Atomically thin heavy-metal-free ZnTe nanoplatelets formed from magic-size nanoclusters

Wang, Fei; Zhang, Minyi; Chen, Wei; Javaid, Shaghraf; Yang, Heng; Wang, Sheng; Yang, Xuyong; Zhang, Lai-Chang; Buntine, Mark A.; Li, Chunsen; Jia, Guohua

doi:10.1039/d0na00409j

Cited by 11 publications

(19 citation statements)

References 37 publications

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“…In conclusion, as a representative candidate of the class of 2D materials, colloidal CdSe NPLs constitute a significant platform for the fundamental research and development of the next generation of optical devices. Knowledge of the spectral tunability and self‐assembly methods of CdSe NPLs could facilitate the research of other novel cadmium‐free solution‐processed 2D materials such as ZnTe, [ 165 ] ZnSe, [ 166 ] HgTe, [ 116 ] and ZnS [ 167 ] NPLs. For example, the emission peak wavelength has been tuned discretely from 345 to 380 nm in the case of ZnSe NPLs by modulating the vertical thickness over the NPL ensemble.…”

Section: Discussionmentioning

confidence: 99%

Manipulation of the Optical Properties of Colloidal 2D CdSe Nanoplatelets

Zhang

Sun

2021

Advanced Photonics Research

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Driven by the unique optoelectronic features arising from the strong quantum confinement along the thickness direction, rapid development of CdSe‐based nanoplatelets (NPL) has accomplished facile bandgap tunability over a broad spectrum via different preparation protocols or various postsynthesis treatments. The anisotropic geometry of NPLs also stimulates the exploitation of self‐assembled CdSe NPL superstructures to enhance light extraction efficiency in display technologies and achieves polarized lasing performance or even electrically pumped laser by adjusting the transition dipole orientation. Although several review articles about the general optical properties of CdSe NPLs have been published, none of them focus on the ability of spectral tunability and precise control of orientations in the solid‐state phase of CdSe NPLs. Herein, the band structure engineering approaches in the CdSe NPL family are systematically summarized and the optical properties and device performance metrics of these deliberately engineered NPLs are compared. Then, the recent advanced studies of the motivation and assembly methods of geometrically anisotropic CdSe NPL superlattices are discussed. Finally, the current challenges and future outlook on the controlled modification of optical features and the influences of the approaches in the aspect of CdSe NPL–based devices’ performance are highlighted.

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Section: Discussionmentioning

confidence: 99%

Manipulation of the Optical Properties of Colloidal 2D CdSe Nanoplatelets

Zhang

Sun

2021

Advanced Photonics Research

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“…In addition to the MSCs that display sharp optical absorption singlets, [3–15, 18–26] there is another type of nanospecies that exhibits sharp optical absorption doublets [16, 17, 27–44] . An example semiconductor is photoluminescent (PL) CdSe peaking at around 373/393 (Species‐393) or 433/460 nm (Species‐460) [16, 27–30] .…”

Section: Introductionmentioning

confidence: 99%

Transformation Pathway from CdSe Magic‐Size Clusters with Absorption Doublets at 373/393 nm to Clusters at 434/460 nm

et al. 2021

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Divergent interpretations have appeared in the literature regarding the structural nature and evolutionary behavior for photoluminescent CdSe nanospecies with sharp doublets in optical absorption. We report ac omprehensive description of the transformation pathway from one CdSe nanospecies displaying an absorption doublet at 373/393 nm to another species with ad oublet at 433/460 nm. These two nanospecies are zero-dimensional (0D) magic-sizec lusters (MSCs) with 3D quantum confinement, and are labeled dMSC-393 and dMSC-460, respectively.S ynchrotron-based small-angle X-rays cattering (SAXS) returns ar adius of gyration of 0.92 nm for dMSC-393 and 1.14 nm for dMSC-460, and indicates that both types are disc shaped with the exponent of the SAXS form factor equal to 2.1. The MSCs develop from their unique counterpart precursor compounds (PCs), whichare labeled PC-393 and PC-460, respectively.For the dMSC-393 to dMSC-460 transformation, the proposed PCenabled pathwayiscomprised of three key steps,dMSC-393 to PC-393 (Step 1), PC-393 to PC-460 (Step 2i nvolving monomer addition), and PC-460 to dMSC-460 (Step 3). The present study provides af ramework for understanding the PC-based evolution of MSCs and howP Cs enable transformations between MSCs.

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“…[23] Such a possibility of wide range of applications led to several experiments for the synthesis of various ZnTe nanostructures such as quantumdots, nanoplates, thin films, nanowires, nanoribbons, and nanotubes. [24][25][26][27][28][29][30][31][32] For example, Zarei et al [33] synthesized ZnTe thin films by glancing angle technique and observed that they were useful in optoelectronic devices. In a study, Das et al [34] synthesized various ZnTe nanoparticles and reported their size-dependent structural, optical, and vibrational properties.…”

Section: Introductionmentioning

confidence: 99%

Atomic‐Ordering‐Induced Modulated Properties of Zigzag ZnTe Nanotubes

Das¹,

Chowdhury

Gupta

2021

Physica Status Solidi (b)

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In this work, zigzag ZnTe nanotubes of various diameters are constructed from a ZnTe sheet and are optimized geometrically through density functional theory based energy minimization calculations. The energetically optimized nanotubes are then used to examine their electronic properties. It is found that the band gap of a nanotube may be adjusted over a wide range from 0.5 to 2.3 eV and the work function of a nanotube may be adjusted in the range from 4.7 to 5.8 eV by choosing a nanotube of appropriate diameter. Thus, zigzag ZnTe nanotube may serve as an important band gap material for technological purposes.

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Atomically thin heavy-metal-free ZnTe nanoplatelets formed from magic-size nanoclusters

Abstract: Atomically thin colloidal quasi-two-dimensional (2D) semiconductor nanoplatelets (NPLs) have attracted tremendous attention due to their excellent properties and stimulating applications.

Cited by 11 publications

References 37 publications

Manipulation of the Optical Properties of Colloidal 2D CdSe Nanoplatelets

Manipulation of the Optical Properties of Colloidal 2D CdSe Nanoplatelets

Transformation Pathway from CdSe Magic‐Size Clusters with Absorption Doublets at 373/393 nm to Clusters at 434/460 nm

Atomic‐Ordering‐Induced Modulated Properties of Zigzag ZnTe Nanotubes

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