In a joint experimental and theoretical effort between Lund University (Sweden), the Russian Academy of Science (Russia), and the Center for Advancing Electronics Dresden at Technische Universität .
Atom swapping could lead to ultra-bright, flexible next generation LEDs
Ella Maru Studio
An international group of researchers has developed a new technique that could be used to make more efficient low-cost light-emitting materials which are flexible and can be printed using ink-jet techniques. The researchers, led by the University of Cambridge and the Technical University of Munich, found that by swapping one out of every one thousand atoms of one material for another, they were able to triple the luminescence of a new material class of light emitters known as halide perovskites. Zoom in ).addClass( image-details ); var $imageCaption = $( ).addClass( image-caption ).text(caption);
In the past decade, the price of solar power has experienced an 89 % drop, while the buildings sector remains responsible for over one-third of global final energy consumption. Could the next generation of beautiful, efficient solar cells help to shift that balance?
Abstract
Oxygen vacancy engineering has been one of the most powerful strategies to enhance the efficiency of oxygen evolution reaction [OER]. Even though the positive effects of surface oxygen vacancy have been well proved, very controversial conclusions are also reported in perovskites. In this work, the roles of oxygen vacancies on the surface and in the bulk of La Sr Co O (LSCO) are well separately investigated by X-ray absorption spectroscopy (surface sensitive) and magnetization measurement (bulk sensitive). The results suggest that massive surface oxygen vacancies have positive effects by enhancing the adsorption, while excessive oxygen vacancies in bulk is double-edged because of the interruptions of exchange interaction of cations with different valence states (Co–O–Co) and smooth transport of electrons. The sample prepared with massive surface oxygen vacancies while with less bulk oxygen vacancies yields 10 times higher specific activity at 1.6 V than commercial IrO .
Scientists in India modeled the performance of tin-based perovskite (methylammonium tin triiodide) finding that with careful optimizations the material could achieve efficiencies beyond 28%.In the fast-moving