Organic LEDs Shine Invisibly

Researchers at the University of Southern California have designed a phosphorescent dye molecule that emits near-infrared light and have used it to make long-lasting organic light-emitting diodes. The diodes could be used to make a cheap and flexible near-infrared display that would be unreadable to the naked eye but could be read with night-vision goggles. Such a display could be integrated into a soldier’s uniform or a device that could be stashed in a pocket, allowing soldiers to read communications at night without being spotted by enemy snipers

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