Water-stable and ion exchange-free inorganic perovskite quantum dots encapsulated in solid paraffin and their application in light emitting diodes

Wu, Haishan; Lin, Shan; Wang, Ruina; Xu, You; Chi, Yuwu

doi:10.1039/c8nr09384a

Cited by 47 publications

(37 citation statements)

References 51 publications

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“…The ASE behavior of the photopatterned CsPbBr 3 stripe in the cuvette was then studied under immersion in water (Figure S5, Supporting Information), which is known to cause rapid structural degradation in perovskite NCs. [ 14,38,39 ] As illustrated in Figure 5b, the photopatterned stripe was able to exhibit ASE at a reasonable F th ≈ 28.6 µJ cm −2 despite being totally submerged in water, marking, to the best of our knowledge, a first in perovskite‐based ASE. The ASE stability of the water‐immersed structures were subsequently tested and benchmarked against structures exposed to ambient air and those immersed in cyclohexane.…”

Section: Figurementioning

confidence: 82%

Pulsed Laser Photopatterning of Cesium Lead Halide Perovskite Structures as Robust Solution‐Processed Optical Gain Media

Tan

Chan

2020

Adv Materials Technologies

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Solution‐processed optical gain media such as thin films of colloidal semiconductor nanocrystals promise ease of fabrication and scalable production while offering a spectrally wide range of emission colors. However, depositing such gain media in a size‐ and shape‐specific manner at a precise location on a substrate can be highly challenging. In this work, a facile approach for fabricating solution‐processed cesium lead halide perovskite structures of any arbitrary shape and size from their nanocrystal counterparts via a pulsed laser photopatterning process is demonstrated. The photopatterned structures resist solvation in both polar and nonpolar solvents, allowing for the straightforward removal of unpatterned regions. Their robustness is attributed to the ligand‐removal, sintering, and photoannealing of the nanocrystals at the site of irradiation. Concomittantly, the photopatterning process results in lengthened Auger‐dominated biexciton lifetimes and larger absorption cross‐sections that permit relatively low amplified spontaneous emission thresholds. It is shown that the photopatterning process may be used to fabricate cesium lead halide based gain media capable of multiwavelength emission, orientation‐dependent wavelength of emission, as well as functional operation while fully immersed in various solvents. It is envisioned that the photopatterning process may be extended to other perovskite systems to include applications beyond those requiring light‐emission.

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Section: Figurementioning

confidence: 82%

Pulsed Laser Photopatterning of Cesium Lead Halide Perovskite Structures as Robust Solution‐Processed Optical Gain Media

Tan

Chan

2020

Adv Materials Technologies

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“…Chi et al. have encapsulated green, blue and red fluorescence‐emitting CsPbX 3 QDs in hydrophobic solid paraffin to get bright luminescent paraffin‐CsPbX 3 QDs composites, the composite also displayed favourable water‐stable [98] . Liu et al.…”

Section: Approaches For Enhancement the Stability Of Cspbx3 Perovskitementioning

confidence: 99%

Recent Progress in CsPbX₃ Perovskite Nanocrystals for Enhanced Stability and Photocatalytic Applications

Zhao

Wang

et al. 2021

ChemNanoMat

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Since the first discovery of CsPbX3 perovskite in 1893, exponentially increasing investigations on the tunable crystal structure, enhancement of stability against moisture, thermal, oxygen and light, and modulation of physicochemical properties have struggled to expand applications in photocatalysis. Here, the latest researches on modifying the structure and surface of CsPbX3 perovskite to achieve water, air, high temperature and light stability are systematically summarized, including surface passivation engineering, encapsulation strategy, semiconductor composite fabrication, and other strategies. Moreover, the major challenges of CsPbX3 perovskite act as photocatalyst for hydrogen evolution, degradation of organic dyestuff, CO2 reduction and photocatalytic organic synthesis are highlighted, and some perspectives from the current progress in development of CsPbX3‐based photocatalyst are given. This paper will provide a comprehensive perspective and inspire more constructive thoughts for further expanding the application boundaries of CsPbX3 perovskite.

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“…There are many ways to fabricate the CsPbBr 3 quantum dots (QDs), including hot injection, 25,26 ion exchange 27 and chemical vapor deposition. 28 In this paper, the perovskite QDs were synthesized by the hot injection method, which is widely used.…”

Section: Preparation Of Cspbbr 3 Quantum Dotsmentioning

confidence: 99%

A high-precision, template-assisted, anisotropic wet etching method for fabricating perovskite microstructure arrays

Lü

Wang

et al. 2020

RSC Adv.

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Water-stable and ion exchange-free inorganic perovskite quantum dots encapsulated in solid paraffin and their application in light emitting diodes

Abstract: Perovskite quantum dots encapsulated in solid paraffin (P-PQDs) are water-stable and ion exchange-free, and show promising application in LEDs.

Cited by 47 publications

References 51 publications

Pulsed Laser Photopatterning of Cesium Lead Halide Perovskite Structures as Robust Solution‐Processed Optical Gain Media

Pulsed Laser Photopatterning of Cesium Lead Halide Perovskite Structures as Robust Solution‐Processed Optical Gain Media

Recent Progress in CsPbX₃ Perovskite Nanocrystals for Enhanced Stability and Photocatalytic Applications

A high-precision, template-assisted, anisotropic wet etching method for fabricating perovskite microstructure arrays

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Water-stable and ion exchange-free inorganic perovskite quantum dots encapsulated in solid paraffin and their application in light emitting diodes

Abstract: Perovskite quantum dots encapsulated in solid paraffin (P-PQDs) are water-stable and ion exchange-free, and show promising application in LEDs.

Cited by 47 publications

References 51 publications

Pulsed Laser Photopatterning of Cesium Lead Halide Perovskite Structures as Robust Solution‐Processed Optical Gain Media

Pulsed Laser Photopatterning of Cesium Lead Halide Perovskite Structures as Robust Solution‐Processed Optical Gain Media

Recent Progress in CsPbX3 Perovskite Nanocrystals for Enhanced Stability and Photocatalytic Applications

A high-precision, template-assisted, anisotropic wet etching method for fabricating perovskite microstructure arrays

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Product

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Recent Progress in CsPbX₃ Perovskite Nanocrystals for Enhanced Stability and Photocatalytic Applications