Facile synthesis and photoluminescence characterization of AgInZnS hollow nanoparticles

Yang, Zhaoqi; Chen, Weiwei; Zu, Zhiqiang; Zang, Zhigang; Yang, Yuchen; Tang, Xiaosheng

doi:10.1016/j.matlet.2015.03.055

Cited by 11 publications

(4 citation statements)

References 29 publications

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“…It is instructive to compare HR-TEM images of A-1 and A-4 nanocrystals significantly differing in their size, shape, and zinc content (see Figure b,d). The interplanar distances derived from these images were in the range of 0.310–0.339 nm and could be ascribed to (002) interplanar distances of orthorhombic AgInS 2 and hexagonal ZnS, corroborating alloyed-type structure of the studied nanocrystals. ,,, Possible, alternative alloyed-type structures of tetragonal AgInS 2 (JCPDF 00-25-1330) and cubic ZnS (JCPDF 00-50-0566) can be excluded since in this case significantly shorter interplanar distances, in the range 0.1–0.2 nm should have been observed. − Moreover, HR-TEM studies excluded the possibility of the formation of hexagonal InAgZn 2 S 4 -type structures (JCPDF 00-025-0383) since they are characterized by interplanar distances of 0.25–0.29 nm. − TEM images of A-1 and A-4 nanocrystals are shown in Figure c,e. The corresponding images of A-2 and A-3 nanocrystals can be found in the Supporting Information.…”

Section: Resultssupporting

confidence: 55%

Indium(II) Chloride as a Precursor in the Synthesis of Ternary (Ag–In–S) and Quaternary (Ag–In–Zn–S) Nanocrystals

et al. 2022

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A new indium precursor, namely, indium(II) chloride, was tested as a precursor in the synthesis of ternary Ag−In−S and quaternary Ag−In−Zn−S nanocrystals. This new precursor, being in fact a dimer of Cl 2 In−InCl 2 chemical structure, is significantly more reactive than InCl 3 , typically used in the preparation of these types of nanocrystals. This was evidenced by carrying out comparative syntheses under the same reaction conditions using these two indium precursors in combination with the same silver (AgNO 3 ) and zinc (zinc stearate) precursors. In particular, the use of indium(II) chloride in combination with low concentrations of the zinc precursor yielded spherical-shaped (D = 3.7−6.2 nm) Ag−In−Zn−S nanocrystals, whereas for higher concentrations of this precursor, rodlike nanoparticles (L = 9−10 nm) were obtained. In all cases, the resulting nanocrystals were enriched in indium (In/Ag = 1.5−10.3). Enhanced indium precursor conversion and formation of anisotropic, longitudinal nanoparticles were closely related to the presence of thiocarboxylic acid type of ligands in the reaction mixture. These ligands were generated in situ and subsequently bound to surfacial In(III) cations in the growing nanocrystals. The use of the new precursor of enhanced reactivity facilitated precise tuning of the photoluminescence color of the resulting nanocrystals in the spectral range from ca. 730 to 530 nm with photoluminescence quantum yield (PLQY) varying from 20 to 40%. The fabricated Ag−In−S and Ag−In−Zn−S nanocrystals exhibited the longest, reported to date, photoluminescence lifetimes of ∼9.4 and ∼1.4 μs, respectively. It was also demonstrated for the first time that ternary (Ag−In− S) and quaternary (Ag−In−Zn−S) nanocrystals could be applied as efficient photocatalysts, active under visible light (green) illumination, in the reaction of aldehydes reduction to alcohols.

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Section: Resultssupporting

confidence: 55%

Indium(II) Chloride as a Precursor in the Synthesis of Ternary (Ag–In–S) and Quaternary (Ag–In–Zn–S) Nanocrystals

et al. 2022

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“…Figure S5(c) describes the absorption of the AgInZnS QDs. Figure S5(d) shows the red PL emission of AgInZnS QDs with centered emission peak at 610 nm, which agrees well with the previous published work 57 . XPS is further applied to characterize As shown in Table 1, the characteristics of the fabricated WLEDs have been recorded, including CRI, CCT and CIE coordinates.…”

Section: Resultssupporting

confidence: 91%

“…Particularly, the perovskite phases of red CsPbI 3 QDs have been demonstrated to be metastable under ambient conditions and they easily undergo a phase transition resulting in diminishing their optical properties 54−56 . Consequently, for obtaining the high performance warm WLEDs, the redemission AgInZnS QDs with a wide FWHM of 90 nm is suitable and chosen to act as the red component for the warm light emission 57,58 .…”

Section: Introductionmentioning

confidence: 99%

Highly efficient emission and high-CRI warm white light-emitting diodes from ligand-modified CsPbBr<sub>3</sub> quantum dots

Yan¹,

Zhao²,

Zhang³

et al. 2022

OEA

Self Cite

107

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All-inorganic CsPbBr 3 perovskite quantum dots (QDs) have received great attention in white light emission because of their outstanding properties. However, their practical application is hindered by poor stability. Herein, we propose a simple strategy to synthesize excellent stability and efficient emission of CsPbBr 3 QDs by using 2-hexyldecanoic acid (DA) as a ligand to replace the regular oleic acid (OA) ligand. Thanks to the strong binding energy between DA ligand and QDs, the modified QDs not only show a high photoluminescence quantum yield (PLQY) of 96% but also exhibit high stability against ethanol and water. Thereby warm white light-emitting diodes (WLEDs) are constructed by combining ligand modified CsPbBr 3 QDs with red AgInZnS QDs on blue emitting InGaN chips, exhibiting a color rendering index of 93, a power efficiency of 64.8 lm/W, a CIE coordinate of (0.44, 0.42) and correlated color temperature value of 3018 K. In addition, WLEDs based on ligand modified CsPbBr 3 QDs also exhibit better thermal performance than that of WLEDs based on the regular CsPbBr 3 QDs. The combination of improved efficiency and better thermal stability with high color quality indicates that the modified CsPbBr 3 QDs are ideal for WLEDs application.

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“…Particularly, the perovskite phases of red CsPbI 3 QDs have been demonstrated to be metastable under ambient conditions and they easily undergo a phase transition resulting in diminishing their optical properties [54][55][56] . Consequently, for obtaining the high performance warm WLEDs, the red-emission AgInZnS QDs with a wide FWHM of 90 nm is suitable and chosen to act as the red component for the warm light emission 57,58 .…”

Section: J U S T a C C E P T E Dmentioning

confidence: 99%

Highly efficient emission and high-CRI warm white light-emitting diodes from ligand-modified CsPbBr<sub>3</sub> quantum dots

Yan¹,

Zhao²,

Zhang³

et al. 2021

OEA

Self Cite

View full text Add to dashboard Cite

Facile synthesis and photoluminescence characterization of AgInZnS hollow nanoparticles

Cited by 11 publications

References 29 publications

Indium(II) Chloride as a Precursor in the Synthesis of Ternary (Ag–In–S) and Quaternary (Ag–In–Zn–S) Nanocrystals

Indium(II) Chloride as a Precursor in the Synthesis of Ternary (Ag–In–S) and Quaternary (Ag–In–Zn–S) Nanocrystals

Highly efficient emission and high-CRI warm white light-emitting diodes from ligand-modified CsPbBr<sub>3</sub> quantum dots

Highly efficient emission and high-CRI warm white light-emitting diodes from ligand-modified CsPbBr<sub>3</sub> quantum dots

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