Novel red-emitting CsPb1−Ti I3 perovskite QDs@glasses with ambient stability for high efficiency white LEDs and plant growth LEDs

Zhang, Zelong; Shen, Linli; Zhang, Huiling; Ding, Ling; Shao, Guangzhan; Liang, Xiaojuan; Xiang, Weidong

doi:10.1016/j.cej.2019.122125

Cited by 75 publications

(38 citation statements)

References 39 publications

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“…The lattice spacing located between CsPbBr 3 and CsPbI 3 , which were broader than that of the former and narrower than that of the latter, ascribing to the fact that the lattice fringes were expanded because of the introduction of I, which is in accordance with Bragg's equation. [36] The EDS elemental mappings, as illustrated in Figure 2g-j, verified that elements Br, I, Cs, and Pb in the glass matrix were distributed uniformly. It is assumed that the red emitter NCs grew well and evenly in the glass matrix.…”

Section: Optical Properties and Microstructure Analysis Of Cspb(br/i)mentioning

confidence: 68%

“…In further experiments, the stability of as-made CsPb(Br/I) 3 NCs glasses against the water and thermal was systematically studied. [35,36] Photographs of CPA, CPB, and CPC immersed in water under daylight and UV light of 365 nm are shown in Figure 4d-f. About 91% original PL intensity of the sample CPC was held after 60 d of immersion in water, while the CPA just maintained about 85%.…”

Section: Stability Of Cspb(br/i) 3 Ncs Glassesmentioning

confidence: 99%

“…The LE of the device could reach 113.0 lm W −1 , which was higher than the reported wLED device based on PQDs glasses. [36] Other indicators such as the corresponding CIE color coordinates of (0.3443, 0.3670), correlated color temperature (CCT) of 5075 K, and color rendering index (CRI) of 73.9 could be received. Here, a series of wLEDs with tunable CRI were fabricated, and the corresponding LE, CRI, and CCT are listed in Table 3.…”

Section: Application Of Cspb(br/i) 3 Ncs Glasses In Led and 3d Printingmentioning

confidence: 99%

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Composition Optimization of Multifunctional CsPb(Br/I)₃ Perovskite Nanocrystals Glasses with High Photoluminescence Quantum Yield

Wang

Jin

Chen

et al. 2021

Advanced Optical Materials

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manifested prominent optical performance, such as extreme narrow full width at half maximum (FWHM), high PLQY (up to 90%), tunable emissive color covering a visible full-spectral range, and high defect tolerance over the past decade, rendering them high value for applications in LED. [5][6][7][8][9][10][11] But on the other hand, the intrinsic instability of perovskite quantum dots (PQDs) poses a threat to further development against the water and thermal. [12] Apart from these, the defects of anion exchange are still an urgent problem which impedes many practical applications. [13] Therefore, lots of researchers have adopted various methods to improve the stability of perovskite quantum dots such as embedding QDs in a polymeric matrix like polystyrene, the inorganic matrices like zeolites, poly(methyl methacrylate) (PMMA), or mesoporous silica. [5,[14][15][16] Fortunately, embedding CsPbX 3 PQDs into inorganic oxide glasses through in situ nucleation/growth has been verified to be a feasible alternative to promote stability and effectively protect robust glass matrix mechanisms. [17][18][19] However, the PLQY value of the CsPbX 3 NCs glasses is still low compared to that of the corresponding colloidal PQDs counterparts, especially for CsPb(Br/I) 3 and CsPbI 3 . [20] In addition, the external quantum efficiency of perovskite NCs based LED is closely related to the PLQY, [21] so obtaining a high PLQY of CsPbX 3 NCs glasses has become another chase. The highest PLQY of 81% reported was for CsPbBr 3 NCs glasses, which was realized in boron-germanium glass. The PLQY value of CsPb(Br/I) 3 PQDs embedded in glasses is merely 20%, and the value for CsPbI 3 and CsPbCl 3 PQDs in glass has not been reported nevertheless. [22] Red-emitting pure CsPbI 3 PQDs glasses were prepared by Xiang's group in 2017, but its PLQY was of only 4.2% owing to the existence of structural defect and electron-hole in CsPbI 3 NCs glass. [23] Song and co-workers raised a one-pot preparation method to fabricate CsPb(Br/I) 3 @anthracene-based white LED (wLED) composites. The as-fabricated white lightemitting composite exhibited a PLQY of 41.9%. [24] A versatile devitrification of CsPb(Br/I) 3 NCs was reported in boro-germanate glasses matrix with a PLQY of 20-25%. [22] Fluoride additives were introduced into an oxyhalide borosilicate glass matrix for breaking the tight glass network structure, which promoted the nucleation of CsPb(Br/I) 3 NCs inside the glass. The PLQY of CsPb(Br/I) 3 NCs glasses reached 50-60%, which was the highest Currently, high optical purity, perfect stability, and high photoluminescence quantum yield (PLQY) are very important, being the key to obtain highquality luminescent materials. The research of perovskite nanocrystals (NCs) as optical materials is in full swing. Nevertheless, the low PLQY value, especially for the red-emitting perovskite NCs, is a main obstacle to applications in display. This work reports the optimized components to synthesize CsPb(Br/I) 3 NCs glasses whose PLQY achieves a big boost from 15.4% to ≈60%...

