Employing Heavy Metal-Free Colloidal Quantum Dots in Solution-Processed White Light-Emitting Diodes

Zhang, Yu; Xie, Chen; Su, Huaipeng; Liu, Jie; Pickering, Shawn; Wang, Yongqiang; Yu, William W.; Wang, Jingkang; Wang, Yiding; Hahm, Jong‐in; Dellas, N. S.; Mohney, Suzanne E.; Xu, Jian

doi:10.1021/nl1021442

Cited by 199 publications

(145 citation statements)

References 15 publications

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“…2o, p). [71][72][73][74] A critical drawback of I-III-VI QDs is their broad emission spectra (FWHM:~100 nm), which removes the major advantage of QDs (i.e., high color purity due to narrow spectra) in display applications. 75 …”

Section: Materials Design For Efficient Qledsmentioning

confidence: 99%

Flexible quantum dot light-emitting diodes for next-generation displays

et al. 2018

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In the future electronics, all device components will be connected wirelessly to displays that serve as information input and/or output ports. There is a growing demand of flexible and wearable displays, therefore, for information input/output of the nextgeneration consumer electronics. Among many kinds of light-emitting devices for these next-generation displays, quantum dot light-emitting diodes (QLEDs) exhibit unique advantages, such as wide color gamut, high color purity, high brightness with low turn-on voltage, and ultrathin form factor. Here, we review the recent progress on flexible QLEDs for the next-generation displays. First, the recent technological advances in device structure engineering, quantum-dot synthesis, and high-resolution full-color patterning are summarized. Then, the various device applications based on cutting-edge quantum dot technologies are described, including flexible white QLEDs, wearable QLEDs, and flexible transparent QLEDs. Finally, we showcase the integration of flexible QLEDs with wearable sensors, micro-controllers, and wireless communication units for the next-generation wearable electronics.

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Section: Materials Design For Efficient Qledsmentioning

confidence: 99%

Flexible quantum dot light-emitting diodes for next-generation displays

et al. 2018

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“…7−12 Various synthetic methods to emissive CuInS 2 NCs have been reported and are summarized in Table S1 in the Supporting Information. 7,13−25 These methods required reaction temperatures as high as 200−240°C, and the resulting CuInS 2 NCs typically exhibit emission quantum yields (QYs) ≤ 10%. Thus, there is a significant demand for the development of lower temperature synthesis of brighter CuInS 2 NCs.…”

Section: Introductionmentioning

confidence: 99%

“…Extensive optimization of experimental parameters such as various Cu (I), Cu (II), and In (III) source compounds, Cu-toIn-to-SDPP feed molar ratios, SDPP concentrations, and alternative solvents/ligands (including ODE, oleic acid (OA), and oleylamine (OLA)) suggested an optimal approach in DDT with the feed molar ratio of 1CuI-to-1In(OAc) 3 -to-4SDPP, as shown by eq 1. The resulting CuInS 2 NCs dispersed in toluene exhibited QY as high as 23%. Structural and compositional characterizations by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and energy-dispersive X-ray spectroscopy (EDX) were performed.…”

Section: Introductionmentioning

confidence: 99%

“…Structural and compositional characterizations by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and energy-dispersive X-ray spectroscopy (EDX) were performed. The resulting CuInS 2 NCs are gradiently-alloyed with Cu locating more on the inner part and In more on the outer layer. Both in situ highresolution 31 P NMR with 1 H decoupling and in situ absorption measurements testify that the reactivity of CuI/DDT toward SDPP in DDT is lower than that of In(OAc) 3 /DDT.…”

Section: Introductionmentioning

confidence: 99%

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Low-Temperature Approach to Highly Emissive Copper Indium Sulfide Colloidal Nanocrystals and Their Bioimaging Applications

