Hybridization of CsPbBr₃ Perovskite Nanocrystals with Polymer Nanofiber to Improve their Luminescence Stability

Abstract

All-inorganic cesium lead halide perovskite nanocrystals (IPNCs) exhibit exceptional optical properties but the low chemical and structural stability has restricted their longterm applications. According to previous studies, hybridization of IPNCs with other matrix materials provides an efficient method for improving their optical stability. Here, we develop a new strategy to synthesize a chemically and structurally stable CsPbBr 3 perovskite material using polymer nanofiber as the [a]

Ultrafast Charge Delocalization Dynamics of Ambient Stable CsPbBr3 Nanocrystals Encapsulated in Polystyrene Fiber

“…Cs 4d 5/2 and 4d 3/2 appeared to be overlapped with the Br 3d spectrum with the binding energies of 74.1 and 76.8 eV (Figure 4 d). All the observed binding energy values are well matched with earlier reports [30–32] . The above results confirm the successful encapsulation of CsPbBr 3 NCs inside the PS fiber.…”

Device Engineering for All-Inorganic Perovskite Light-Emitting Diodes

“…Shi et al presented an approach to combine localized surface plasmons and core/shell nanostructure configuration in a single PeLED, where the PeLEDs without encapsulation presented a substantially improved operation stability against water and oxygen degradation (30-day storage in air ambient, 85% humidity) [266]. Another effective approach is the hybridization of CsPbX 3 with other matrix materials (e.g., synthesizing a chemically and structurally stable CsPbBr 3 perovskite material by using polymer nanofiber as the protective layer [267], presenting a high molecular weight polymer matrix (polymethylmethacrylate, PMMA) to incorporate into CsPbBr 3 QDs to improve its stability and maintain excellent optical properties [268]). Apart from the exploration of stable perovskite emitters, the further enhancement of device engineering is also urgently necessary (e.g., the use of stable inorganic charge transport layers, the exploitation of insulators, the introduction of advanced encapsulation techniques) [269,270,271,272,273,274].…”

Nano–Micro Dimensional Structures of Fiber‐Shaped Luminous Halide Perovskite Composites for Photonic and Optoelectronic Applications

“…In this technique, insulating polymeric materials were used as matrix to encapsulate nanostructures or accompany conjugated polymers. Over the past 5 years, the polymer fiber matrixes have been successfully electrospun into HP based luminescent fibers, such as polyvinylpyrolidone (PVP), [ 101–104 ] polyacrylonitrile (PAN), [ 105,106 ] poly(methlymethacrylate) (PMMA), [ 107–109 ] polystyrene (PS), [ 110–114 ] polyvinyl alcohol (PVA), [ 112,115 ] polyvinyl acetate (PVAc), [ 114 ] polyurethane (PU), [ 116,117 ] styrene‐butadiene‐styrene (SBS), [ 118,119 ] and poly(vinylidene fluoride) (PVDF). [ 120,121 ] Since electrospinning requires chain entanglement and perovskite materials are not being able to electrospun without any matrix agent, polymer selection is crucially important concerning to solubility and spinnability.…”

“…[ 113 ] In a different approach, IHP QDs were incorporated into PVP/PAN fiber matrix assisted by the QD pre‐synthesis. [ 103 ] Nevertheless, this self‐assisted approach required additional synthesis of HP QDs, even though exhibiting a relatively good dispersion for composite fibers. Besides, pre‐synthesis assisted electrospinning possess drawbacks such as limitation of solvent option, including toluene and chloroform, to the disperse of both HP QD precursors meanwhile dissolving polymer as well as the compatibility issue of solvent for electrospinning.…”