Small size enhances charge transfer in quantum dots

(Phys.org) —Quantum dots—tiny semiconductor crystals with diameters measured in billionths of a meter—have enormous potential for applications that make use of their ability to absorb or emit light and/or electric charges. Examples include more vividly colored light-emitting diodes (LEDs), photovoltaic solar cells, nanoscale transistors, and biosensors. But because these applications have differing—sometimes opposite—requirements, finding ways to control the dots' optical and electronic properties is crucial to their success.

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