Small Size Enhances Charge Transfer in Quantum Dots for Solar Photovoltaics

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feature-0-1387299684752.jpg 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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