Highly Efficient and Stable Inorganic Perovskite Quantum Dots by Embedding into a Polymer Matrix

Zhu, Jinyang; Xie, Zhifeng; Sun, Xueke; Zhang, Siyuan; Pan, Gencai; Zhu, Yan; Dong, Biao; Bai, Xue; Zhang, Hanzhuang; Song, Hongwei

doi:10.1002/cnma.201800357

Cited by 42 publications

(26 citation statements)

References 45 publications

(76 reference statements)

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“…Among these methods, the coating technique is an effective method to enhance the optical performance and stability of NCs, which is due to their transparent characteristic, low cost, and the stability of coating components. Polymers, [ 34–40 ] metal‐organic frameworks [ 41,42 ] and inorganic shells [ 43–46 ] have been reported to improve the optical performance and stability of NCs. However, the coating techniques for NCs are found to lead to the uncontrolled morphologies and sizes.…”

Section: Introductionmentioning

confidence: 99%

Room Temperature Synthesis of Stable Zirconia‐Coated CsPbBr₃ Nanocrystals for White Light‐Emitting Diodes and Visible Light Communication

Chen

Cai

et al. 2021

Laser & Photonics Reviews

166

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The photoluminescence quantum yield (PLQY) of CsPbBr3 perovskite nanocrystals (NCs) prepared by the hot‐injection method can exceed 90%, which have attracted intensive attention for white light‐emitting diodes (WLEDs). However, the whole hot‐injection experiment requires air isolation and relatively high temperature. In addition, the poor stability of CsPbBr3 NCs impedes their applications. Here, a facile method is reported to synthesize CsPbBr3@ZrO2 NCs at room temperature in air. Owing to using ZrO2 coated CsPbBr3 NCs, the prepared CsPbBr3@ZrO2 NCs not only present a PLQY of 80% but also exhibit an enhanced stability to heat and moisture. Furthermore, WLEDs are fabricated with CsPbBr3@ZrO2 NCs and commercial red phosphors (CaAlSiN3:Eu2+) on blue LEDs chips. The fabricated WLEDs exhibit a correlated color temperature (CCT) of 4743 K and luminous efficacy as high as 64.0 Lm W–1. In addition, visible light communication with a high data rate of 33.5 Mbps is achieved using the WLEDs. This work provides a room temperature strategy to coat zirconia for CsPbBr3@ZrO2 NCs, benefiting to enhance the optical performance and stability, as well as the promotion of the great potentials in solid‐state illuminating and visible light communication applications.

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Section: Introductionmentioning

confidence: 99%

Room Temperature Synthesis of Stable Zirconia‐Coated CsPbBr₃ Nanocrystals for White Light‐Emitting Diodes and Visible Light Communication

Chen

Cai

et al. 2021

Laser & Photonics Reviews

166

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“…However, once water and oxygen permeate through the polymer, the perovskite film would degrade very fast. [ 16,17 ] Therefore, the inherently stable quasi‐2D perovskites exhibit huge potential for stable and highly efficient optoelectronic applications.…”

Section: Introductionmentioning

confidence: 99%

Highly Luminescent and Stable Green Quasi‐2D Perovskite‐Embedded Polymer Sheets by Inkjet Printing

Jia

Liu

et al. 2020

Adv Funct Materials

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Perovskite materials serve as promising candidates for display and lighting due to their excellent optical properties, including tunable bandgaps and efficient luminescence. However, their efficiency and stability must be improved for further application. In this work, quasi‐two‐dimensional (quasi‐2D) perovskites embedded in different polymers are prepared by inkjet printing to construct any luminescent patterns/pictures on the polymer substrates. The optimized quantum yield reaches over 65% by polyvinyl‐chloride‐based quasi‐2D perovskite composites. In addition, as‐fabricated perovskite−polymer composites with patterns show excellent resistance to abrasion, moisture, light irradiation, and chemical erosion by various solvents. Both quantum yield and lifetime are superior to those reported to date. These achievements are attributed to the introduction of the PEA+ cations to improve the luminance and stability of perovskite. This patterned composite can be useful for color‐conversion films with low cost and large‐scale fabrication.

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“…It can be observed that when the QDs-CsPbBr 3 solution was doped with various ratios of PMMA solution, the location of the PL peak barely shifted. This means that the PMMA does not influence the band structure of the QDs-CsPbBr 3 , but surrounds and protects the QDs-CsPbBr 3 to stabilize the material structure [41,42].…”

Section: Resultsmentioning

confidence: 99%

Influence of PMMA on All-Inorganic Halide Perovskite CsPbBr3 Quantum Dots Combined with Polymer Matrix

et al. 2019

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The poor stability of CsPbX3 quantum dots (QDs-CsPbX3) under wet conditions is still considered to be a key issue. In order to overcome this problem, this study presents a high molecular weight polymer matrix (polymethylmethacrylate, PMMA) incorporated into the QDs-CsPbBr3 to improve its stability and maintain its excellent optical properties. In this study, the Cs2CO3, PbO, Tetrabutylammonium Bromide (TOAB) powder, oleic acid, and toluene solvent were uniformly mixed and purified to prepare high-quality QDs powders. Then, hexane was used as a dispersing agent for the QD powder to complete the perovskite QDs-CsPbBr3 solution. Finally, a solution with different proportions of quantum dots CsPbBr3 and PMMA was prepared and discussed. In the preparation of thin films, firstly, a thin film with the structure of glass/QD-CsPbBr3/PMMA was fabricated in a glove box using a well-developed QDs-CsPbBr3 solution by changing the ratio of CsPbBr3:PMMA. The material analysis of QDs-CsPbBr3 thin films was performed with photoluminescence (PL), transmittance, absorbance, and transmission electron microscopy (TEM). The structures and morphologies were further examined to study the effect of doped PMMA on perovskite QDs-CsPbBr3.

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Highly Efficient and Stable Inorganic Perovskite Quantum Dots by Embedding into a Polymer Matrix

Cited by 42 publications

References 45 publications

Room Temperature Synthesis of Stable Zirconia‐Coated CsPbBr₃ Nanocrystals for White Light‐Emitting Diodes and Visible Light Communication

Room Temperature Synthesis of Stable Zirconia‐Coated CsPbBr₃ Nanocrystals for White Light‐Emitting Diodes and Visible Light Communication

Highly Luminescent and Stable Green Quasi‐2D Perovskite‐Embedded Polymer Sheets by Inkjet Printing

Influence of PMMA on All-Inorganic Halide Perovskite CsPbBr3 Quantum Dots Combined with Polymer Matrix

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Highly Efficient and Stable Inorganic Perovskite Quantum Dots by Embedding into a Polymer Matrix

Cited by 42 publications

References 45 publications

Room Temperature Synthesis of Stable Zirconia‐Coated CsPbBr3 Nanocrystals for White Light‐Emitting Diodes and Visible Light Communication

Room Temperature Synthesis of Stable Zirconia‐Coated CsPbBr3 Nanocrystals for White Light‐Emitting Diodes and Visible Light Communication

Highly Luminescent and Stable Green Quasi‐2D Perovskite‐Embedded Polymer Sheets by Inkjet Printing

Influence of PMMA on All-Inorganic Halide Perovskite CsPbBr3 Quantum Dots Combined with Polymer Matrix

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Product

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Room Temperature Synthesis of Stable Zirconia‐Coated CsPbBr₃ Nanocrystals for White Light‐Emitting Diodes and Visible Light Communication

Room Temperature Synthesis of Stable Zirconia‐Coated CsPbBr₃ Nanocrystals for White Light‐Emitting Diodes and Visible Light Communication