Quantum wells enable record-efficiency two-junction solar cell

Researchers from the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) and the University of New South Wales achieved a new world-record efficiency for two-junction solar cells, creating a cell with ...

Topological nanoelectronics

Topological insulators are materials with astonishing properties: Electric current flows only along their surfaces or edges, whereas the interior of the material behaves as an insulator. In 2007, Professor Laurens Molenkamp ...

Keeping cool with quantum wells

University of Tokyo researchers have announced a new approach for electrical cooling without the need for moving parts. By applying a bias voltage to quantum wells made of the semiconductor aluminum gallium arsenide, electrons ...

Understanding high efficiency of deep ultraviolet LEDs

Deep ultraviolet light-emitting diodes (DUV-LEDs) made from aluminium gallium nitride (AlGaN) efficiently transfer electrical energy to optical energy due to the growth of one of its bottom layers in a step-like fashion. ...

Scientists go deep to quantify perovskite properties

Scientists led by Rice University and Los Alamos National Laboratory have discovered electronic properties in quantum-scale devices that are likely to impact the growing field of low-cost perovskite based optoelectronics.

The microscopic origin of efficiency droop in LEDs

Light-emitting diodes—or LEDs, as they are commonly known—have been slowly replacing incandescent light bulbs in applications ranging from car taillights to indicators on electronics since their invention in the 1960s.

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