A Brief History of Fluorescence and Phosphorescence before the Emergence of Quantum Theory

Valeur, Bernard; Berberan‐Santos, Mário N.

doi:10.1021/ed100182h

Cited by 246 publications

(185 citation statements)

References 37 publications

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“…39 The term 'luminescence' was introduced in 1888 by Wiedemann. 40 Luminescence can be generated from different types of energetic sources, including electromagnetic radiations, electric fields, X-rays, and charged particles from radioactive decay. Depending upon the nature of the excitation source, luminescence can be subdivided into several categories that are generally indicated by a prefix.…”

Section: Luminescencementioning

confidence: 99%

Enhancing solar cell efficiency: the search for luminescent materials as spectral converters

et al. 2013

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Photovoltaic (PV) technologies for solar energy conversion represent promising routes to green and renewable energy generation. Despite relevant PV technologies being available for more than half a century, the production of solar energy remains costly, largely owing to low power conversion efficiencies of solar cells. The main difficulty in improving the efficiency of PV energy conversion lies in the spectral mismatch between the energy distribution of photons in the incident solar spectrum and the bandgap of a semiconductor material. In recent years, luminescent materials, which are capable of converting a broad spectrum of light into photons of a particular wavelength, have been synthesized and used to minimize the losses in the solar-cell-based energy conversion process. In this review, we will survey recent progress in the development of spectral converters, with a particular emphasis on lanthanide-based upconversion, quantum-cutting and down-shifting materials, for PV applications. In addition, we will also present technical challenges that arise in developing cost-effective high-performance solar cells based on these luminescent materials.

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Section: Luminescencementioning

confidence: 99%

Enhancing solar cell efficiency: the search for luminescent materials as spectral converters

et al. 2013

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“…Such a substance emits more visible light than it receives, making it appear brighter than a non-fluorescent substance which, at best, can only reflect the visible light that is falling on it 3) . The fluorescence phenomenon was mentioned in literature very early 4) , long before the physicist Sir George Gabriel Stokes coined the term in 1852 5) . Already in 1565 the physician and botanist Nicolás Monardes reported a method to identify the wood of Eysenhardtia polystachya known as Lignum nephriticum and having medicinal properties by observing its autofluorescence under special illuminating conditions.…”

Section: Introductionmentioning

confidence: 99%

Fluorescence properties of commercial composite resin restorative materials in dentistry

Meller¹,

Klein²

2012

Dent. Mater. J.

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The objective was to assess the fluorescence properties of current commercial resin composites. Sixteen light-curing resin composites, representing a total number of 241 shades, were analyzed. Fluorescence measurements of all samples were taken using the monochromator-based fluorescence reader Synergy TM Mx (BioTek Instruments Inc.). Additionally, samples of dentin and enamel were analyzed for comparison. The mean of the maximum excitation wavelength was (398±5) nm and the mean of the resulting emission wavelength was (452±9) nm for all composite shades. The maximum fluorescence varied widely between 50 and 70,808 RFU with a mean of (28,948±15,380) RFU. The maximum for dentin was (9,308±3,676) RFU and enamel (5,467±506) RFU. The results showed that the analyzed composites fluoresced at nearly the same excitation-emission wavelengths combination but with varying optical intensities. These results provide useful reference for optimal fluorescence induction and may help to develop better fluorescence diagnostic methods needed for treatment, forensic investigations and epidemiological research/analyses.

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“…Further alternatives are chemoluminescence 18 and fluorescence. 19 However, these techniques can experience bleaching and require specific and often expensive optical filters and, furthermore, invasive chemical species that interact with the sample of interest. Because of all these limitations, absorption spectroscopy is a commonly used detection method.…”

mentioning

confidence: 99%

Multiscattering-Enhanced Absorption Spectroscopy

2015

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An original scheme for sensitive absorption measurements, particularly well-suited for low analyte concentrations, is presented. The technique is based on multiscattering-enhanced absorption spectroscopy (MEAS) and benefits from the advantages of conventional absorption spectroscopy: simplicity, rapidity, and low costs. The technique relies on extending the optical path through the sensing volume by suspending dielectric beads in the solution containing the analytes of interest, resulting in multiple scattering of light, which increases the optical path length through the sample. This way, a higher sensitivity and lower limit of detection, compared to those of conventional absorption spectroscopy, can be achieved. The approach is versatile and can be used for a broad variety of analytes. Here, it is applied to the detection of phenol red, 10 nm gold nanoparticles, and envy green fluorescence dye; the limit of detection is decreased by a factor of 7.2 for phenol red and a factor of 3.3 for nanoparticles and dye. The versatility of this approach is illustrated by its application in increasing the sensitivity of colorimetric detection with gold nanoparticle probes and a commercially available hydrogen peroxide bioassay. The influence of different parameters describing the scattering medium is investigated in detail experimentally and numerically, with very good agreement between the two. Those parameters can be effectively used to tailor the enhancement for specific applications and analytes.

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A Brief History of Fluorescence and Phosphorescence before the Emergence of Quantum Theory

Cited by 246 publications

References 37 publications

Enhancing solar cell efficiency: the search for luminescent materials as spectral converters

Enhancing solar cell efficiency: the search for luminescent materials as spectral converters

Fluorescence properties of commercial composite resin restorative materials in dentistry

Multiscattering-Enhanced Absorption Spectroscopy

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