrix [ 21 , 22 , 23 , 24 ], resulting in the observation of persistent luminescence from halide perovskite QDs [ 25 ]. The diffusion kinetics of precursor ions of CsPbX 3 QDs can be changed by adjusting the glass network structure [ 26 , 27 , 28 , 29 ], which affects the optical properties of the QDs in a glass matrix. The heterogeneous pair-bonds are existing on the interface between the QDs and the glass matrix [ 30 , 31 , 32 ], which leads to the formation of defects on the QDs surface, thus affecting the optical properties of the QDs embedded in the glass matrix.…”

Double Encapsulation of CsPbBr3 Perovskite Nanocrystals with Inorganic Glasses for Robust Color Converters with Wide Color Gamut

“…Similarly, CsPbBr 3 perovskite nanocrystals (PNCs), which have a very narrow emission bandwidth and high quantum efficiency but are susceptible to water, heat, and light, − have been recently developed as perovskite nanocrystals embedded glass (PNEG). − Encapsulating the CsPbBr 3 nanocrystals in inorganic glass matrix improves the stability of the PNCs. PNEG successfully demonstrated its narrow emission bandwidth and high quantum efficiency, along with enhanced stability compared to colloidal CsPbBr 3 nanocrystals. − Ye et al achieved high quantum efficiency, up to ∼80% (under 365 nm excitation) for CsPbBr 3 nanocrystal embedded boro-germanate glass.…”