In-situ fabricated anisotropic halide perovskite nanocrystals in polyvinylalcohol nanofibers: Shape tuning and polarized emission

Meng, Linghai; Yang, Cheng; Jin, Meng; Wang, Yongzhi; Ge, Yong; Shao, Ziqiang; Zhang, Guofeng; Rogach, Andrey L.; Zhong, Haizheng

doi:10.1007/s12274-019-2353-4

Cited by 57 publications

(61 citation statements)

References 57 publications

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“…Additionally, when large amounts of QDs gather, they tend to attract each other and self‐assemble to ordered agglomerates in a large area, which can enable polarized emission without further alignment processes 23. As a result, several groups have observed the polarization property of perovskite QDs with DOLP values from 0.28 to 0.54 2,23,39,42…”

Section: Resultsmentioning

confidence: 99%

Giant Optical Anisotropy of Perovskite Nanowire Array Films

Lin

Kang

et al. 2020

Adv Funct Materials

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Polarizers play a key role in generating polarized light for display, imaging, and data communication, but adoption often suffers from high optical loss. Recently, due to superior optoelectronic properties, halide perovskites have been widely developed for lighting applications; however, highly polarized emission (polarization degree >0.8) has not yet been realized with perovskites. Herein, by incorporating inkjet printing and an anodic aluminum oxide (AAO) confinement strategy, highly ordered perovskite nanowire (NW) arrays are demonstrated for anisotropic optical applications. The optical device based on perovskite NW arrays reveals a high photoluminescence external quantum efficiency of 21.6% and emits highly polarized light with polarization degree up to 0.84. The highly polarized emission from perovskite NW arrays has potential to considerably reduce the optical loss of polarizers, which may attract great interest in developing polarized light sources for next‐generation optoelectronic applications.

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Section: Resultsmentioning

confidence: 99%

Giant Optical Anisotropy of Perovskite Nanowire Array Films

Lin

Kang

et al. 2020

Adv Funct Materials

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“…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.…”

Section: Fabrication Of Fiber‐shaped Halide Perovskite Composites Andmentioning

confidence: 99%

“…revealed that OIHP morphology could be adjusted between quasi spherical to the elongated rod like shape of nanocrystals domain even for Br‐ based OIHP nanocrystals as loading ratio of HP precursor concentration was varied in blend electrospinning solution. [ 112 ] As a consequence of the elongated fiber geometry, unidirectional alignment of such anisotropic nanoparticles along the nanofiber axis endowed polarized optical properties.…”

Section: Fabrication Of Fiber‐shaped Halide Perovskite Composites Andmentioning

confidence: 99%

“…With a similar perspective, the alignment of anisotropic OIHP nanostructures through long axis was presented for OIHP NC containing PVA nanofiber system. [ 112 ] The work demonstrated by Meng et al. also revealed that the shape of perovskite nanocrystals could be modulated by controlling solution concentration in electrospinning.…”

Section: Photonic and Optoelectronic Applications Of Luminous Perovskmentioning

confidence: 99%

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

Ercan

Chen

2020

Macromol. Rapid Commun.

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Perovskite nanomaterials have been revealed as highly luminescent structures regarding their dimensional confinement. In particular, their promising potential lies behind remarkable luminescent properties, including color tunability, high photoluminescence quantum yield, and the narrow emission band of halide perovskite (HP) nanostructures for optoelectronic and photonic applications such as lightning and displaying operations. However, HP nanomaterials possess such drawbacks, including oxygen, moisture, temperature, or UV lights, which limit their practical applications. Recently, HP‐containing polymer composite fibers have gained much attention owing to the spatial distribution and alignment of HPs with high mechanical strength and ambient stability in addition to their remarkable optical properties comparable to that of nanocrystals. In this review, the fabrication methods for preparing nano–microdimensional HP composite fiber structures are described. Various advantages of the luminescent composite nanofibers are also described, followed by their applications for photonic and optoelectronic devices including sensors, polarizers, waveguides, lasers, light‐down converters, light‐emitting diode operations, etc. Finally, future directions and remaining challenges of HP‐based nanofibers are presented.

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“…Most LHP‐NCs can be synthesized through a facile solution reaction, e.g., ligand‐assisted reprecipitation in an ambient environment and hot injection in a nitrogen atmosphere, followed by dispersion in a low dielectric constant solvent, e.g., toluene, to form a homogeneous colloidal solution . In situ antisolvent processing is another technique that can be used to fabricate high‐quality LHP‐NCs, mostly in the form of solid thin films, using precursor solutions …”

Section: Introductionmentioning

confidence: 99%

Light Generation in Lead Halide Perovskite Nanocrystals: LEDs, Color Converters, Lasers, and Other Applications

Yan

Tan

et al. 2019

Small

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Facile solution processing lead halide perovskite nanocrystals (LHP‐NCs) exhibit superior properties in light generation, including a wide color gamut, a high flexibility for tuning emissive wavelengths, a great defect tolerance and resulting high quantum yield; and intriguing electric feature of ambipolar transport with moderate and comparable mobility. As a result, LHP‐NCs have accomplished great achievements in various light generation applications, including color converters for lighting and display, light‐emitting diodes, low threshold lasing, X‐ray scintillators, and single photon emitters. Herein, the considerable progress that has been made thus far is reviewed along with the current challenges and future prospects in the light generation applications of LHP‐NCs.

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In-situ fabricated anisotropic halide perovskite nanocrystals in polyvinylalcohol nanofibers: Shape tuning and polarized emission

Cited by 57 publications

References 57 publications

Giant Optical Anisotropy of Perovskite Nanowire Array Films

Giant Optical Anisotropy of Perovskite Nanowire Array Films

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

Light Generation in Lead Halide Perovskite Nanocrystals: LEDs, Color Converters, Lasers, and Other Applications

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