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20 Current news about the topic photoluminescence

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Glowing nanocrystals

BAM develops measurement methods for luminescent materials

03-Aug-2021

Tiny luminous particles are being used in more and more products today: from smartphones to OLED televisions to car headlights. Precise knowledge of the luminosity is crucial for industry. The Federal Institute for Materials Research and Testing (BAM) is developing reliable measurement methods ...

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Shedding light on perovskite films

Efficient materials for future solar cells - New model to determine photoluminescence quantum efficiency

16-Mar-2021

Photovoltaics decisively contributes to sustainable energy supply. The efficiency of solar cells in directly converting light energy into electrical energy depends on the material used. Metal-halide perovskites are considered very promising materials for solar cells of the next generation. With ...

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Black phosphorus-based van der Waals heterostructures for mid-infrared light-emission applications

14-Jul-2020

MIR spectra have been widely used for thermal imaging, molecule characterizations, and communications. MIR light source is the key component of MIR technologies. Among them, MIR light-emitting diodes (LED) show advantages of narrow linewidth, low power consumption and portability. Since the ...

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Properties of graphene change due to water and oxygen

06-Dec-2019

We often find that food becomes rotten when we leave it outside for long and fruits turn brown after they are peeled or cut. Such phenomena can be easily seen in our daily life and they illustrate the oxidation-reduction reaction. The fundamental principle controlling physical properties of ...

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Insight into loss processes in perovskite solar cells enables efficiency improvements

03-Aug-2018

In perovskite solar cells, charge carriers are mainly lost through recombination occurring at interface defect sites. In contrast, recombination at defect sites within the perovskite layer does not limit the performance of the solar cells at present. Teams from the University of Potsdam and the ...

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The fine-tuning of two-dimensional materials

02-Mar-2018

A new understanding of why synthetic 2-D materials often perform orders of magnitude worse than predicted was reached by teams of researchers led by Penn State. They searched for ways to improve these materials' performance in future electronics, photonics, and memory storage ...

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Watching atoms move in hybrid perovskite crystals reveals clues to improving solar cells

23-Nov-2017

A team of researchers led by the University of California San Diego has for the first time observed nanoscale changes deep inside hybrid perovskite crystals that could offer new insights into developing low-cost, high-efficiency solar cells. Using X-ray beams and lasers, researchers studied how a ...

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Missing atoms in a forgotten crystal bring luminescence

12-Oct-2017

A little-studied member of the perovskite family of materials could find use in a range of electronic devices, after researchers at KAUST discovered the secret of its strong photoluminescence. Perovskites are a wide group of materials that are known to have remarkable optical and electronic ...

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Application of air-sensitive semiconductors in nanoelectronics

25-Sep-2017

A research group consisting of scientists from Tomsk Polytechnic University, Germany and Venezuela proved vulnerability of a two-dimensional semiconductor gallium selenide in air. This discovery will allow manufacturing superconducting nanoelectronics based on gallium selenide, which has never ...

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Surgery on nanoparticles

13-Jun-2017

A team of chemists led by Carnegie Mellon University's Rongchao Jin has for the first time conducted site-specific surgery on a nanoparticle. The procedure, which allows for the precise tailoring of nanoparticles, stands to advance the field of nanochemistry. The surgical technique developed by ...

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