Ultrathin solar cells reach a record of nearly 20% efficiency

Researchers at the Centre de Nanosciences et de Nanotechnologies (C2N), in collaboration in particular with researchers at the German Fraunhofer ISE, have succeeded to trap sunlight efficiently in a solar cell thanks to an ultrathin absorbing layer made of …

Experimental demonstration of an on-chip, passive high-rejection filter in silicon

Physicists at C2N and Institut de Physique de Nice have found a simple and generic strategy to overcome one of the major limitations in the fabrication of on-chip filters. They experimentally demonstrated an optical rejection exceeding 80 dB, without …

Macroscopic electron quantum coherence in a solid-state circuit

A team of researchers of C2N achieved in an experimental work a coherent propagation of electrons in circuits over macroscopic distances through a novel nano-engineering strategy. The quantum coherence of electronic quasiparticles underpins many of the emerging transport …