Sodium Chloride Protected CdHgTe Quantum Dot Based Solid-State Near-Infrared Luminophore for Light-Emitting Devices and Luminescence Thermometry

Kalytchuk, Sergii; Adam, Marcus; Tomanec, Ondřej; Zbořil, Radek; Gaponik, Nikolai; Rogach, Andrey L.

doi:10.1021/acsphotonics.7b00222

Cited by 23 publications

(15 citation statements)

References 43 publications

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“…Among the numerous temperature‐determining schemes developed so far, more and more research interest has been captured by the luminescence‐based sensing methods, due to their noninvasiveness, fast response, high spatial resolution, capability of real‐time/on‐line and in‐situ monitoring, capacity to resist strong electro/magnetic fields, and ability to work with high‐speed moving objects . A large variety of luminescent thermometers including metal salts, oxides and complexes, metal–organic frameworks, nanoclusters/nanocrystals, quantum dots (QDs), organometallics, organic dyes, and polymers, have already been developed. However, a large portion of the existing luminescent thermometry protocols are dependent on the emission intensity decreasing with the temperature increase as a result of the thermal activation of the nonradiative decay pathways.…”

Section: Introductionmentioning

confidence: 99%

“…However, a large portion of the existing luminescent thermometry protocols are dependent on the emission intensity decreasing with the temperature increase as a result of the thermal activation of the nonradiative decay pathways. [12,14a,15,17,20a,21] Regretfully, thermometers developed on the basis of single‐emission change are prone to suffering from errors caused by the probe concentration, the excitation, or detection efficiency. In contrast with single‐emission‐based luminescent thermometers, the ratiometric luminescent ones with change in the intensity ratio of two emission bands when interacting with analytes are more favorable .…”

Section: Introductionmentioning

confidence: 99%

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Dual‐Emitting Dihydrophenazines for Highly Sensitive and Ratiometric Thermometry over a Wide Temperature Range

Shi

Song

Lian

et al. 2018

Advanced Optical Materials

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fields, and ability to work with high-speed moving objects. [6][7][8][9] A large variety of luminescent thermometers including metal salts, oxides and complexes, [10,11] metalorganic frameworks, [12,13] nanoclusters/ nanocrystals, [14] quantum dots (QDs), [15] organometallics, [16] organic dyes, [17][18][19] and polymers, [20] have already been developed. However, a large portion of the existing luminescent thermometry protocols are dependent on the emission intensity decreasing with the temperature increase as a result of the thermal activation of the nonradiative decay pathways. [12,14a,15,17,20a,21] Regretfully, thermometers developed on the basis of single-emission change are prone to suffering from errors caused by the probe concentration, the excitation, or detection efficiency. In contrast with single-emission-based luminescent thermometers, the ratiometric luminescent ones with change in the intensity ratio of two emission bands when interacting with analytes are more favorable. [6][7][8][9] It is because that ratiometric probing mode can eliminate the intensity fluctuations exerted by the quantity of luminophore, excitation power, detection efficiency, and the sample morphology, displaying a self-calibrating readout. [6-11b,13,18,19] It is therefore highly demanded to devise ratiometric temperaturesensing schemes.There are generally two common approaches for ratiometric sensing, one is referencing the signal of an indicator to that of a temperature-insensitive dye, and the other is taking advantage of probes with intrinsic dual emissions. In the former scenario, careful calibration and complicated preparation process are often required, due to the different physicochemical features between two or more luminogens. From a practical point of view, the latter strategy is even more attractive. In addition, although a few high-performance ratiometric luminescent thermometers have been reported, there still leaves a considerable large room for development: For example, 1) the ratiometric thermometers often involve lanthanides which are rare-earth elements and not readily available, and moreover the lanthanide coordination polymers are unstable in polar solvents, leading to the sensitizers replaced by the solvents; [8-11a,13a,b,c,18d] 2) the luminescence of metal-ligand complexes is usually quenchable by oxygen; [8,11c] 3) the already-developed ratiometric Achieving ratiometric thermometry with a single organic luminophore is a tempting but challenging task. Herein, three dihydrophenazine-based ratiometric thermometers, namely DPC, DPSi-1, and DPSi-2, are facilely developed via the novel vibration-induced emission (VIE) strategy. By elaborately introducing alkyl/siloxane chains to the dihydrophenazine core, these fluorophores exhibit as powder with low melting point or nonvolatile liquids, which emit temperature-sensitive dual emissions: predominantly blue fluorescence (FL) at low temperature and chiefly orange-red FL at high temperature. According to the VIE mechanism, high temperature activates the int...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual‐Emitting Dihydrophenazines for Highly Sensitive and Ratiometric Thermometry over a Wide Temperature Range

Shi

Song

Lian

et al. 2018

Advanced Optical Materials

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“…The NIR emission centered at λ =1300 nm is the optimal wavelength for in vivo imaging with the deepest tissue penetration due to the lowest photon absorption and tissue scattering, as proved by recent studies . Although PbSe, PbS, and CdHgTe QDs have been reported, the potential toxicity of the heavy‐metal elements limits their application for in vivo imaging. The synthesis of Ag 2 Se QDs, for which the emission centered in NIR range is much less than that of other QDs, such as CdTe and CdSe QDs.…”

