Chemically sensitive films for the detection of hazardous substances employing cyanine and nitroso near infrared dyes

Noreña-Franco, Luis E.; Kvasnik, Frank

doi:10.1039/a804634d

Cited by 9 publications

(3 citation statements)

References 7 publications

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“…[16,32] It is worth noticing that a slight performance improvement with respect to the uncoated OPV device was observed also in the presence of the bare H-coating (0 wt.% PB). This behavior may be explained by considering the lower refractive index of the fluorinated H-coating (1.46 for the CTFE-VE resin precursor) [33] compared to that of PET (1.58-1.64) that induces some antireflective properties to the coated system even in the absence of any luminophore in the coating, thus allowing for a modest increase in Jsc.…”

Section: Resultsmentioning

confidence: 99%

Luminescent Downshifting by Photo‐Induced Sol‐Gel Hybrid Coatings: Accessing Multifunctionality on Flexible Organic Photovoltaics via Ambient Temperature Material Processing

Pintossi

Iannaccone

Colombo

et al. 2016

Adv Elect Materials

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A novel high-durability multifunctional organic-inorganic hybrid coating material is presented in this work as luminescent down-shifting (LDS) host matrix system for flexible organic photovoltaic (OPV) devices. Such new LDS coating is obtained by incorporating a convenient fluorescent organic dye in an appropriately functionalized fluoropolymeric resin that can be readily crosslinked by means of a dual-cure mechanism with a single-step ambient-temperature photo-induced sol-gel process. Due to its peculiar characteristics, the newly proposed system may be readily implemented in heat-sensitive flexible devices. By carefully tuning the amount of organic fluorophore in the hybrid coating material, a maximum increase in power conversion efficiency exceeding 4% is achieved on devices incorporating the new LDS layer with respect to control systems. This represents the highest efficiency enhancement reported to date on flexible OPVs by means of a polymer-based LDS layer. In addition, long-term accelerated weathering tests (>550 h) highlight the excellent stability of LDS-coated OPV devices, which can retain 80% of their initial performance, as opposed to the dramatic efficiency decay experienced by control uncoated devices. The approach presented here opens the way to the straightforward incorporation of versatile multifunctional light-managing layers on flexible OPV systems for improved device efficiency and lifetime

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Section: Resultsmentioning

confidence: 99%

Luminescent Downshifting by Photo‐Induced Sol‐Gel Hybrid Coatings: Accessing Multifunctionality on Flexible Organic Photovoltaics via Ambient Temperature Material Processing

Pintossi

Iannaccone

Colombo

et al. 2016

Adv Elect Materials

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“…Compounds of this type are all considered to contain a conjugated π-electron system. And for a chromophore to absorb at wavelengths in the near-infrared, the π-electrons must be delocalised especially along the conjugated chain [4][5][6][7]. Near-infrared absorbing organic molecules are compounds that interact with near infrared light and can also emit such near infrared light when under external stimulation like photoexcitation, chemical reactions and electric field [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

The application of disperse dyes derived from 4-bromoaniline and 3-chloroaniline on to polyester fabric

Otutu¹,

Ossai²,

Ameuru³

et al. 2019

Bull. Chem. Soc. Eth.

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A series of new disazo disperse dye compounds based on 4-amino-2-chlorophenylazo-4bromobenzene intermediate were prepared by linking various arylamines and phenolic derivatives to this intermediate through diazo coupling reactions. The structures of the azo compounds were confirmed by FT-IR, 1 H NMR, 13 C NMR and UV-visible spectral data. The results of the UV-vis absorption spectra of some of the dyes showed near-infrared absorptions around 573-800 nm. The results of the colour fastness to washing and sublimation gave an excellent value of grade 5. The light fastness values were found to be technically acceptable with the grey-scale grade of 5 to 6-7. Also, the rubbing fastness was observed to be grade 3/4 to 4.

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“…The restructuring of the dye molecule during the interaction with other molecules leads to a change in its properties that are essential for using the dye as a core element of sensor devices [4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Polymethine Dye as Sensors of NH₃ and CO

et al. 2017

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We have investigated the properties of polymethine dyes (PMD) and the purpose of using them as sensors of hazardous gases presence. Research indicates that in case of utilizing PMD as a sensor of hazardous gases we need to use the monochromatic light which wavelength corresponds to the inflection point of the long-wave absorption edge of PMD. Such sensor of hazardous gases can detect changes in the optical density of the sensor layer or the light intensity transmitted through the layer.

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Chemically sensitive films for the detection of hazardous substances employing cyanine and nitroso near infrared dyes

Cited by 9 publications

References 7 publications

Luminescent Downshifting by Photo‐Induced Sol‐Gel Hybrid Coatings: Accessing Multifunctionality on Flexible Organic Photovoltaics via Ambient Temperature Material Processing

Luminescent Downshifting by Photo‐Induced Sol‐Gel Hybrid Coatings: Accessing Multifunctionality on Flexible Organic Photovoltaics via Ambient Temperature Material Processing

The application of disperse dyes derived from 4-bromoaniline and 3-chloroaniline on to polyester fabric

Polymethine Dye as Sensors of NH₃ and CO

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Chemically sensitive films for the detection of hazardous substances employing cyanine and nitroso near infrared dyes

Cited by 9 publications

References 7 publications

Luminescent Downshifting by Photo‐Induced Sol‐Gel Hybrid Coatings: Accessing Multifunctionality on Flexible Organic Photovoltaics via Ambient Temperature Material Processing

Luminescent Downshifting by Photo‐Induced Sol‐Gel Hybrid Coatings: Accessing Multifunctionality on Flexible Organic Photovoltaics via Ambient Temperature Material Processing

The application of disperse dyes derived from 4-bromoaniline and 3-chloroaniline on to polyester fabric

Polymethine Dye as Sensors of NH3 and CO

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Polymethine Dye as Sensors of NH₃ and CO