Ouyang

et al. 2013

ACS Appl. Mater. Interfaces

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/npsi/ctrl?action=rtdoc&an=21270647&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=21270647&lang=fr READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions?Contact the NRC Publications Archive team at PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1021/am302951k ACS Applied Materials and Interfaces, 5, 8, pp. 2870-2880, 2013 ABSTRACT: We report our newly developed low-temperature synthesis of colloidal photoluminescent (PL) CuInS 2 nanocrystals (NCs) and their in vitro and in vivo imaging applications. With diphenylphosphine sulphide (SDPP) as a S precursor made from elemental S and diphenylphosphine, this is a noninjection based approach in 1-dodecanethiol (DDT) with excellent synthetic reproducibility and large-scale capability. For a typical synthesis with copper iodide (CuI) as a Cu source and indium acetate (In(OAc) 3 ) as an In source, the growth temperature was as low as 160°C and the feed molar ratios were 1Cu-to-1In-to-4S. Amazingly, the resulting CuInS 2 NCs in toluene exhibit quantum yield (QY) of ∼23% with photoemission peaking at ∼760 nm and full width at half maximum (FWHM) of ∼140 nm. With a mean size of ∼3.4 nm (measured from the vertices to the bases of the pyramids), they are pyramidal in shape with a crystal structure of tetragonal chalcopyrite. In situ 31 P NMR (monitored from 30°C to 100°C) and in situ absorption at 80°C suggested that the Cu precursor should be less reactive toward SDPP than the In precursor. For our in vitro and in vivo imaging applications, CuInS 2 /ZnS core−shell QDs were synthesized; afterwards, dihydrolipoic acid (DHLA) or 11-mercaptoundecanoic acid (MUA) were used for ligand exchange and then bio-conjugation was performed. Two single-domain antibodies (sdAbs) were used. One was 2A3 for in vitro imaging of BxPC3 pancreatic cancer cells. The other was EG2 for in vivo imaging of a Glioblastoma U87MG brain tumour model. The bioimaging data illustrate that the CuInS 2 NCs from our SDPP-based low-temperature noninjection appr...

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“…从 20 世纪 80 年代被发现以来 [1] , 由于其优异的光致发光性能和独特的带隙可调性而备受科研界和工业界的关注, 目前量子点已被广泛应用于显示 [2] 、照明 [3] 和生物荧光标记 [4,5] 等领域. 近年广泛的研究, 其合成技术已较为成熟.…”

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Synthesis of InPZnS/ZnS Quantum Dots by Continuous Injection of Phosphorus Precursor

Huang¹,

Li²,

Huang³

et al. 2017

Acta Chim. Sinica

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InP quantum dots (QDs) are regarded as the most desirable candidate to replace the role of CdSe QDs in the applications of bio-labeling, LEDs, solar cells, etc, because InP is more environmentally friendly compared to Cd based QDs, and could also offer a tunable emission from blue to near-infrared. Nevertheless, the studies and applications of InP QDs are rather sparse in comparison with CdSe QDs, which are principally caused by significant difficulties in its synthesis. In this report, we developed a novel method for the synthesis of InPZnS/ZnS QDs by using zinc phosphide as phosphorus precursor, and the zinc and sulfur precursors were also added at the start of reaction, which allows the continuous injection of phosphine gas into the reaction, resulting in high quality InPZnS/ZnS quantum dots with emission up to 680 nm. The core synthesis and shell coating were separated by controlling the reaction temperature. During the first 30 minutes, the temperature of reaction solution was kept at 250 ℃ to grow the InPZnS core QDs. Then, the coating of ZnS shell was happened and kept about 1 hour to guarantee the complete decomposition of 1-dodecanethiol (DDT) after the reaction temperature was increased to 300 ℃. The biggest advantage of this synthetic method is the tunable emission region from blue to near-infrared. The effects of reaction parameters were systematically investigated. We observed that the molar ratio of In: myristic acid (MA) and that of In: Zn (S) had significant influences on the size of the InP QDs. The structure of InPZnS/ZnS QDs was confirmed by transmission electron microscope (TEM), X-ray powder diffraction (XRD), and energy dispersive X-ray analyzer (EDX). TEM characterization indicated the final core/shell InPZnS/ZnS QDs were good monodispersity with an average size of 7 nm. Furthermore, we investigated the versatility of this method by using other phosphorus precursor. The injection pump leaded to a continuous supply of phosphorus precursor on a timescale and reacted with indium precursor to form InP QDs . The final sample showed an emission at 710 nm. The present method gives access to larger sized InP QDs, making it prosperous for applications in biological labeling.

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Employing Heavy Metal-Free Colloidal Quantum Dots in Solution-Processed White Light-Emitting Diodes

Cited by 199 publications

References 15 publications

Flexible quantum dot light-emitting diodes for next-generation displays

Flexible quantum dot light-emitting diodes for next-generation displays

Low-Temperature Approach to Highly Emissive Copper Indium Sulfide Colloidal Nanocrystals and Their Bioimaging Applications

Synthesis of InPZnS/ZnS Quantum Dots by Continuous Injection of Phosphorus Precursor

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