A Review on Multiple I-III-VI Quantum Dots: Preparation and Enhanced Luminescence Properties

Chen, Ting; Chen, Yuanhong; Li, Youpeng; Liang, Mengbiao; Wu, Weihao; Wang, Yude

doi:10.3390/ma16145039

Cited by 12 publications

(2 citation statements)

References 183 publications

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“…AIS QDs co-doped with both Mn 2+ and Zn 2+ are also possible where these doped QDs show ferromagnetic and paramagnetic properties, in addition to long PL lifetimes (41). Several efforts have been made already for using a wide band gap inorganic shell like ZnS (~3.7 eV) with a low lattice mismatch of 2.2% with the I-III-VI QDs.…”

Section: Resultsmentioning

confidence: 99%

12‐1: Invited Paper: Narrowing the Emission Linewidth of I‐III‐VI Quantum Dots

Dey,

Kelehan,

Cichocki

et al. 2024

Symp Digest of Tech Papers

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In recent years, I‐III‐VI semiconductor quantum dots (QDs) have shown significant improvements that have unlocked new capabilities and end markets. Some typical examples of I‐III‐VI QDs are CuAlS2 (blue), AgInS2 (green), CuInSe2 (red) CuInSe2 (near‐IR), but other compositions and alloys are possible. These materials exhibit tunable photoluminescence (PL) emissions, and can achieve near unity PL quantum yield. They can have efficient broad emission, but also can have narrow emission, large Stokes shifts, and high optical extinction coefficients. These materials are often more stable, safer, and lower cost than alternatives such as CdSe, InP, and PbS or PbSe QDs. In this work, we discuss industrialization and scale‐up of I‐III‐VI QDs, starting with critical end uses related to spectrum optimization for greenhouses and solar energy. We also update on recent progress narrowing the emission linewidth (full‐width at half maximum) of I‐III‐VI QDs to the point that they are becoming competitive with legacy QDs used in displays and lighting.

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Section: Resultsmentioning

confidence: 99%

12‐1: Invited Paper: Narrowing the Emission Linewidth of I‐III‐VI Quantum Dots

Dey,

Kelehan,

Cichocki

et al. 2024

Symp Digest of Tech Papers

View full text Add to dashboard Cite

show abstract

“…Compared with traditional fluorescent dyes (1–10 ns), they have a narrow and symmetry emission spectrum, thus having longer excited state lifetimes (20–50 ns). 45 Their quantum yield is 40% to 90% and has a high extinction coefficient. They are more stable than the traditional organic dyes.…”

Section: In Vivo Imagingmentioning

confidence: 99%

A Review of in vivo Toxicity of Quantum Dots in Animal Models

Lin,

Chen

2023

IJN

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Tremendous research efforts have been devoted to nanoparticles for applications in optoelectronics and biomedicine. Over the past decade, quantum dots (QDs) have become one of the fastest growing areas of research in nanotechnology because of outstanding photophysical properties, including narrow and symmetrical emission spectrum, broad fluorescence excitation spectrum, the tenability of the emission wavelength with the particle size and composition, anti-photobleaching ability and stable fluorescence. These characteristics are suitable for optical imaging, drug delivery and other biomedical applications. Research on QDs toxicology has demonstrated QDs affect or damage the biological system to some extent, and this situation is generally caused by the metal ions and some special properties in QDs, which hinders the further application of QDs in the biomedical field. The toxicological mechanism mainly stems from the release of heavy metal ions and generation of reactive oxygen species (ROS). At the same time, the contact reaction with QDs also cause disorders in organelles and changes in gene expression profiles. In this review, we try to present an overview of the toxicity and related toxicity mechanisms of QDs in different target organs. It is believed that the evaluation of toxicity and the synthesis of environmentally friendly QDs are the primary issues to be addressed for future widespread applications. However, considering the many different types and potential modifications, this review on the potential toxicity of QDs is still not clearly elucidated, and further research is needed on this meaningful topic.

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Analysis of the Minute Differences between the Internal Structures of Green‐Emitting Quantum Dots Via Synchrotron‐Based X‐Ray Photoelectron Spectroscopy

Yun,

Won,

Sung

et al. 2024

Energy & Environ Materials

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The development of an analytical method for determining the properties of quantum dots (QDs) is crucial for improving the optical performance of QD‐based displays. Therefore, synchrotron‐based X‐ray photoelectron spectroscopy (XPS) is designed here to accurately characterize the chemical and structural differences between different QDs. This method enables the determination of the reason for the minimal differences between the optical properties of different QDs depending on the synthesis process, which is difficult to determine using conventional methods alone. Combined with model simulations, the XPS spectra obtained at different photon energies reveal the internal structures and chemical‐state distributions of the QDs. In particular, the QD synthesized under optimal conditions demonstrates a relatively lower degree of oxidation of the core and more uniformly stacked ZnSe/ZnS shell layers. The internal structures and chemical‐state distributions of QDs are closely related to their optical properties. Finally, the synchrotron‐based XPS proposed here can be applied to compare nearly equivalent QDs with slightly different optical properties.

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A Review on Multiple I-III-VI Quantum Dots: Preparation and Enhanced Luminescence Properties

Cited by 12 publications

References 183 publications

12‐1: Invited Paper: Narrowing the Emission Linewidth of I‐III‐VI Quantum Dots

12‐1: Invited Paper: Narrowing the Emission Linewidth of I‐III‐VI Quantum Dots

A Review of in vivo Toxicity of Quantum Dots in Animal Models

Analysis of the Minute Differences between the Internal Structures of Green‐Emitting Quantum Dots Via Synchrotron‐Based X‐Ray Photoelectron Spectroscopy

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