Color-stable water-dispersed cesium lead halide perovskite nanocrystals

Gómez, Leyre; Weerd, Chris de; Hueso, José L.; Gregorkiewicz, T.

doi:10.1039/c6nr08892a

Cited by 114 publications

(90 citation statements)

References 51 publications

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“…More recently, Gomez et al 67. reported the application of solid lipid structures to encapsulate CsPbBr 3 NCs that were stable up to 2 months in water, albeit at a low PLQY (around 11%) likely due to initial water degradation.…”

Section: Discussionmentioning

confidence: 99%

Giant five-photon absorption from multidimensional core-shell halide perovskite colloidal nanocrystals

Chen

Bhaumik²,

Veldhuis³

et al. 2017

Nat Commun

193

280

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Multiphoton absorption processes enable many technologically important applications, such as in vivo imaging, photodynamic therapy and optical limiting, and so on. Specifically, higher-order nonlinear absorption such as five-photon absorption offers significant advantages of greater spatial confinement, increased penetration depth, reduced autofluorescence, enhanced sensitivity and improved resolution over lower orders in bioimaging. Organic chromophores and conventional semiconductor nanocrystals are leaders in two-/three-photon absorption applications, but face considerable challenges from their small five-photon action cross-sections. Herein, we reveal that the family of halide perovskite colloidal nanocrystals transcend these constraints with highly efficient five-photon-excited upconversion fluorescence—unprecedented for semiconductor nanocrystals. Amazingly, their multidimensional type I (both conduction and valence band edges of core lie within bandgap of shell) core–shell (three-dimensional methylammonium lead bromide/two-dimensional octylammonium lead bromide) perovskite nanocrystals exhibit five-photon action cross-sections that are at least 9 orders larger than state-of-the-art specially designed organic molecules. Importantly, this family of halide perovskite nanocrystals may enable fresh approaches for next-generation multiphoton imaging applications.

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Section: Discussionmentioning

confidence: 99%

Giant five-photon absorption from multidimensional core-shell halide perovskite colloidal nanocrystals

Chen

Bhaumik²,

Veldhuis³

et al. 2017

Nat Commun

193

280

View full text Add to dashboard Cite

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“…[64,86] They also tend to degrade under exposure to high temperature [52] or high-energy electron beams. To overcome these obstacles, several groups explored several solutions, such as encapsulation strategy [137,138] and surface coating method. To overcome these obstacles, several groups explored several solutions, such as encapsulation strategy [137,138] and surface coating method.…”

Section: Stability Issuesmentioning

confidence: 99%

“…To overcome these obstacles, several groups explored several solutions, such as encapsulation strategy [137,138] and surface coating method. [137,138] In the former case, it was found that the PL QY of the perovskite−polymer nanocomposite films undergoes no change under continuous water-soaking for >4 months. [137,138] In the former case, it was found that the PL QY of the perovskite−polymer nanocomposite films undergoes no change under continuous water-soaking for >4 months.…”

Section: Stability Issuesmentioning

confidence: 99%

“…[137] In addition, Raja and collaborators claimed that photostability of the polymer-encapsulated perovskite NCs is greatly enhanced, sustaining >10 10 absorption events per QD prior to photodegradation. [138] Similarly, several groups presented a coating method, in which mesoporous silica (MPS) or polyhedral oligomeric silsesquioxane (POSS) were used as a protective layer for CsPbX 3 NCs. [138] Similarly, several groups presented a coating method, in which mesoporous silica (MPS) or polyhedral oligomeric silsesquioxane (POSS) were used as a protective layer for CsPbX 3 NCs.…”

Section: Stability Issuesmentioning

confidence: 99%

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Fully‐Inorganic Trihalide Perovskite Nanocrystals: A New Research Frontier of Optoelectronic Materials

2017

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All-inorganic trihalide perovskite nanocrystals (NCs) are emerging as a new class of superstar semiconductors with excellent optoelectronic properties and great potential for a broad range of applications in lighting, lasing, photon detection, and photovoltaics. This article provides an up-to-date review on the developments of fully-inorganic trihalide perovskite NCs by emphasizing their controllable solution fabrication strategies, structural phase transformation, tunable optoelectronic properties, stability, as well as their photovoltaic and optoelectronic applications. Among the properties to be surveyed, particular focus is on the size-, shape-, and composition-dependent photoluminescence properties. Finally, by identifying new challenges, suggestions are provided for further research and potential development of this area.

