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IMAGE: A light field with time-dependent frequencies - propagating in a waveguide. Due to self-compression the pulse addresses individual quantum emitters. view more
Credit: University of Innsbruck
In order to exploit the properties of quantum physics technologically, quantum objects and their interaction must be precisely controlled. In many cases, this is done using light. Researchers at the University of Innsbruck and the Institute of Quantum Optics and Quantum Information (IQOQI) of the Austrian Academy of Sciences have now developed a method to individually address quantum emitters using tailored light pulses. Not only is it important to individually control and read the state of the emitters, says Oriol Romero-Isart, but also to do so while leaving the system as undisturbed as possible. Together with Juan Jose? Garci?a-Ripoll (IQOQI visiting fellow) from the Instituto de Fi?sica Fundamental in Madrid, Romero-Isart s research group has now investigated
Credit: College of Engineering, Peking University
During 1995-2015, fullerene derivatives had been the dominating electron acceptors in organic solar cells (OSCs) owing to their performance superior to other acceptors. However, the drawbacks of fullerenes, such as weak visible absorption, limited tunability of electronic properties and morphological instability, restrict further development of OSCs toward higher efficiencies and practical applications. Therefore, the development of new acceptors beyond fullerenes is urgent in the field of OSCs.
Professor Zhan Xiaowei from the College of Engineering at Peking University is one of the pioneers engaging in development of nonfullerene acceptors in the world. In 2007, Zhan s group pioneered perylene diimide-based polymer acceptors (
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IMAGE: Nanomaterials of perovskite dispersed in hexane and irradiated by laser. Light emission by these materials is intense thanks to resistance to surface defects view more
Credit: Luiz Gustavo Bonato
Quantum dots are manmade nanoparticles of semiconducting material comprising only a few thousand atoms. Because of the small number of atoms, a quantum dot s properties lie between those of single atoms or molecules and bulk material with a huge number of atoms. By changing the nanoparticles size and shape, it is possible to fine-tune their electronic and optical properties - how electrons bond and move through the material, and how light is absorbed and emitted by it.
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LOWELL, Mass. - The U.S. Department of Energy has awarded UMass Lowell researchers $1.8 million to develop recyclable plastics and manufacturing technologies to help the country reduce its greenhouse-gas emissions and improve its environmental sustainability.
The grant is funded through the REMADE Institute, a public-private partnership created by the DOE to help the U.S. move toward what s known as a circular economy, in which waste is eliminated as much as possible by continually reusing and recycling resources.
The UMass Lowell project will seek ways to improve the recycling of plastic films from industrial and consumer goods that typically end up in landfills. The research aims to create new uses for the plastic waste and possibilities for the re-manufacturing of sustainable products. Innovative plastics-processing technologies developed by the researchers and industrial partners would create new opportunities for manufacturers across the country, according to UM