Section: Quantum Dots (Qds)mentioning

confidence: 99%

Recent Progress in Fluorescence Imaging of the Near‐Infrared II Window

Miao

Zhu

et al. 2018

ChemBioChem

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Near‐infrared (NIR) fluorescent materials are considered to be the most promising labeling reagents for sensitive determination and biological imaging due to the advantages of lower background noise, deeper penetrating capacity, and less destructive effects on the biomatrix over those of UV and visible fluorophores. In the past decade, advances in biomedical fluorescence imaging in the NIR region have focused on the traditional NIR window (NIR‐I; λ=700–900 nm), and have recently been extended to the second NIR window (NIR‐II; λ=1000–1700 nm). In vivo NIR‐II fluorescence imaging outperforms imaging in the NIR‐I window as a result of further reduced absorption, tissue autofluorescence, and scattering. In this review, the applications of four types of NIR‐II fluorescent materials, organic fluorophores, quantum dots, rare‐earth compounds, and single‐walled carbon nanotubes, are summarized and future trends are discussed. Some methods to enhance the NIR‐II fluorescence quantum yield are also proposed.

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“…Semiconductor nanocrystals, namely quantum dots (QDs) have created many innovative advances in the areas of lighting, displays, energy conversion devices, bioimaging, and biosensors . In particular, Cd‐based QDs have found a wide range of commercial applications . However, of particular relevance for in vivo applications, the development of traditional Cd‐based QDs in bioanalysis and bioimaging has been hampered by the toxicity of cadmium ions .…”

Section: Optical Properties Of Cdzns/zns Cdznses/zns and Cdse/cds/zmentioning

confidence: 99%

Highly Luminescent Quantum Dots in Remote‐Type Liquid‐Phase Color Converters for White Light‐Emitting Diodes

Choi

Han

et al. 2018

Adv Materials Technologies

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QDs. [14][15][16][17] However, they have less than optimal optical properties due to nonradiative recombination by defects. [12,18] As a result, despite the safety issues, Cdbased QDs are still attracting much attention and are seen as promising candidate materials for versatile applications in nonbiological environments owing to their outstanding performance with respect to tunable luminescence across the ultraviolet-visible-near-infrared (UV-vis-NIR) region, broad absorption bands with narrow emission bands, high quantum yields, [19] chemical stability, and photostability. [20,21] It is important to note that QDs have been passivated with higher bandgap semiconductor layers, such as ZnS and CdS, to increase the quantum yield. In the core-shell type QDs, the shell provides physical and chemical stabilities, as well as photostability to the core QDs, which is important for minimizing cytotoxicity, and also offers platforms for ligand exchange and further functionalization. [22] White light-emitting diodes (WLEDs) are commonly fabricated by combining inorganic phosphors with a blue or UV LED. [23,24] However, it is not easy to achieve a tailored and fullspectrum white light with currently available phosphors. The light spectra emitted by phosphor-based WLEDs are tuned by adjusting weight ratios of phosphors with different emission wavelengths. QDs behave like phosphors but their emissive colors are controlled by varying the size and composition. QDs have emerged as a good alternative to the phosphors in LEDs. Quantum dots (QDs) can be integrated into a solid-phase color converter (SCC) for white light-emitting diodes (WLEDs). However, the development of QD-based SCCs is prevented by the limitations of the QDs themselves, nonuniform dispersion or aggregation of the QDs, and heat accumulation by low thermal conductivity of the solid matrix. Herein, the development of new high-quality CdZnSeS/ZnS QDs in a one spot synthesis is reported that have high photoluminescence quantum yield (up to 100% for green wavelengths), narrow emission spectra (full width at half maximum< 27.3 nm), and good color tunability in the green region, 496-586 nm. Seven different color QDs are used to fabricate liquid-phase color converters (LCCs) for application in WLEDs with a remote configuration. The best LCC-based WLEDs show not only intense bright day white light (correlated color temperature = 6029 K) with a maximum luminous efficacy of 222.7 lm W −1 , but also excellent color quality (color rendering index = 95.1, as well as R9 = 94.4, and R13 = 97.1), which is very important in medical diagnostic lighting, dressing and display room lighting, painting and accent lighting. These results indicate remarkable progress both in the synthesis of high-quality QDs and in the development of WLEDs for high-performance commercial lighting devices.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/admt.201800235.Semiconductor nanocrystals, namely quantum dots (QDs) have created many innova...

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Sodium Chloride Protected CdHgTe Quantum Dot Based Solid-State Near-Infrared Luminophore for Light-Emitting Devices and Luminescence Thermometry

Cited by 23 publications

References 43 publications

Dual‐Emitting Dihydrophenazines for Highly Sensitive and Ratiometric Thermometry over a Wide Temperature Range

Dual‐Emitting Dihydrophenazines for Highly Sensitive and Ratiometric Thermometry over a Wide Temperature Range

Recent Progress in Fluorescence Imaging of the Near‐Infrared II Window

Highly Luminescent Quantum Dots in Remote‐Type Liquid‐Phase Color Converters for White Light‐Emitting Diodes

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