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Section: Optical Properties and Microstructure Analysis Of Cspb(br/i)mentioning

confidence: 68%

Section: Stability Of Cspb(br/i) 3 Ncs Glassesmentioning

confidence: 99%

Section: Application Of Cspb(br/i) 3 Ncs Glasses In Led and 3d Printingmentioning

confidence: 99%

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Composition Optimization of Multifunctional CsPb(Br/I)₃ Perovskite Nanocrystals Glasses with High Photoluminescence Quantum Yield

Wang

Jin

Chen

et al. 2021

Advanced Optical Materials

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“…The exact structure of PQDs was exploited by K. Wang to develop a solution-phase exchange ligand and achieve the best champion device results 182. Similarly, other divalent cations like Zn and Ti has been doped in the CsPbI 3 QDs structure for the purpose to improve its phase stability and resistivity against thermal and moisture156,183 . In this regards, L. Zhanget al developed a Zn-doped CsPbI 3 QD via a ZnI 2 additive which provided Zn +2 and extra I -, Zn doping enhanced the formation energy and the Goldschmidt tolerance factor, leading to high thermodynamic 36 stability while the Ireduced vacancies during synthesis.…”

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confidence: 99%

CsPbI₃ perovskite quantum dot solar cells: opportunities, progress and challenges

2022

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“…Among these strategies, specific wavelength lighting via the use of blue/red light-emitting diode (LED) enhances photosynthetic efficiency by overlapping chlorophyll absorption. [4] Phosphors with broad excitation wavelengths and emission regions are widely used in various fields. Phosphorconverted LEDs (pc-LEDs) can be customized according to different purposes by adding different emission phosphors.…”

mentioning

confidence: 99%

Near‐Infrared Nanophosphor Embedded in Mesoporous Silica Nanoparticle with High Light‐Harvesting Efficiency for Dual Photosystem Enhancement

Huang

Chan

et al. 2021

Angewandte Chemie

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Light‐harvesting and conversion ability is important to promote plant growth, and especially when resources are limited. A near‐infrared (NIR) nanophosphor embedded with mesoporous silica nanoparticles (MSN), ZnGa2O4:Cr3+,Sn4+ (ZGOCS), was developed and its optical properties were harnessed to enhance the photosynthetic ability of Brassica rapa spp. chinensis. The broad excitation of ZGOCS from the ultraviolet to the visible region allowed the conversion of extra light into near‐infrared light (650–800 nm) and thus promoted the dual photosystem via the Emerson effect. ZGOCS@MSN was spherical with a size of 65±10 nm and good dispersion. A light conversion ability of up to 75 % under different wavelengths was achieved. Moreover, the electron transfer rate of photosynthesis increased by 100 % with a suitable ZGOCS@MSN concentration. Plant and animal models were used to explore the effects of the nanophosphor. ZGOCS@MSN distribution was tracked by monitoring its NIR emission in plant and animal tissues, demonstrating that this nanophosphor can be potentially utilized in plant growth.

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Novel red-emitting CsPb1−Ti I3 perovskite QDs@glasses with ambient stability for high efficiency white LEDs and plant growth LEDs

Cited by 75 publications

References 39 publications

Composition Optimization of Multifunctional CsPb(Br/I)₃ Perovskite Nanocrystals Glasses with High Photoluminescence Quantum Yield

Composition Optimization of Multifunctional CsPb(Br/I)₃ Perovskite Nanocrystals Glasses with High Photoluminescence Quantum Yield

CsPbI₃ perovskite quantum dot solar cells: opportunities, progress and challenges

Near‐Infrared Nanophosphor Embedded in Mesoporous Silica Nanoparticle with High Light‐Harvesting Efficiency for Dual Photosystem Enhancement

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Novel red-emitting CsPb1−Ti I3 perovskite QDs@glasses with ambient stability for high efficiency white LEDs and plant growth LEDs

Cited by 75 publications

References 39 publications

Composition Optimization of Multifunctional CsPb(Br/I)3 Perovskite Nanocrystals Glasses with High Photoluminescence Quantum Yield

Composition Optimization of Multifunctional CsPb(Br/I)3 Perovskite Nanocrystals Glasses with High Photoluminescence Quantum Yield

CsPbI3 perovskite quantum dot solar cells: opportunities, progress and challenges

Near‐Infrared Nanophosphor Embedded in Mesoporous Silica Nanoparticle with High Light‐Harvesting Efficiency for Dual Photosystem Enhancement

Contact Info

Product

Resources

About

Composition Optimization of Multifunctional CsPb(Br/I)₃ Perovskite Nanocrystals Glasses with High Photoluminescence Quantum Yield

Composition Optimization of Multifunctional CsPb(Br/I)₃ Perovskite Nanocrystals Glasses with High Photoluminescence Quantum Yield

CsPbI₃ perovskite quantum dot solar cells: opportunities, progress and challenges