Stability of CsPbX3 (X=Br, Cl, I) perovskite nanocrystalline

Xu, Tiancheng; Liu, Bin; Liu, Zongming; Li, Jinkai

doi:10.1016/j.jssc.2022.123536

Cited by 10 publications

(6 citation statements)

References 81 publications

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“…Figure 1b shows the UV-vis and the PL of the pristine and Cys-processed CQDs. The absorption and emission peaks of pristine CQDs are located at 680 and 685 nm, which are identified as belonging to CQDs [17,33]. After Cys post-processing, the PL of the CQDs shows a slight redshift to 686-688 nm with different concentrations of Cys, which are marked in Figure 1d.…”

Section: Resultsmentioning

confidence: 94%

“…Although long-chain organic ligands such as oleic acid (OA) and oleyamine (OAm) are usually used to surface treat and stabilize the CQDs, they are easily detached from the surface of CQDs during the purification process because of the poor binding force between the ligands and the surface ions [14,15]. The ligand loss increases the surface defects of the perovskites, which not only induces detrimental non-radiative recombination paths but also accelerates the phase transition, seriously limiting its application and development [16,17].…”

Section: Introductionmentioning

confidence: 99%

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Enhancing Photoluminescence and Stability of CsPbI3 Perovskite Quantum Dots via Cysteine Post-Processing

2022

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Red-emitting cesium lead iodide (CsPbI3) perovskite quantum dots (CQDs) are extremely unstable due to their structural composition and the weak binding force of ligands on the surface of nanocrystals. Herein, we report an effective method to enhance the photoluminescence and stability of CQDs by simple post-processing with cysteine (Cys). Compared to the pristine CQDs with a photoluminescence quantum yield (PLQY) of 38.61%, the Cys-processed one has fewer surface defects, obtaining a PLQY of 70.77%, nearly twice as much as the pristine samples, and, simultaneously, the Cys-processed CQDs retained more than 86% of the initial PL intensity after 20 days of storage in the atmosphere. This research provides a new idea for the preparation of high-performance and red-emitting quantum dots.

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Enhancing Photoluminescence and Stability of CsPbI3 Perovskite Quantum Dots via Cysteine Post-Processing

2022

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“…Nowadays, the research dealing with perovskites is vigorously growing due to their distinguished optical performance, adjustable emission, and simple processing, which is promoting their practical applications in solar cells, [47] sensors, [48] HD display, [49] information encryption, [50] among others. However, their intrinsic quality of ionic crystals makes them extremely unstable and easy to decompose especially in wet environment.…”

Section: Pfms Constructed From Perovskitementioning

confidence: 99%

Preparation and Applications of Polydimethylsiloxane‐Based Fluorescent Materials

Dong

Zhong

et al. 2023

Macromol. Rapid Commun.

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In the past few years, fluorescent materials have received significant attention due to their fascinating luminescent properties and wide-ranging applications. Polydimethylsiloxane (PDMS) has also attracted the interest of many researchers due to its remarkable performances. The combination of fluorescence and PDMS will undoubtedly produce abundant advanced multifunctional materials. Although numerous achievements have been made in this field, there is still no review to summarize the relevant research. This review summarizes the state-of-the-art achievements made in PDMS-based fluorescent materials (PFMs). First, the preparation of PFM is overviewed following a classification according to the fluorescent sources, including organic fluorescent molecules, perovskite, photoluminescent nanomaterials, and metal complexes. Their applications in sensors, fluorescent probes, multifunctional coatings, and anticounterfeiting are then introduced. Finally, the challenges and development trends in the field of PFMs are presented.

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“…[6][7][8][9] In the past decade, intensive effects have been made to protect perovskites, such as surface barrier layer and encapsulation, which isolate perovskites from the outside environments. [10][11] For instance, Hou et al [12] have recently proposed a liquid-phase sintering procedure to stabilize CsPbX 3 (X = Cl, Br, or I) within a zeolitic imidazolate framework (ZIF) glass, and achieved bright photo-luminance emission and over 10 000 h stability soaking in water. Furthermore, similar protecting strategies, by using silicon oxide, [13] metal-organic framework [14] and zeolite, [15] have also been successfully applied in stabilizing perovskites.…”

Section: Introductionmentioning

confidence: 99%

Cold Pressing of Perovskite‐ZIF Glass Interpenetrating Networks with Stable Photoelectric Response

Xia,

Sun,

Wei

et al. 2024

Chemistry A European J

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The protection of lead halide perovskite within a stable matrix normally leads to the loss of semiconducting properties. Here, we report the synthesis of perovskite‐ZIF glass interpenetrating networks via a cold pressing method, which allows the advantages of bright photoluminescence, high photoconductivity and environmental stability. This hybrid architecture has provided a novel design strategy for the real‐world application of perovskite‐based devices.

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Stability of CsPbX3 (X=Br, Cl, I) perovskite nanocrystalline

Cited by 10 publications

References 81 publications

Enhancing Photoluminescence and Stability of CsPbI3 Perovskite Quantum Dots via Cysteine Post-Processing

Enhancing Photoluminescence and Stability of CsPbI3 Perovskite Quantum Dots via Cysteine Post-Processing

Preparation and Applications of Polydimethylsiloxane‐Based Fluorescent Materials

Cold Pressing of Perovskite‐ZIF Glass Interpenetrating Networks with Stable Photoelectric Response

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