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“…[6,7,[23][24][25] We choose the MAPbBr 3 -NCs as the reference sample due to the synthesis conditions are relatively mature, and the MPACs www.advmat.de www.advancedsciencenews.com (up to five-photon) of MAPbBr 3 NCs have been investigated. [31] To get more insights into the enhancement of nonlinear optical performance of ZJU-28⊃MAPbBr 3 , time-resolved PL measurements using single-photon (436 nm) and multiphoton (for example, 2PE (960 nm), 3PE (1440 nm), 4PE (1800 nm) and 5PE (2100 nm)) excitation of MAPbBr 3 NCs and ZJU-28⊃MAPbBr 3 were performed ( Figure S11, Supporting Information). We have previously characterized that the synthesized MAPbBr 3 -NCs size is about 9 nm and the PLQY is 87.9%, which are basically consistent with the reported data.…”

Section: Multiphoton Excitationmentioning

confidence: 99%

Confinement of Perovskite‐QDs within a Single MOF Crystal for Significantly Enhanced Multiphoton Excited Luminescence

et al. 2018

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and then generate a high-energy photon through radiation transitions from the excited state. Compared with single photon excited luminescence, MPE luminescence has the advantages of stronger spatial confinement, longer penetration depth, smaller biological damage, and less Rayleigh scattering, so the high-order MPE luminescence materials have great potential applications in bioimaging, 3D optical data storage, sensing, and so on, but basically have not been fulfilled yet, [1][2][3][4][5] mainly because of the big challenge and difficulty to realize high-order MPE luminescence. Even for those materials exhibiting such MPE luminescence, the five-photon excited luminescence phenomena can be only observed in the dispersed solutions of either organic chromophore molecules or core-shell halide perovskite semiconductor nanocrystals (MAPbBr 3 /(OA) 2 PbBr 4 ) in order to diminish the aggregation-caused quenching (ACQ) while still with quite low multiphoton action cross-sections (MPACs), or have poor stability without any encapsulation approaches (The MPAC (ησ n ) is the product of photoluminescence quantum yield (PLQY, η) and multiphoton absorption cross-section (σ n ), the parameter to evaluate the multiphoton excited luminescence brightness). [6,7] The deficiency of bulky high-order MPE luminescence solid single crystals with low excitation threshold have further limited the exploration and implementation of such MPE materials into miniaturization and device, and thus their practical applications.Some porous materials such as mesoporous silica and porous alumina have been utilized to confine dye molecules and perovskite nanoparticles and thus to diminish the ACQ and to develop the solid-state luminescence. [4,[8][9][10][11] The emergence of a new type of porous materials, metal-organic frameworks (MOFs), has provided the significant promise to provide much better confinement for the potentially luminescent dye molecules and perovskite nanoparticles because of their more tunable pores/cages and specific sites to introduce strong recognitions. Indeed, we have recently realized a three-photon excited emissive material ZJU-68⊃DMASM through an exact match of a dye molecule with the pores of the metal-organic framework although high-order MPE luminescence solid single The development of the photostable higher-order multiphoton-excited (MPE) upconversion single microcrystalline material is fundamentally and technologically important, but very challenging. Here, up to five-photon excited luminescence in a host-guest metal-organic framework (MOF) and perovskite quantum dot (QD) hybrid single crystal ZJU-28⊃MAPbBr 3 is shown via an in situ growth approach. Such a MOF strategy not only results in a high QD loading concentration, but also significantly diminishes the aggregationcaused quenching (ACQ) effect, provides effective surface passivation, and greatly reduces the contact of the QDs with the external bad atmosphere due to the confinement effect and protection of the framework. These advantages make the resulting ZJU-28⊃MAPb...

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Color-stable water-dispersed cesium lead halide perovskite nanocrystals

Cited by 114 publications

References 51 publications

Giant five-photon absorption from multidimensional core-shell halide perovskite colloidal nanocrystals

Giant five-photon absorption from multidimensional core-shell halide perovskite colloidal nanocrystals

Fully‐Inorganic Trihalide Perovskite Nanocrystals: A New Research Frontier of Optoelectronic Materials

Confinement of Perovskite‐QDs within a Single MOF Crystal for Significantly Enhanced Multiphoton Excited Luminescence

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