A deep-dyeing strategy for ultra-stable, brightly luminescent perovskite-polymer composites

Abstract

To fulfill the requests of highly vivid colors in displays and customized spectra in solid-state lighting (SSL), a cost-effective approach to create color-tunable downconverters with narrow emission spectra is in...

Stability Enhancements on Methylammonium Lead‐Based Perovskite Nanoparticles: the Smart Use of Host Matrices

“…All these parameters will affect the amount and diffusion of the precursors within the host cavities (that act as nanoreactors), which at the end will have a correlation with the final morphology of the perovskites formed. Thus, the encapsulation of the nanocrystals aims to Swelling-deswelling method > 3 years in water [27] Polystyrene (PS) MAPbBr 3 UV-crosslinking polymerization in microfluidic reactor > 168 days ambient conditions [28] enhance their stability while keeping their highest photoluminescence. Even though the use of host matrices for stabilizing perovskite nanoparticles has tremendous advantages and is one of the best strategies, still some limitations remain unsolved.…”

“…For this case, the swelling‐deswelling method was modified [25] by the deep‐dyeing strategy [26] . With this method, it is possible to directly convert commercially available polymer matrices (for example, polyethylene terephthalate (PET)) into polymer‐protected perovskite composites with excellent environmental stability [27] . The process starts with a high enough temperature that swells the polymer matrix to allow widening the polymer matrix with the precursor solution containing the perovskite precursors and surfactants in form of organic amine and organic acid.…”

Luminescent Nanomaterials for Energy-Efficient Display and Healthcare

“…Therefore, an advanced SDM strategy, named the deep-dyeing method was developed to convert highly inert polymer matrices into high-efficiency PPCs with superior stability. 80 By full immersion of the inert solvent-resistant polymer (e.g., polyethylene terephthalate, PET) at a suitable high temperature, the polymer chains were well swelled, allowing the perovskite precursors to enter the interior of the polymer matrix. And after sufficient deswelling, the luminescent deepdyed PPCs with different form factors were fabricated (see Figure 3d).…”

Dual-Protective CsPbX3 Perovskite Nanocomposites with Improved Stability for Upconverted Lasing and Backlight Displays

“…Based on the previously successfully developed swelling-reducing microcapsule (SDM) method, a deep staining strategy is proposed, which can immediately transfer commercial solvent-tolerant polymer matrices such as poly­(ethylene terephthalate) to polymer-protected deep-dyed perovskite polymer composites. In addition, the composites have excellent color adjustability, superior pure color, and outstanding environmental stability …”

“…In addition, the composites have excellent color adjustability, superior pure color, and outstanding environmental stability. 35 Here, oxide glass serving as a host has been regarded as an effective strategy for stabilizing PQDs owing to the outstanding mechanical, chemical, and thermal stabilities of glass matrices. 29,36−38 We proposed a strategy to embed CsPbBr 3 and CsPb(Cl/Br) 3 perovskite NCs into a more robust and stable medium, such as an inorganic borosilicate glass matrix.…”