Credit: Jong Kyu Kim and E. Fred Shubert

Reflections can be a problem for optical technologies, limiting the amount of light absorbed by solar cells or emitted by LEDs. But a new nano coating that virtually eliminates reflections could make such devices more efficient. An LED, say, could emit 40 percent more light, leading to brighter displays. The image at left shows light reflecting from uncoated (top three objects) and coated materials. The second object from the bottom, a piece of semiconductor material used in LEDs, reflects 12 percent of light without the coating. The same semiconductor with the coating (bottom) reflects just 0.1 percent.

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